Shell

I rookie a, first contact with the Linux shell script;Shell script, the simplest function is to write a lot of instructions together, so that users can easily be able to execute multiple commands, and shell script provides arrays, loops, conditions

Common shell variables are: custom variables, environment variables, positional variables, predefined variables, and so on.Variables: Can be stored in a variable value of space, can be changed by different environments, is a variable value. Echo

1, first understand the Shell's basic framework650) this.width=650; "src=" Http://s4.51cto.com/wyfs02/M00/83/46/wKioL1duhrXze92MAAAmKDBM0i0805.png "title=" 2016-06-25 21-26-40 screen. png "alt=" Wkiol1duhrxze92maaamkdbm0i0805.png "/>As shown[User

grep toolThe shell command line is convenient and the tools it supports are inseparable, and the grep tool is a search artifact that can search all the information in all the files in the entire Linux system.The flexible use of grep is inseparable

1. BackgroundWhen it comes to shell programming, we have to mention regular expressions, the "old guy" that can look like a new programming language, and let a lot of our just-in-the-box programmers love and hate because they can actually write

#Dialog +shell IntroductionDialog+shell combined use, square can reflect the effect of Dialog graphics, in the operation of the time, the use of graphical interface, you can give you a more intuitive feeling, I believe you will like his 650)

Ask for 1-100 and A. Non-recursive1 #!/bin/bash 2 sum=0 3 str= "" 4 for I in {1..100} 5 does 6 let sum+=i 7 str+= "$i +" 8 done 9 echo ${str%+}= $sumOutput Result:650) this.width=650; "src="

#需求Original content 10.221.29.30 modified: qq1-5f ansible_ssh_host=10.221.29.30Original content 10.225.32.75 modified: qq6-10f ansible_ssh_host=10.225.32.75Original content 10.221.249.127 modified: qq11-15f ansible_ssh_host=10.221.249.127#文件展示[Email

#需求Write a backup script that backs up Samba files for 20 days#!/bin/bashdir= "/samba/operations" backup= "/data" filename= "operations.tar.bzip2" date= ' Date +%y%m%d ' [!-e "$dir"] && echo "Please contact admin" && exit[!-e "$backup" && mkdir

1, 1-100 number summation① non-recursive methodShell650) this.width=650; "src=" Http://s1.51cto.com/wyfs02/M02/83/0B/wKiom1dpIcHBcRrUAABevxRp8l8674.jpg "title=" Sum1.jpg "style=" Float:none; "alt=" wkiom1dpichbcrruaabevxrp8l8674.jpg "/>Operation

echo command: Used primarily for output in the shell 1.-N does not wrap the display result (by default, the line is wrapped) 2.-E "" supports using some special characters in double quotesThe usual special characters are\a a warning sound; \b

Linux Shell Process Control Guide Unlike the Java, PHP, and other languages, the Linux shell has its own process control statements, including conditional statements (IF), loop statements (for,while), and SELECT statements

Implementing a progress barmy_pb.sh650) this.width=650; "src=" Http://s5.51cto.com/wyfs02/M01/83/18/wKiom1dqlG6gHCYgAAA-1PyY3TI655.png "title=" Image.png "alt=" Wkiom1dqlg6ghcygaaa-1pyy3ti655.png "/>Run results650) this.width=650; "src=" Http://s2.51

An efficient development environment is undoubtedly of great help to our daily work, and time is saved by these tiny details.Next, I'll show you how to configure ZSH+INCR to create the ultimate and efficient development environment.First, let's look

Next: Start the ultimate efficiency Shell Tour (1), and then I'll introduce another useful plugin for Oh my zsh:Zsh-autosuggestionsThe function of the plugin is to display the input History command, a very sharp feature!!The configuration method is

Skillfully using the delimiter delimiterWhere to enter large pieces of textAutomatic selection and entry of placesAccessing the database[Email protected] ~cat > OUT.txt EOF> 123jl412 3> o> EOFTool Usage TipsUniquely identifiesDate: Creates a log

Monitoring Programspeeking at the processesWhen a program runs on the system, it's referred to as a process. To examine these processes, your need to become familiar with the PS command, the Swiss Army knife of utilities. It can produce lots of

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Exercise one: Write a simple progress bar with a shell scriptThe code is as follows:650) this.width=650, "title=") ho7oa}6@[z~ @MTZJH2YZ (x.png "src=" http://s3.51cto.com/wyfs02/M00/82/F1/ Wkiom1dmv0nzcwgdaabjd93_rgs506.png "alt="

Create loops in shell scripts to append echo content redirection to a file650) this.width=650; "Src=" Http://s1.51cto.com/wyfs02/M01/82/E7/wKioL1dj6XHwzJ-tAAAoItNjmwc457.png-wh_500x0-wm_3 -wmp_4-s_2295541797.png "title=" qq picture