Linux

GDB1.GDB IntroductionThis chapter introduces a very powerful debugging tool gdb , you can completely control the operation of the program, so that the program is like a toy in your hand, let it go, call it to stop, and at any time can view all the

The previous article, the contents of the chat, or on the disk and partition.Today's content, the certificate refers to the "file system".For a "file system", which parts are composed of, and eachPart of the role of the relationship between them,

Purpose: Use the grep command to find a string that matches a condition in a fileFormat: grep "Options" "Find Mode" "File name"When looking for a string, you want to display the following:1) file name-------------------------grep displays the target

First, user and group of related files/etc/passwd  :  user and its attribute information file format:    root:x:0:0:root:/root:/bin/bash      Username: Password: uid:gid: Description Information: Home directory: Default shell #=======================

Between configuring Nginx reverse proxy We have to prepare two test servers, WEB1 and WEB2.1. Installing httpd[email protected] ~]# Yum install-y httpd[email protected] ~]# Yum install-y httpd2. Provide test page[[email protected] ~]# echo web1.test.

Involved/usr/sbin/ntpdate Time SynchronizationTzselec Choosing a Time zoneVi/etc/sysconfig/clock Clock configuration fileUse remote to use ntpdate time.windows.com sync time, Discover time is different from native timeSuspect is a time zone problem,

The role of ACL policies-Limitations of document attribution-Anyone belongs to three roles: owner, group, other person.-Unable to achieve finer controlACL Access Policy-Ability to set independent permissions on individual users, individual

01. RPM Package Naming rules = [package name]-[version number]-[number of software releases]. [Suitable for Linux platforms]. [Suitable for software platform]. [RPM Package Extension]Example: httpd-2.2.15-15.e16.centos.1.i686.rpm (package full

Linux directory structure/------------------------root directory/|-----bin--------------------------------/bin|-----Home--------------- --------------/Home |------------book-----------------------/home/book |------------Guest----------------------/

Time to modify Linux can use the date directiveThe function of the date command is to display and set the system date and time.Enter date to view the current system time.Modify time requires date-Functional character modified contentThe meanings of

System platform: Ubuntu12.04Creating desktop shortcuts under a Linux system can open apps faster. Here are three ways to summarize, but also to check some of the information collated, to share with you. By the way, after opening the application

A regular expression is just a notation, and the tool can handle a string of regular expressions as long as the tool supports that notation. Vim, grep, awk, sed all support regular expressions, it is because they support the regular, it is strong;

Way one: Write your own scriptWriting a script del.sh#！ /bin/bashTmp_dir= "/tmp/trash_tmp"MV [email protected] $TMP _dirchmod +x/home/scripts/del.shMkdir-p/tmp/trash_tmpchmod 777/tmp/trash_tmpVim. BASHRCAlias Rm= ' sh/home/scripts/del.shsource.

Http://www.51testing.com/html/48/202848-249774.htmlTime_wait too many workarounds for Linux and Windowshttp://m.sohu.com/a/122714498_412810Windows time_wait Too many workaroundsBath Dawn:is a problem with the configuration:Besides the need to

End other ssh login users in CentOS It is also necessary to limit the number of SSH connections and manually disconnect idle connections. Here, the process of manually picking other users in Linux is written. 1. view online users of the system [root@

Centos upgrade glibc (to version 2.17) 1. The previous glibc library version is 2.12 and must be upgraded to version 2.17. :http://ftp.gnu.org/gnu/glibc/glibc-2.17.tar.gzYou can select the desired version.2. installation and deployment[Root @

CentOS command -- dmesg 1. Command Format: # Dmesg (parameter) 2. command functions: Displays the boot information. The kernel stores the boot information in the ring buffer. You can use dmesg to view the information if you cannot view it at

CentOS cluster ssh password-free login configuration 1. Update the Hosts file Update the cluster node/etc/hosts file to ensure that all machines can access each other through hostname. 2. ssh Initialization Configuration [Plain] view plaincopy #

Common CentOS commands: find & Common shortcuts Common shortcuts Ctrl + u: Clear ctri + k: Clear ctrl + d: leave the terminal when this action is null. If it is not empty, delete a character ctrl + h: delete the character ctrl + e before the cursor:

Detailed explanation of CentOS commands (ps commands) The ps command is used to display information about the current process.1. Command FormatPs [parameters]2. Command Parameters -A: displays all processes. -N: displays all processes that do