Linux

Gyt_box is a specially developed for the ARM Linux platform based on the Qt graphics interface system testing tools, to provide some common peripherals testing and calibration functions, system settings, monitoring and other functions.The "gyt box"

The VI is the most powerful text editor in the terminal command line, but it needs only the text editing function, and the integrated application of GCC, make and so on is not needed now, so it is not very difficult to operate, so the habit is good.

Check JDK version, uninstall OPENJDK version (JDK and openjdk differences do not repeat here) Check the java–version, javac–version command view version first (figure I) After checking JDK version 1.7.0.45; then enter Rpm-qa|grep Java view (figure

First download the Linux version of JDK files on the website Then store the downloaded files in the Linux directory Create a new directory under/USR/java1.cd/usr2.sudo mkdir JavaAccess to downloaded JDK directory via CD command1.sudo tar zxvf

One, can be reentrant function: Reentrant functions Follow the following three features. 1. A function cannot use any static or global variable that is not const. This is a better understanding, shared variables to ensure that can not be modified,

md5sum is the command used to compute and verify the MD5 value of a file (the MD5 full name is an algorithm for digest (Message-digest algorithm 5)). It is quite convenient to use, when we download some files from the network, especially the system

Command 1:ls Original intent: List Features: Displaying catalog files Syntax: ls-a display all files, including hidden files Ls-l Detailed information display Ls-d View Directory Properties Example: Ls-l/bin Drwxr-xr-x 2 root 4096 13-01 01:23 File

1. Download WebSphere MQ7 tar.gz from IBM 2. Create a WebSphere MQ required file system Mkdir/opt/mqmMkdir/var/mqm 3. Creating MQ Users and user groups Groupadd MQMuseradd-d/var/mqm-g Mqm-g MQM MQMpasswd MQMVi/etc/group Find MQM:X:1003:MQM Add ",

In the experiment class, I contacted Linux and wrote a command on the Linux that I learned here. Experiment name the establishment of embedded development environment Experiment Objective based on PC virtual machine installation familiar with Linux

Common Operations system Commands View Host Namehostname Modify host name (invalid after reboot)hostname Yang Modify host name (permanent after reboot)vi/ect/sysconfig/network Modify IP (invalid after reboot)ifconfig eth0 192.168.12.22 Modify IP

Some common compressed files: *. Z Files compressed by Compress program *.bz2 Files compressed by bzip2 program *.gz GZIP Program Compressed Files *.tar The TAR program is packed with

Loop deviceLoop deviceOne. Reference commands[Email protected] a]# LosetupUsageLosetup Loop_device # Give infolosetup-d Loop_device # DeleteLosetup-f # Find UnusedLOSETUP-A # list all usedLosetup-r # Read-only LoopLosetup [-E encryption] [-O offset]

1. Use the DF-HL command to see if the mounting space is sufficient;2. Use the top command to view memory operation;You should also use the FREE-M command:[Email protected] ~]# free-mTotal used free shared buffers Cachedmem:2013 1661 352 0 223 1206-/

>>>sort commands Common related options: Options Description -C Checks to see if the file order is sorted, and if it is out of order, it outputs information about the first scrambled row, and then returns 1

Linux add Users (user) to user groups (group)Add a user to a user group and never use it directly:Usermod-g GroupaDoing so will allow you to leave the other user groups, just as members of this user group Groupa.Should be added with the-a

2nd Chapter PS1 (environment variable)Variable: x+y=10 known x=11 y=?Environment variables: Features uppercase meaning (can be used in most places in the system meaning basically unchanged) system creation PS1 ===== martial

First, display Chinese garbled troubleshooting and solutions1. The system character set does not match the Xshell character set2. TroubleshootingXshell the character set is not UTF-8, modifyXshell the character set is UTF-8, continue troubleshooting

1th. How to solve and troubleshoot Linux display Chinese garbled characters1.1 Garbled reasonThe character set of the Linux system is different from the character set of the remote Connection tool1.2 Troubleshooting(1) Viewing the system's character

Mycat IntroductionEnterprise application Development "big database Cluster" Support transaction, ACID, can replace MySQL's enhanced version of the databaseAn enterprise-class database that can be considered a "Mysql" cluster to replace expensive

Linux System Tuning Guide (CENTOS7. XWelcome to follow my latest blog address: https://owelinux.github.io/Turn off unnecessary services (such as print services, etc.)for owelinux in `chkconfig --list | grep "3:on" | awk ‘{print $1}‘`; do chkconfig