Modify Ethereum data file location
Publish: 2021-05-08 12:45:48
1. At the top of Ethereum is DAPP. It exchanges with the smart contract layer through Web3. JS. All smart contracts run on EVM (Ethereum virtual machine) and use RPC calls. Below EVM and RPC are the four core contents of Ethereum, including: blockchain, consensus algorithm, mining and network layer. Except DAPP, all other parts are in the Ethereum client. The most popular Ethereum client is geth (go Ethereum)
2. You can install a computer manager on the computer, then open the toolbox and find the software management
in it, you can see that there is the function of unloading, and the specific function of the software will be displayed on it, and then click to unload
in it, you can see that there is the function of unloading, and the specific function of the software will be displayed on it, and then click to unload
3. Chmod 666 ifcfg-eth0
however, since you are not the owner of the file, you generally do not have permission to do this operation
generally, the root user is required to modify the file
however, since you are not the owner of the file, you generally do not have permission to do this operation
generally, the root user is required to modify the file
4. This may be caused by the binding of the MAC address of the system
you edit the file / etc / udev / rulesd / 70-persistent-net.rules
and delete all the codes related to the MAC address, basically the first three lines of comments will not be deleted
save and exit, restart the computer to have a look
to be on the safe side, give the file / etc / network / interface permission
command chittr + I / etc / network / interface
so that the configuration file will not be changed by the system
you edit the file / etc / udev / rulesd / 70-persistent-net.rules
and delete all the codes related to the MAC address, basically the first three lines of comments will not be deleted
save and exit, restart the computer to have a look
to be on the safe side, give the file / etc / network / interface permission
command chittr + I / etc / network / interface
so that the configuration file will not be changed by the system
5. According to Blizzard's setting, Warcraft uses five farmers to collect gold, and more than five will be idle population
hope to adopt
hope to adopt
6. Raid (rendant array of Independent Disks) refers to the combination of multiple independent hard disks (yellow storage area in the figure) into a larger logical array (storage area with slash). Data is stored on this array of disks with additional rendant information. Rendant information can be the data itself (mirror)
7. Do you get off at Chengzhan? From Hangzhou City railway station, walk to the bus city railway station, take k518 bus, take 8 bus stops, get off at Jingfang District 5 bus stop, transfer to k100 bus, take 12 bus stops, get off at Hangzhou Jiubao passenger transport center, and take the express bus from Hangzhou to Fenghua at Jiubao passenger transport center. There is more than one bus line from Chengzhan to Jiubao passenger transport center. You can refer to e city for the specific line. Of course, you can also take EMUs to Fenghua, but there are few EMUs from Hangzhou to Fenghua. There are one at 7:50 and one at 8:52 in the morning. Personal feeling or by car convenient, after all, Fenghua railway station is more remote!
8. It's very easy to change coins with empty hands. Hide the coins at the base of the thumb with the thumb root or tiger mouth method. When facing the audience, the thumb is just in front of the audience's line of sight. When playing the middle finger, the index finger and the middle finger pull out the coins together. However, the technique needs to be practiced, otherwise it will be seen by the audience:)
in fact, it is very simple. If your hand is naturally placed on the table, then you should stick the coin in the tiger's mouth, that is, between your thumb and index finger, and the coin is parallel to the table. So the thumb just blocks the coin stuck here in the front. This is slightly different from the thumb root hiding method. This is not the face of the coin, but the edge of the coin stuck between the thumb and index finger. This also makes it easy to pull the coin out of the mouth of the tiger with two fingers. 2、 The pure technique of changing a dime into a dollar has a great effect
this is a coin magic trick that I used to play a long time ago. The principle is simple and the effect is very good. Don't think it's simple and don't practice it
effect: open your hands, show an ordinary five dime coin, then rub it with your hands, it will become one yuan coin, and then break it apart, it will become two one yuan coins. Put the coin in the palm of your hand, you only see two one dollar coins, and the five dimes disappear
Teaching:
preparation: prepare two one dollar coins (superimposed together), hold them horizontally with the first knuckle of the thumb and index finger of the right hand, and then put a Pentagon coin vertically in front of the one dollar coin to block them, so that from the side, it looks like a horizontal t. From the front, the front five corners will block the audience's sight and hide the two one yuan coins behind
operation: show the 50 cents to the audience on the front (pay attention to the fact that the audience's line of sight must be level with the 50 cents, so that the audience can only see a small 50 cents), open your hands (I don't think you will open the two fingers of the coin), and explain that there is nothing else in your hands
with the thumb of the left hand, push the dime back to the back of the one yuan coin, and at the same time, erect the one yuan coin vertically, and show the plane of the coin to the audience (the audience will see a one yuan coin, and the five yuan coin is on the back of the one yuan coin), then separate the two superimposed one yuan coins with the left hand, and hold them with the thumb and index finger (the other four fingers should be kept open), There is a dime on the back of the coin on the left hand, and the right hand is holding the correct one. At this time, you can toss the coin on the right hand several times (for display), and then conveniently put the one in the left hand on the palm of the right hand (remember to cover the five dime hard coin with one yuan, the palm is concave, it seems that the one won't tilt up). In this way, the audience can see that there are completely two one dollar coins on the left hand. The right hand picks up the one dollar that has no problem and gives it to the audience for inspection. The left hand conveniently puts the two left heart coins back into the pocket. Ha ha, let the audience study it slowly
my experience:
1. The display must be in line with the audience's vision< br />2 After the coins are separated, the remaining four fingers should be opened. You should hide the fifty cents completely behind the one dollar< br />3 Finally, put the one yuan and five jiao in the palm of your hand flat and cover well
there are many ways to deal with the dime at the back of this magic trick. It's much better to use Tibetan currency. If you give the audience two or one yuan, the effect will be better and there will be no doubt. Here is just for beginners to provide an effect, do familiar with their own know the change<
Third, the translation teaching of salt shaker and quarter
effect:
the magician asks the audience for a coin and puts it on the table. The magician said, "now I'm going to use a salt bottle (ordinary transparent cup can also be used) to let your coins pass through the table made of solid materials." The magician then said, "in order not to let the bottle be broken by the coin, I will wrap the bottle with a napkin.", Then the magician took a napkin and wrapped the whole bottle
"OK, show begins!", The magician put the bottle on the coin and said something in his mouth! When he opened the bottle, ～～～～～～ hungry ～～～ the coin was still there ～～ the magician was a little embarrassed ～～～ but he said: "by the way, I forgot to press the bottle hard, so the coin didn't go through! Come on, come again. ", OK ~ ~ then the magician repeated the above steps, and suddenly pressed down with both hands<
the whole bottle has been off the table for hours, only left coins and napkins ~ the audience faints ~
Secret:
it's very simple, when you let the coin disappear for the first time, it's actually a misdirection ~ this Misdirection is to make the audience think that you want to make the coin disappear, not the bottle / cup
when you "fail" for the first time, You need to focus the audience's attention on the coin instead of the bottle / cup wrapped in napkin.
when their attention is on the coin, you can quietly move the bottle / quilt towards your own body, then relax the napkin and let the bottle fall on your lap. Because the napkin has a certain hardness, it won't soften immediately, From the audience's point of view, you still have a bottle in your hand
then raise your thigh to prevent the bottle from falling down
note: the above series of actions should be fast! Don't perform until you're familiar with it
OK, next, put the "bottle" on the coin (don't let the audience see that you don't have a bottle in it), Finally, it depends on your acting skills
[empty bowl becomes money]
props preparation:
two bowls
two yuan coins
performance steps:
1. Hold two empty bowls to show that there is no money in the bowl
2. Make the two bowls overlap
3. Turn the two bowls to make the bowl mouth up
4. Take the upper bowl and close the two bowls
5. Please open the bowl, The coin is in the bowl
Magic Trick:
ha! i see! do you understand? Magic is a combination of life and creativity. How about a good performance at dinner? First, hide the coin at the bottom of the bowl and press it with your hand. Pay attention to the second step. When the two bowls overlap, cover the bottom of the bowl with the upper bowl. Note: the thickness of the bottom of the bowl is different. Please adjust the number of coins
smell coins
1. Take three coins
2 let the audience hold the coin in their hands for 10 seconds
3. Smell it with your nose to find it out
Secret: the coin in your hand is warm, just touch it with your nose. However, inhale hard to make people open as if you are really smelling. Empty handed coins:
stretch out your right hand, palm to the audience, and then use your thumb to play the index finger, ring finger and middle finger respectively. When you play the middle finger, you suddenly have a coin in your hand! Do you know how to do it? It's a trick
it's very simple to hide the coin at the base of the thumb with the thumb root or tiger mouth method. When facing the audience, the thumb is just in front of the audience's line of sight. When playing the middle finger, the index finger and the middle finger pull the coin out together. However, the technique needs to be practiced, otherwise it will make the audience see it:)
Add: seeing many friends, I still don't know how the coins are hidden, so it seems that I haven't made it clear. In fact, it's very simple. If your hand is naturally placed on the table, then stick the coin in the mouth of the tiger, that is, between your thumb and index finger, and the coin is parallel to the table. So the thumb just blocks the coin stuck here in the front. This is slightly different from the thumb root hiding method. This is not the face of the coin, but the edge of the coin stuck between the thumb and index finger. This also makes it easy to pull the coin out of the mouth of the tiger with two fingers. Do you understand<
material: 1 coin
method: first pick up the coin with your left hand ~! Make a fist with your right hand ~! But there should be a hole ~! Put the coin in the square, but it's not really put in. You should cover the coin with the index finger and middle finger of your left hand ~! Then blow with your mouth to your right hand ~! Finally, move your right hand away from your left! When all the audience are watching your right hand, don't open it to the audience! You have to put the money in your left hand pocket ~! Then it's on ~! Then you show your left hand to the audience! OK, then it's done ~<
several Coins magic teaching (detailed text teaching)
first, coins disappear (detailed text teaching)
only after mastering this important performance skill, can you perform other coin magic programs better
The Magician puts a coin on the fingertip of his left hand and gently takes the coin from his left hand,
then the magician blows into his right hand... A little rub... Open your right hand... The coin is missing
performance method:
1. Hold a coin horizontally with your left fingertip upward, so that the audience can't see the gap between them
2. Put your right thumb down and the rest of your fingers up, and reach into your left hand from the back, ready to hold a coin at the same time. After that, the audience should not be able to see the coins in their hands
3. Let the fingers of the right hand cover the whole coin and wrap it tightly
4. When the right hand is still in place, the left thumb releases the coin and makes it slip into the root of the left finger
5. Next, the right hand is fist shaped, pretending to have taken the coin from the left hand< Next, turn your hands over as you turn your body to the right. As long as you turn your left hand to the inside, that is, to the side of your body, you can't see the coin in your hand. At the same time, turn the right hand so that the closed fingers point at the audience. When you rotate your hands, you can also point your left index finger to your right hand. In the above operation process, your eyes should always look at the right hand, put a pair of hands holding coins
7. When moving the right hand outward, drop the left hand on the side of the body and hold the coin with a curved finger. Your eyes should be fixed on your right hand from beginning to end, which is called disturbing the audience's sight
8. Start to rub slowly with your right finger, as if you are going to grind the coin off completely. Then, opening the right hand indicates that the coin has completely disappeared
two, pure technique of the five dimes into a dollar, the effect is excellent
this is a coin magic trick that I used to play a long time ago. The principle is simple and the effect is very good. Don't think it's simple and don't practice it
effect: open your hands, show an ordinary five dime coin, then rub it with your hands, it will become one yuan coin, and then break it apart, it will become two one yuan coins. Put the coin in the palm of your hand, you only see two one dollar coins, and the five dimes disappear
Teaching:
preparation: prepare two one dollar coins (superimposed together), hold them horizontally with the first knuckle of the thumb and index finger of the right hand, and then put a Pentagon coin vertically in front of the one dollar coin to block them, so that from the side, it looks like a horizontal t. From the front, the front five corners will block the audience's sight and hide the two one yuan coins behind
operation: show the 50 cents to the audience on the front (pay attention that the audience's line of sight must be level with the 50 cents, so that the audience can only see a small 50 cents), open your hands (I don't think you will take two of the coins)
in fact, it is very simple. If your hand is naturally placed on the table, then you should stick the coin in the tiger's mouth, that is, between your thumb and index finger, and the coin is parallel to the table. So the thumb just blocks the coin stuck here in the front. This is slightly different from the thumb root hiding method. This is not the face of the coin, but the edge of the coin stuck between the thumb and index finger. This also makes it easy to pull the coin out of the mouth of the tiger with two fingers. 2、 The pure technique of changing a dime into a dollar has a great effect
this is a coin magic trick that I used to play a long time ago. The principle is simple and the effect is very good. Don't think it's simple and don't practice it
effect: open your hands, show an ordinary five dime coin, then rub it with your hands, it will become one yuan coin, and then break it apart, it will become two one yuan coins. Put the coin in the palm of your hand, you only see two one dollar coins, and the five dimes disappear
Teaching:
preparation: prepare two one dollar coins (superimposed together), hold them horizontally with the first knuckle of the thumb and index finger of the right hand, and then put a Pentagon coin vertically in front of the one dollar coin to block them, so that from the side, it looks like a horizontal t. From the front, the front five corners will block the audience's sight and hide the two one yuan coins behind
operation: show the 50 cents to the audience on the front (pay attention to the fact that the audience's line of sight must be level with the 50 cents, so that the audience can only see a small 50 cents), open your hands (I don't think you will open the two fingers of the coin), and explain that there is nothing else in your hands
with the thumb of the left hand, push the dime back to the back of the one yuan coin, and at the same time, erect the one yuan coin vertically, and show the plane of the coin to the audience (the audience will see a one yuan coin, and the five yuan coin is on the back of the one yuan coin), then separate the two superimposed one yuan coins with the left hand, and hold them with the thumb and index finger (the other four fingers should be kept open), There is a dime on the back of the coin on the left hand, and the right hand is holding the correct one. At this time, you can toss the coin on the right hand several times (for display), and then conveniently put the one in the left hand on the palm of the right hand (remember to cover the five dime hard coin with one yuan, the palm is concave, it seems that the one won't tilt up). In this way, the audience can see that there are completely two one dollar coins on the left hand. The right hand picks up the one dollar that has no problem and gives it to the audience for inspection. The left hand conveniently puts the two left heart coins back into the pocket. Ha ha, let the audience study it slowly
my experience:
1. The display must be in line with the audience's vision< br />2 After the coins are separated, the remaining four fingers should be opened. You should hide the fifty cents completely behind the one dollar< br />3 Finally, put the one yuan and five jiao in the palm of your hand flat and cover well
there are many ways to deal with the dime at the back of this magic trick. It's much better to use Tibetan currency. If you give the audience two or one yuan, the effect will be better and there will be no doubt. Here is just for beginners to provide an effect, do familiar with their own know the change<
Third, the translation teaching of salt shaker and quarter
effect:
the magician asks the audience for a coin and puts it on the table. The magician said, "now I'm going to use a salt bottle (ordinary transparent cup can also be used) to let your coins pass through the table made of solid materials." The magician then said, "in order not to let the bottle be broken by the coin, I will wrap the bottle with a napkin.", Then the magician took a napkin and wrapped the whole bottle
"OK, show begins!", The magician put the bottle on the coin and said something in his mouth! When he opened the bottle, ～～～～～～ hungry ～～～ the coin was still there ～～ the magician was a little embarrassed ～～～ but he said: "by the way, I forgot to press the bottle hard, so the coin didn't go through! Come on, come again. ", OK ~ ~ then the magician repeated the above steps, and suddenly pressed down with both hands<
the whole bottle has been off the table for hours, only left coins and napkins ~ the audience faints ~
Secret:
it's very simple, when you let the coin disappear for the first time, it's actually a misdirection ~ this Misdirection is to make the audience think that you want to make the coin disappear, not the bottle / cup
when you "fail" for the first time, You need to focus the audience's attention on the coin instead of the bottle / cup wrapped in napkin.
when their attention is on the coin, you can quietly move the bottle / quilt towards your own body, then relax the napkin and let the bottle fall on your lap. Because the napkin has a certain hardness, it won't soften immediately, From the audience's point of view, you still have a bottle in your hand
then raise your thigh to prevent the bottle from falling down
note: the above series of actions should be fast! Don't perform until you're familiar with it
OK, next, put the "bottle" on the coin (don't let the audience see that you don't have a bottle in it), Finally, it depends on your acting skills
[empty bowl becomes money]
props preparation:
two bowls
two yuan coins
performance steps:
1. Hold two empty bowls to show that there is no money in the bowl
2. Make the two bowls overlap
3. Turn the two bowls to make the bowl mouth up
4. Take the upper bowl and close the two bowls
5. Please open the bowl, The coin is in the bowl
Magic Trick:
ha! i see! do you understand? Magic is a combination of life and creativity. How about a good performance at dinner? First, hide the coin at the bottom of the bowl and press it with your hand. Pay attention to the second step. When the two bowls overlap, cover the bottom of the bowl with the upper bowl. Note: the thickness of the bottom of the bowl is different. Please adjust the number of coins
smell coins
1. Take three coins
2 let the audience hold the coin in their hands for 10 seconds
3. Smell it with your nose to find it out
Secret: the coin in your hand is warm, just touch it with your nose. However, inhale hard to make people open as if you are really smelling. Empty handed coins:
stretch out your right hand, palm to the audience, and then use your thumb to play the index finger, ring finger and middle finger respectively. When you play the middle finger, you suddenly have a coin in your hand! Do you know how to do it? It's a trick
it's very simple to hide the coin at the base of the thumb with the thumb root or tiger mouth method. When facing the audience, the thumb is just in front of the audience's line of sight. When playing the middle finger, the index finger and the middle finger pull the coin out together. However, the technique needs to be practiced, otherwise it will make the audience see it:)
Add: seeing many friends, I still don't know how the coins are hidden, so it seems that I haven't made it clear. In fact, it's very simple. If your hand is naturally placed on the table, then stick the coin in the mouth of the tiger, that is, between your thumb and index finger, and the coin is parallel to the table. So the thumb just blocks the coin stuck here in the front. This is slightly different from the thumb root hiding method. This is not the face of the coin, but the edge of the coin stuck between the thumb and index finger. This also makes it easy to pull the coin out of the mouth of the tiger with two fingers. Do you understand<
material: 1 coin
method: first pick up the coin with your left hand ~! Make a fist with your right hand ~! But there should be a hole ~! Put the coin in the square, but it's not really put in. You should cover the coin with the index finger and middle finger of your left hand ~! Then blow with your mouth to your right hand ~! Finally, move your right hand away from your left! When all the audience are watching your right hand, don't open it to the audience! You have to put the money in your left hand pocket ~! Then it's on ~! Then you show your left hand to the audience! OK, then it's done ~<
several Coins magic teaching (detailed text teaching)
first, coins disappear (detailed text teaching)
only after mastering this important performance skill, can you perform other coin magic programs better
The Magician puts a coin on the fingertip of his left hand and gently takes the coin from his left hand,
then the magician blows into his right hand... A little rub... Open your right hand... The coin is missing
performance method:
1. Hold a coin horizontally with your left fingertip upward, so that the audience can't see the gap between them
2. Put your right thumb down and the rest of your fingers up, and reach into your left hand from the back, ready to hold a coin at the same time. After that, the audience should not be able to see the coins in their hands
3. Let the fingers of the right hand cover the whole coin and wrap it tightly
4. When the right hand is still in place, the left thumb releases the coin and makes it slip into the root of the left finger
5. Next, the right hand is fist shaped, pretending to have taken the coin from the left hand< Next, turn your hands over as you turn your body to the right. As long as you turn your left hand to the inside, that is, to the side of your body, you can't see the coin in your hand. At the same time, turn the right hand so that the closed fingers point at the audience. When you rotate your hands, you can also point your left index finger to your right hand. In the above operation process, your eyes should always look at the right hand, put a pair of hands holding coins
7. When moving the right hand outward, drop the left hand on the side of the body and hold the coin with a curved finger. Your eyes should be fixed on your right hand from beginning to end, which is called disturbing the audience's sight
8. Start to rub slowly with your right finger, as if you are going to grind the coin off completely. Then, opening the right hand indicates that the coin has completely disappeared
two, pure technique of the five dimes into a dollar, the effect is excellent
this is a coin magic trick that I used to play a long time ago. The principle is simple and the effect is very good. Don't think it's simple and don't practice it
effect: open your hands, show an ordinary five dime coin, then rub it with your hands, it will become one yuan coin, and then break it apart, it will become two one yuan coins. Put the coin in the palm of your hand, you only see two one dollar coins, and the five dimes disappear
Teaching:
preparation: prepare two one dollar coins (superimposed together), hold them horizontally with the first knuckle of the thumb and index finger of the right hand, and then put a Pentagon coin vertically in front of the one dollar coin to block them, so that from the side, it looks like a horizontal t. From the front, the front five corners will block the audience's sight and hide the two one yuan coins behind
operation: show the 50 cents to the audience on the front (pay attention that the audience's line of sight must be level with the 50 cents, so that the audience can only see a small 50 cents), open your hands (I don't think you will take two of the coins)
9.
The first generation sample gun of xm8 adopts a kind of integrated aiming device, which combines red dot reflective close combat optical sight (CCO), infrared laser indicator and infrared lamp. With one aiming device, the functions of m68cco, an / peq-2 and an / paq-4 are included. This kind of multi in one sight reces the volume and weight. It doesn't need to install different accessories on different positions of guide rail or gearbox like M16 / M4, and it doesn't need to reset each sight separately when zeroing the sight. It can be completed at one time. However, the aiming device of the first generation sample gun has only CCO function, and only space for other function moles is reserved. The reflective sight without magnification enables the shooter to aim with both eyes and capture the target quickly. The backup division is etched on the sight. If the battery is exhausted and can not be replenished in time, it can continue to aim and shoot. In addition, in the early design of xm8, it was required to use the wireless switch to control the various functions of the sight. The shooter can install the wireless switch on any part of the gun body according to his own habits
many items listed in the conceptual design of the second generation xm8 sample gun but not implemented in the first generation sample gun are added to the second generation sample gun. For example, the aiming device of the first generation sample gun has only one function of reflective red dot sight, while the second generation sample gun has realized other functions of the integrated aiming system, and provides two kinds of aiming devices
the first sight is equivalent to the functional combination of CcO and peq-2 currently used in M16 / M4 system. It is generally used for standard or compact or light machine gun type, with a total weight of 272g, including a reflective sight without magnification. The red dot division specification is 1.5moa (1.5 inches above 100 yards), In addition, an infrared laser indicator with an operating distance of 800 meters and an infrared lamp with an operating distance of 600 meters are powered by a lithium battery
the second sight is equivalent to the function combination of ACOG and peq-2. It is generally used for precision shooting or light machine gun, with a total weight of 567g, including a prism positive image sight with magnification of 4x (the same performance as ACOG), and can also reflect a red dot of 1.5moa. In addition, it has infrared laser indicator and infrared lamp with the same performance as the former
Another important change of sight is the redesign of backup sight. In the first generation of sample guns, the backup graation is etched in the sight, while in the second generation of sample guns, the graation is canceled and the traditional mechanical sight which can be folded and stored on the guard wood and handle is used as the backup sight. On the one hand, the soldiers participating in the test suggested that the traditional mechanical sight should be used as the backup sight. On the other hand, if the photoelectric sight was damaged and could not be aligned, the backup sight could not be aligned, so an independent backup sight was designedthe battery life of the sight has also increased from 110 hours to 400 hours, and the new design uses lever clamp instead of screw to fix the sight on the weapon, which is also a response to the soldiers' proposal to have a simpler installation method. In addition, the adjustment of wind deflection and height used to be made by a small wrench that is easy to lose, but now it can be adjusted by a 5.56mm cartridge case or a small coin. In addition, a small and clear click can be heard when adjusting the wind deflection and height. The control switch of the sight is moved from the original side position to the current back position, which makes it easier for soldiers to see and operate. The operation area of the control switch is also increased, and the "up and down" arrow is replaced by the "add and subtract" symbol
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