Tag：copy to
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Time：2021-7-19
Cold backup and hot backup of MySQL 1、 Cold backup (off, slow, point in time recovery) Cold backup occurs when the database has been shut down normally. When it is shut down normally, it will provide us with a complete database. Cold backup is a term for copying critical files to another location. Cold backup […]
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Time：2021-6-18
When you open Android studio, you are prompted to update the gradle version. After you click Update, it is stuck. Click the build tab at the bottom to stop downloading the new version gradle-6.5-bin.zip. You can see the download address of the new version of gradle. Use other tools to download the new versiongradle-6.5-bin.zip […]
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Time：2021-4-20
Object Can the object property be abbreviated? Declare an object, key and value can be omitted The above key must be a string. If you want to add a dynamic variable to the key (calculate the attribute name) Short for method ES6 can add asynchronous functions How to copy one object to another? —— Object.assign […]
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Time：2021-4-15
introduce The video recorded in this series is mainly on station BRust necromancer learning video Rust necromancer related source information ingithub.com/anonymousGiga/Rustonomi… primary coverage When initializing an array, let x = [Val; n] is used to assign the same value to each position, or let x = [val1, val2, val3] is used to specify the value […]
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Time：2021-3-11
1. Check which libraries are included in the GCC version. My version has been upgraded to 3.4.13 strings /usr/lib64/libstdc++.so.6 | grep GLIBC 2. Download higher version from the Internet, such as 6.4.0.Version download:http://mirror.hust.edu.cn/gnu/gcc/ wget http://mirror.hust.edu.cn/gnu/gcc/gcc-6.1.0/gcc-6.1.0.tar.gz tar -zxvf gcc-6.1.0.tar.gz 3. Copy gcc-6.1.0 to / usr / lib64. cp gcc-6.1.0 /usr/lib64/ 4. Delete libstdc + +. So. […]
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Time：2021-3-4
Configuration steps Servera server: [[email protected] ~]# su – usera [[email protected] ~]$ pwd /home/usera #Generating key pairs using RSA [[email protected] ~]$ ssh-keygen -t rsa Generating public/private rsa key pair. Enter file in which to save the key (/home/usera/.ssh/id_rsa): Created directory ‘/home/usera/.ssh’. Enter passphrase (empty for no passphrase): Enter same passphrase again: Your identification has been saved […]
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Time：2021-2-23
Step 1: Yum install httpd – y # install httpd service Step 2: systemctl start httpd Step 3: systemctl enable httpd # set httpd service to boot Step 4: firewall CMD — zone = public — add port = 80 / TCP — permanent ᦇ open port 80 of the firewall and […]
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Time：2021-2-11
Introduction of Rsync data synchronization service Rsync is an open source, fast, multi-functional, full-scale, incremental local or remote data synchronous backup tool, which is suitable for a variety of operating system platforms 1： Features (functions) of Rsync 1. Support to copy special files (such as link files and device files) 2. When copying, you can […]
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Time：2021-1-16
Building Dubbo and zookeeper environment under Windows Download Dubbo and war packages and jar packages Baidu cloud extraction code of Dubbo: cx7w Zookeeper download address Download a version you need Start zookeeper First unzip, and then go to the conf folder to add the zoo_ sample.cfg File, amend to zoo.cfg File, and then to the […]
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Time：2021-1-2
1. Why can’t NAND flash run the program directly NAND flash itself is connected to the controller rather than the system bus.The CPU operation mechanism is: after the CPU starts, it needs to take instructions for executionIf it’s SROM, nor flash, etc., the CPU can get instructions and execute them by sending an address […]
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Time：2020-12-21
The HDFS file system in Hadoop can dynamically add and delete nodes, which is easier to add. After configuring various XML files of Hadoop on the new node, you can start it directly. To balance the balance of each datanode node in the cluster, you can execute the balancer command in HDFS. The usage is […]
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Time：2020-12-19
1. Check which libraries are included in the GCC version. My version is upgraded. It was only 3.4.13 strings /usr/lib64/libstdc++.so.6 | grep GLIBC 2. Download the higher version from the Internet, such as 6.4.0.Version download:http://mirror.hust.edu.cn/gnu/gcc/ wget http://mirror.hust.edu.cn/gnu/gcc/gcc-6.1.0/gcc-6.1.0.tar.gz tar -zxvf gcc-6.1.0.tar.gz 3. Copy gcc-6.1.0 to / usr / lib64. cp gcc-6.1.0 /usr/lib64/ 4. Delete libstdc + […]
