what is shell scripting

value of a running process Renice-n PIDNohup SH executes scripts in the backgroundCtrl Z hangs a foreground processFG Job Number The file foreground runs the BG job number to run the file background/proc DirectoryShell Scripts Scripta shell script is a text file that contains a shell directiveShell and oh ah this supports variables with simple syntax to complete

Create a shell scriptWhen you create a shell script file, you must specify the shell to use in the first line of the file, in the format:#!/bin/bashCreate and execute SH scriptCode 1-1[Email protected]:/data# cat demo1 #/bin/bashdatewho[email protected]:/data# ls-ltotal 4-rw-r--r--1 root root Dec 1 13:59 demo1[email protected]:/data# chmod u+x demo1 [emai

included file test1.sh does not require executable permissionsRun a python script in a shell scriptTry to run the Python script in the shell script, if the Python script contains the shell's illegal statements, the above mentioned two methods are not possible, this may indicate that the above method is only for Shell

language that can easily interface with other domain, like python. the scripting language of Maya is to use Python, more play than Lightroom. Today, CommonJS Spec Wiki Might be a better choice than Python (node. JS is an implementation of COMMONJS), for reasons: JavaScript has a rich third-party library that covers fields that don't lose python V8/n

Tags: shell script1, write script/root/bin/systeminfo.sh, display the current host system information, including hostname, IPV4 address, operating system version, kernel version, CPU model, memory size, hard disk size#!/bin/bashecho "hostname: `hostname`"echo "ipv4 addr: `ifconfig |egrep -o "\2, scripting/root/bin/backup.sh, can be implemented to backup/etc/directory to/ROOT/ETCYYYY-MM-DD#!/bin/bashecho "co

Bash shell scripting Getting Started (ii)Use of the Read commandRole:Use read to assign the input value to one or more shell variables:-p Specifies the prompt to display-T TIMEOUTRead reads the values from the standard input, assigns a variable to each word, and all the remaining words are assigned to the last variableEx.read-p "Enter a filename:" FILE650) this.w

Previous Edit CommandA: Append data after the current cursorO: The next line of the cursor inserts dataDW Delete a Wordd$ Delete to end of lineDD: Delete Row, 5dd delete 5 rowsThe use of backspace and delete keys in normal mode is not recognized.10.1.4 Copy and pasteDD can be pasted with p after deletion.The copy command is Y,YW copy a wordy$ Copy to end of lineThen use p to paste10.1.5 Find Replacement: s

"Li Songyang writing"User= ' WhoAmI 'Case $user inRootecho "Hello root";;Teacherecho "Hello teacher";;*)echo "Hello $user, welcome"Esac echo "Date and Time: ' Day '"echo "This month's calendar: ' Cal '"echo "Machine Name of the machine: ' Uname-n '"echo "Current name and version of this operating system: ' Uname-s;uname-r '"echo "List of all files in the parent directory: ' ls '. /`"echo "Root is running all processes: ' Ps-u root '"echo "Variable te

Shell scripting improves Date//view dates and times-S change Time date-s "2015-08-20 14:27:12"View time Date + "%y-%m-%d%h:%m:%s"-D Change Single time Date-d "-2 Days" +%f+%w Show weeks+%w show how many weeks this yearntpdate //Calibration time ntpdate ntp.fudan.edu.cn use Fudan University server proofing time. Need to install NTP packagecal //view calendar of the month-y view calendar throughout the yearBu

Text processing commands for Shell scripting Learning notesA. Cut (truncate text characters or field fields)Command format: Cut [option] FileCombined use of 1.-d and-F to intercept fieldsDescription: * denotes delimiter, such as-,:, empty characters, etc.n Denotes nth fieldUsage One: cut-d*-fn to intercept a field from the text for each line that is delimited by

file is a script that is executed when the Linux system startsEdit the Inittab file (use the Vim/etc/inittab command to open the file)Example: Add a statement to the Inittab file to allow the system to execute a shell script file that checks the system disk when it starts checkdisk.shcheckdisk::once:/sbin/checkdisk.sh >/dev/console 2>1 indicates that this comman

, which is represented as a local variable. such as local temp=1 .Example 3. Array Parameterstest3.sh#!/bin/bash Span class= "hljs-comment" ># trying to pass a array variable function testit {local newarray # use ' local ' define a local variable newarray= (' echo " the NewArray value is ${newarray[*]} "}myarray= (1 , 2 , 3 , 4 , 5 ) echo "the original array is