Linux

Shell variablesWhen defining a variable, the variable name does not have a dollar sign (required for variables in the $,php language), such as:your_name="runoob.com"Note that there can be no spaces between the variable name and the equals sign,

1. View the list of services that are open at run Level 3:Chkconfig--list|grep 3:on2. Find a file of a certain type and calculate the total size.Find/-name *.conf-exec wc-c {} \;|awk ' {print $} ' |awk ' {sum+=$1} END {print ' sum= ', sum} 'Find

10.grep is a powerful text search tool in Linux systems. The main purpose is to search for key instructions, data, regular expressions, and so on.11. Open the soft keyboard: ctrl+alt+t, input onboard, if not installed this soft keyboard program,

Reprint: https://www.cnblogs.com/intval/p/5763929.htmlThe Linux system is controlled by the cron (Crond) system service. Linux systems have a lot of planned work on them, so this system service is started by default. In addition, because the user

First, build FTP service and configure the local Yum source of ftp:# mkdir /mnt/cdrom# mount /dev/sr0 /mnt/cdrom/    #  Mount the CENTOS7 CD # yum -y install vsftpd    #  install the FTP service # vim / etc/vsftpd/vsftpd.conf    #  Modify the FTP

First, modify the default boot interfaceMost users now default to the graphical interface, but this misses a good time to learn about the server startup process. We can go back to the command line interface with the relevant commands Init 2 back to

There are some differences between the interactive shell and shell scripts of Linux, mainly because of the existence of a separate running process, so there is a difference between the acquisition process PID.Interactive Bash Shell get process

1 Iftop:If you want to see what applications are currently in use, and how much bandwidth each application occupies, you can display them with iftop. The parameters used are as follows:-H Display this message-N don ' t do hostname lookups-N don ' t

Recently reload Linux system, but this time SSH Connection Cloud service Area Linux system, often appear for a period of time do not operate, the connection automatic interruption, show as the cursor is still flashing, but can not operate. Had to

Transferred from: http://blog.csdn.net/changliang7731/article/details/53074616In the previous chapter, we briefly introduced some basic principles of LCD. And, of course, more esoteric, like gamma,dither,hue,satuation. OSD and so on.We know we are

Nginx Basic ConfigurationNginx (engine x) is a Russian developed by an open-source web server software, Nginx can be used as a Web server support HTML and Php,nginx can also do reverse proxy, load balancingNginx using source package installation

This paper mainly introduces the operation flow of SD card to establish two partitions in Linux environment:Operating environment: Linux Ubuntu 2016.4Purpose of Operation: the SD card is divided into two partitions: the first partition format is

In the recommendation of seniors, I spent about half a month to learn the Zhang teacher's "Linux High Performance Server Programming" book. Read this book, feel this book in the breadth of knowledge is already very sufficient, on the network

File Find Directory1.locate2.findI. Locate locate命令基于数据库db，所以不能实时更新 他有如下的特点： 1.查找速度快 2.是模糊查找(可能搜到了文件，也有可能搜到了目录) 3.是非实时的查找 4.由于权限的原因可能只查找到一部分的文件 locate 参数： -i 不区分大小写 -n N 只列举前N个项目

The Man command is a help instruction under Linux, which allows you to view information such as instruction help, configuration file Help, and programming help in Linux.GrammarThe Man (option) (parameter) option is optional, but the parameter must

sudo introduction: sudo is a Linux system Management Directive, is a tool that allows the system administrator to let ordinary users perform some or all of the root commands, such as HALT,REBOOT,SU and so on. This not only reduces the login and

File Lookup and compression1. Using the Locate command2. Using the Find command3. Compression and decompression toolsThe locate and find commands are commonly used to find matching files on a file system, and locate is a non-real-time lookup

Linux Command EncyclopediaDirectoryLinux Command Encyclopedia ... 1Directory... 1I. Installation and landing commands ... 1Second, graphical interface related commands ... 2Iii. Information Display Command ... 3Iv. File processing commands ... 7Five,

Structure and usage of folders in linux (detailed) Structure and usage of folders in linux: /Bin: binary executable command. /Dev: special file of the device. /Etc: system management and configuration files. /Etc/rc. d: configuration file and script

Ubuntu resolution Adjustment Method and ubuntu resolution Adjustment 1. Enter xrandroid to obtain the current computer resolution information. Screen 0: minimum 320 x 200, current 1440 x 900, maximum 8192 x 8192VGA1 connected 1440x900+0+0 (normal