Shell

There is a ' batch ' file in DOS that writes multiple commands into a batch called. bat.In Linux, it can also be done, and more powerful, I write batch processing is in Ubuntu 12.04 LTSAll I have to do is move the pictures on the USB drive to the

Cat/proc/meminfoCat/proc/cpuinfoIpcs-aIpcs-mIpcs-sIpcs-qMkdir-p name when the parent directory does not exist is to create itINFOCMP VT100Echo $TERMXtermKonsoleGetconf Long_bitArchRelease= ($ (Lsb_releaseCD-RZ szecho $PS 1Ls-f (after the directory

Code block redirection refers to redirecting standard or standard output to a file within a block of code, or leaving the default state outside of a block of code, in other words, code block redirection refers to the redirection of standard input or

Automated Format Partitioning method ---- non-interactive --- available for scriptingTo give the user a hint first, let him select a partition to formatFor i in ' mount|grep '/dev/sdb ' |awk ' {print '} 'Dofuser–km $i; Umount $iDoneDD If=/dev/zero

Twenty. To get the system run data through the pipeline Combination shell command :1. Output the 5 most memory-intensive commands in the current system:#1) Lists all the processes that are running on the current host through the PS command.#2) The

#! /Bin/bash While[1] Do A = $ (ifconfig eth0 | grep'Rx PAC'| Awk'{Print $2 }'| Awk-F:'{Print $ NF }') Echo-ne"$ A \ r"# Refresh data without line breaks Done Echo Parameter number:-N. Do not wrap the line at the end.-E

Sed: A stream editor or a row editor. Sed processing process: sed reads a row from the source file and places it in a temporary buffer zone. This buffer zone is called a mode space and uses the corresponding mode to process the mode space, the

1. Single line comment: # echo "Hello World"2. Multi-line comment:: Tar cvzf $ databak_dir $3 $ date '. SQL' using databak_dir%3%date'.tar.gz '> 2> & 1SCP export databak_dir%3%date'.tar.gz '[email protected] "":/DIR # transfers backup files to

Tag: $ {} ''$ () Shell $ (), ''For command replacement $ {} Is used to replace variables (the following content is from shell 13) (1). Definition of Variables         $ A=B        $ echo $AB When executing this command, the AB is regarded as a

#! /Bin/bash # Determine whether the command line contains parameters with two file namesIf ["$1" = ""] | ["$2" = ""]ThenEcho "Please enter file name"Exit 1Fi # Determine whether the target file existsIf [-e $2]ThenEcho "the file already

(1) it must start with the following line (the first line of the file must be placed ):#! /Bin/shSymbol #! The program used to tell the system to run the script. This example uses/bin/sh. After the editing is completed and saved, it is assumed that

#! /Bin/bash # Prompt user input Echo-n "Please enter number" Read N # Put the input value into Variable N SD = 0 REV = "" On = $ N # Save the value of Variable N to the variable on for later use Echo "you put number is $ N" While [$ n-GT 0]

I. Regular Expression description · Concept: Describe data with common attributes with a string of characters · Note: when using regular expressions for matching, be sure to use the \ transfer symbol. · Format: A. grep [Option] 'regular expression'

After we grant the shell script execution permission, we can test the program. Assume that the shell script file is hello. Sh.In the/root directory. The following describes how to execute shell scripts on a terminal:1. Switch to the directory where

The problem is as follows: perform a loop based on the number of Script Parameters $ #, and output each parameter $1 $2 $3 in sequence ...... I have a loop variable I $ I. When I get this variable I is 1, I want to use this 1 and then call $1, that

Convex hull diameter Detailed description of convex hull diameter // Calculate the convex hull diameter. Input convex hull Ch. The number of vertices is N, which is arranged counterclockwise. The square of the output diameter Int rotating_calipers

#! /Bin/bash # program: # lzsh server log filter # History: #2014/07/01 Kom first release #2014/07/03 Kom remote and multi-Param support # Set pathpath =/bin:/sbin: /usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin :~ /Binexport path # Set Script

? Time when the file is read #! /Bin/bash For file in 'ls/root' Do Stat $ File> 1.txt Sed-n "7 P" 1.txt> 2.txt Usetime = awk-F ":" '{print $2}' 2.txt Echo "time =" $ File $ usetime Done ? The while statement that reads each row of a file. Cat afile |

Note: you must first install an email server such as Postfix or Sendmail. 1. Apache #!/bin/bash#apache.shnc -w2 localhost 80 if[ $? -ne 0 ]thenecho "apache is down,please check" | mail [email protected] -s "apache is

Time when the file is read #! /Bin/bash For file in 'ls/root' Do Stat $ file> 1.txt Sed-n "7 p" 1.txt> 2.txt Usetime = awk-F ":" '{print $2}' 2.txt Echo "time =" $ file $ usetime Done The while statement that reads each row of a file. Cat afile |