The 2>&1 of Linux

Reprinted from: Http://blog.sina.com.cn/s/blog_5842daa30101enz5.html often concerned about the Linux script people, must have seen 2>&1 such usage, At first it must not understand the meaning and why it is such a combination. Yesterday happened to

Linux Common commands

Ls-al Show properties for all filesPWD Displays the current pathCD Directory switch directoryCD/Return root directorymkdir Creating a FolderTouch Create FileCat File View FileRM-RF file Delete files or foldersMV Move or renameCP Copy FileVI File

Modify Linux File Permissions command: chmod

Each file and directory in a Linux system has access permissions, which are used to determine who can access and manipulate files and directories.Access to a file or directory is divided into read-only, write-only, and executable three types. As an

How to change the permissions of a read-only file for a Linux system

Vim Editor can be entered in command mode: wq! Save ExitYou can modify file permissions with the chmod command.The chmod command is very important for changing the access rights of a file or directory. Users use it to control access to files or

Operation of the SH file under Linux

First, direct./plus file name. SH, if running hello.sh for./hello.sh "hello.sh must have x permission"Second, direct sh plus filename. sh, such as Run hello.sh for SH hello.sh "hello.sh can have no x permission"1 , CD to. sh files in the same

Dahne-linux Foundation-day04

To view the contents of a text file:Cat: Suitable for viewing files with less content.Less: Suitable for viewing files with more content. When the file content is more, from the first line display, press SPACEBAR to page, press Q to exit.To view the

Linux Series tutorial (vi)--linux file Search command

Previous Blog We explained the Linux Link command and Rights Management commands, through the LN-S link name to create a soft link, no-s means to create a hard link, there are three changes to the permissions of the command, chmod command can change

Linux under binary package, source code package, RPM package

Reproduced in: http://www.cnblogs.com/cj2014/p/3728324.htmlLinux under binary package, source code package, RPM packageMainly available in three formats MySQL package: RPM format, binary format, source format: (Tar package, GZ compression)RPM Format:

Linux basic commands

One, view directory and file commands CD Change Directory (1) Cd/usr/bin(2) Cd. (.: current directory,...: top-level directory )(3) CD/(4) Cd ~ ( user home directory )2.ls Listing Directory contentsContents: Blue, plain file: Black,

Day08-linux Permissions

last learned to organize the basic operation of the Linux documentation, today we learn the permissions under Linux:1. Permissions for files or directories chmod:Chmod is mainly used to modify the permissions of files and directories, the main

Linux environment variable CP MV and several commands for document viewing

1. Environment VariablesIn the literal sense, the environment can be understood as the environment of the entire Linux system, while the variables are either a variable amount or a command.Then, we can understand the environment variables for Linux,

Linux environment variables, cp,mv command, More,less,cat,tail,head, use

Linux environment variables, cp,mv command, More,less,cat,tail,head, use[Email protected] ~]# cp/usr/bin/ls/tmp/[Email protected] ~]# path= $PATH: Use of/tmp/path[Email protected] ~]# echo $PATH/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/

Linux Traffic Monitoring Tool (Iftop)

In Unix-like systems, you can use top to view information such as system resources, processes, memory consumption, and so on. View network status You can use Netstat, nmap and other tools. To see real-time network traffic, monitor TCP/IP

Linux cluster--lvs

The following describes the Linux clusterFirst, the Linux cluster Foundation1. Linux cluster type: LB, HA, HP, DS(1), LB: Load Balancing clusterDefect: A single point of failure, its scheduler can become a performance bottleneck(2), HA: High

Date usage of Linux

Display time is a common command, and it is often used in writing shell scripts to display date-related file names or times. The date command is both Linux and Windows.The use of the date command under Linux Date [OPTION] ... [+format]

Linux usermod command, user password management, mkpasswd command

Usermod Commandusermod Command is a command to change a user's properties, Usermod Similar to the usage of useradd, there are several uses of this command: u sermod  -u number username   change the user's uid user1 user's uid 1

PMA module details, restrictions on user login to Linux, password modification restrictions, etc.

Pam Detailed Introduction2014-04-02 09:26:41Tags: Pam original works, allow reprint, please be sure to use hyperlinks in the form of the original source of the article, author information and this statement. Otherwise, the legal liability will be

Command prompt and command format description for Linux systems

Start using CentOS:Command prompt:650) this.width=650; "Src=" https://s5.51cto.com/wyfs02/M01/A7/10/wKioL1ngKUOBsHRKAAAKntIq2Mw744.png-wh_500x0-wm_ 3-wmp_4-s_3996843202.png "title=" 1.png "alt=" Wkiol1ngkuobshrkaaakntiq2mw744.png-wh_50 "/>[Email

The Linux version of the free face recognition technology.

Rainbow Soft recently launched the free Linux version of the Face Recognition SDK engine, which after its release of the free version of Windows, Android, iOS, a very commercial value for small and medium-sized enterprise version, as the ideal

Linux and Windows Interop files, user profiles and password profiles, user groups and user management

Linux and Windows inter-pass files User profile and password configuration files User Group Management User Management 2.27 Linux and Windows interop files want to enable Linux and Windows to pass files, you can use Xshell, but

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