Linux

The Linux Export command is used to set or display environment variables.When executing a program in the shell, the shell provides a set of environment variables. Export can add, modify, or delete environment variables for use by subsequent

Single quotes:All special characters in single quotes have no special meaningDouble quotes:In double quotes $ ' \ Three characters, call variable value, reference command, Escape, other special characters have no special meaningAnti-quote:The

Process Management 1. View process Ps-efps-aux top-d 1 time interval 1 seconds default 3 seconds-P XX View the process information for the specified PID 2 . End Process Service Management  CentOS 7.0 1. Start shutdown systemctl start

Common Linux System ServicesThe Linux system contains a large number of service programs that have RC scripts to start or terminate according to the preset state when switching the runlevel. Some of these system services may not be required by the

Cloud InstallationYum Install SubversionConfiguration1. Configure the Warehouse[[Email protected]/]# CD//home/svn[[email protected] home]# ls svnconf db format hooks Locks README.txt2. Configure password[Users]test1=123456test2=1234563.

1. See if Linux has crontab instructions if no crontab instructions are installedYum install-y vixie--y install Crontabs2. Set Boot345 Crond on3. Parameters-e Edit the user's timer settings. -l lists the user's timer settings. -R removes the user's

The Linux boot process is divided into 2 types, init mode and SYSTEAMD mode.First say init startup process:1. First, start the power supply.2. Start the post (power on the Self test), the power-on-test program, check the motherboard hardware on the

File: Deciding the type of filesFile system:Rootfs: Root file system/boot: System boot related files, such as kernel, INITRD, and grub (bootloader boot loader)/dev: Device filesDevice files:Block devices: Random access, data blocksCharacter Device:

IntroductionThe simple definition of tcpdump is: The dump the traffic on a network, based on the user's definition of the packet interception of packets on the Data Packet Analysis tool. Tcpdump can intercept the "head" of the packets that are

1. Find a file:Exact find: Find/(range)-name FileNameFuzzy Lookup: Find/(range)-name ' *filename ' (using wildcards to find all files with the suffix named filename)Find/(range)-name ' filename* ' (use wildcards to find all files with the prefix

I. Remote management of Linux servers using OpenSSHSSHD is the server-side daemon of OpenSSH, and its corresponding Windows client software is Securecrt/xshell/putty and so on.OpenSSH is generally installed by default on Linux systems and the

setfacl -m u:username:rwx dir/file-m：添加或者修改u[设置用户]:username[用户名]:rwx[设置权限]g[设置组]:groupname[组名]:rwx[设置权限] setfacl -m u:username:r -R dir#同时设置子目录下的权限-R : 递归设置子目录下的权限setfacl -x u:username dir/file#删除用户的权限setfacl -x g:groupname dir/file#删除组的权限setfacl -b 

This article transferred from: http://www.centoscn.com/image-text/install/2014/0812/3480.htmlFirst, installation PreparationFirst, because some of the Nginx modules rely on some Lib library, so before installing Nginx, you must first install these

FirewallHardware firewallSoftware firewall:Application Layer FirewallNetwork layer firewall: Linux packet filtering firewallLinux Packet filtering firewallNetFilter: Packet filtering system in the Linux kernel, called "kernel State" of the Linux

Linux Command Line-command line Quick Start and command line Quick Start Man mannual page reading Manual Apropos find what man page is appropriate find the appropriate manual page Env look at your environment view environment Echo print some

In Linux, the problem of invalid Del key and return of sqlplus in Oracle is solved. A good solution. The problem has been solved. Solution Using rlwrap   1. Install the rlwrap and readline Libraries You can use the yum source of EPEL to directly

Linux Learning Record 3 (Vim document Editor), linuxvimAll Unix Like systems have built-in vi file editors. Other file editors do not exist. vim is an upgraded version of vi and has the ability to edit programs, the correctness of the syntax can be

Linux: curl, linuxcurl [user@localhost ~]$ curl -hUsage: curl [options...] Options: (H) means HTTP/HTTPS only, (F) means FTP only --anyauth Pick "any" authentication method (H) -a, --append Append to target file when uploading

Install zabbix3.2.4 and centos7zabbix3.2.4 on centos7 System: CentOS Linux release 7.2.1511 (Core) Zabbix: 3.2.4   1. yum-y install httpd mysql-server mysql-devel php-mysql php-common php-mbstring php-gd php-odbc php-pear curl-devel net-snmpnet

Centos operating system installation on the Virtual Machine VMware, centosvmware1, download centos operating system, provide Baidu cloud disk link: http://pan.baidu.com/s/1pLHOR03  2. Open the new blank virtual machine created in VMware in the