Shell

Pipe symbol, Job control1. Pipe symbol | : Outputs a command to the following command execution[[email protected] ~]# ls111 1.txt 2_hard.txt 2.txt.bak.bak 4.txt apr-1.4.5123 1.txt~ 2_soft.txt 3.txt anaconda-ks.cfg.1

A file test is a test of whether a file or directory existsTest file format [operator directory or file] Note that there is a space between the opening parenthesis and the operator, and there is a space between the file or directory and the

Shell Introduction1. Other Shell:zsh,ksh[[email protected] ~]# yum list | grep zshzsh.x86_64 5.0.2-28.el7 installedautojump-zsh.noarch 22.3.0-3.el7 epelzsh-html.x86_

Put the app's log with the date name into the archive-specific directory (the log shaving is logging)Find $APPHOME/logs | Grep-v "Info.log\|debug.log\|error.log" | Xargs-i tar-cvzf-c/opt/logs/$DATE. tar.gz {}Date: date= ' Date +%y%m%d%h%m%s 'Find.

number of logged-in users: who | Wc-l See which users are logged on to the system : who Create a new file /bin/ct11, enter a command in the file,chmod Set the Execute permission for the file # cat >/bin/ct11W.H.O. | Wc-lPress Ctrl+d# Cd/

A Linux shell script Shell: command-line interpreter(1) SH(2) CSH(3) Ksh(4) Bash Shell script: A collection of commands that accomplish a specific thing Two run a shell script file 1. Add executable permissions, and then run the./shell script file2.

1, the database is fully prepared to the hard disk[[Email protected] scripts]$ cat rman_backup.sh  source /home/oracle/.bash_ profile  rman target / log=/home/oracle/backup/backupall_rman.log2. Incremental backup ScriptLevel 0

1. Create a folder script:#!/bin/bash#mkdirmkdir/home/img/pages/savedpictures/mission/xinlangweibo/$12. Query whether the folder exists:#!/bin/bash#find dirfolder= "/home/img/pages/savedpictures/mission/xinlangweibo/$1/" if [!-D "$folder"]; Then #no

Enterprise Practice Question 16:Enterprise Case: Write Network Service standalone process mode rsync system startup scriptFor example:/etc/init.d/rsyncd{start|stop|restart}.Requirements:1. To use the System function library technique.2. To use a

(a) Installation ideas(1) Source code compile Apache WEB Service(2) Source code compile MySQL DB service(3) Source code compiled PHP WEB service(4) Lamp Source Integration +php page creation(5) Optimization of shell scripts, introduction of

Shell after class summary High wavesArchive: Learning NotesDecember 4, 2017 13:31:08 Shortcut keys:Ctrl + 1 title 1Ctrl + 2 title 2Ctrl + 3 title 3Ctrl + 4 ExampleCtrl + 5 Program CodeCtrl + 6 Body Format

Shell: The command interpreter executes the corresponding command according to the command entered.See which shells are under the current system:Cat/etc/shellsView the shell that is currently in use by the systemEcho $SHELLCommon shell/bin/sh "has

Pipe characters and variablesOne, the pipe character and the job command1.txt |wc–l; Cat 1.txt|greap ' AAA 'The command for the pipe character is to give the result of the previous output to the following command2.ctrl z pause a task3.jobs viewing

nlShow file line numbernl myscriptPrintfformatting text%[-+]m.nx-The starting position from the beginning of the linem represents the width of the field and N indicates the maximum width of the fieldS: String.C: Character.D: number.X:1 6 binary

One, Shell scriptScript: Can execute the file, after running can implement some function (command stack, non-interactive)Standardize the general composition of shell scripts#! Environmental Statement (Sha-bang)# comment TextExecutable codeSecond,

Pipe character and job control; indicates that the previous command executes the next command in sequence[email protected] ~]# cat 1.txt |wc-l; Cat 1.txt |grep ' aaa '2AAAAAAAAAAAaqweaaaaaaaaa&&: The previous command is correct to execute the

Shell IntroductionThe shell is a command interpreter that provides interaction between the user and the machine, supports specific grammars, such as logical judgments, loops, and each user can have their own specific shellCentOS7 default shell is

Enterprise Actual combat Problem 8: How to implement the MySQL database for sub-library backup, please use the script to implementMy script

Introduction to ArraysBash provides only one-dimensional arrays, and does not qualify the size of the array. Similar to the C language, the subscript of an array element is numbered starting with 0. Gets the elements in the array to take advantage

Defining arraysArray name = (value 1 value 2 ...) Value N)[Email protected] ~]# array_name= (value1 value2 value3 value4)Reading an array${array name [subscript]}[Email protected] ~]# Echo"${array_name}"Value1[[email protected]-r3-srv ~]#