Shell

Before constantly testing the Pgsql on VM VMS, it is still a bit cumbersome to install.So we collected a

For the new company, the company's leadership is very good. I feel more of the place is, their work efficiency is obviously higher than before. In the past will be very impatient for frequent changes in demand, now received after the demand will be

Loop of shell scripts: repeating commands1.for CycleGrammarFor variable name in variable Value listDoCommandDoneFor based on the contents of the variable Value list, executes the command repeatedly until all the contents of the Variable Value column

For n in ' seq-w ' do pass= ' echo $RANDOM |md5sum| Cut-c 2-9 ' Useradd test$n echo $pass | passwd--stdin test$n echo-e "test$n \ t $pass" >>/tmp/user.logdoneNote:The-W usage of seqGeneration of random numbersCUT-C: intercepts the specified range of

##!/bin/bashecho "pleases Enter A.txt file (enter Q to exit)"READ-DQ Aecho ""echo "pleases Enter B.txt file (enter Q to exit)"READ-DQ Becho ""Cat >/root/a.txt $AEofCat >/root/b.txt $BEofC= ' Cat/root/a.txt | Grep-f/root/b.txt 'D= ' Cat/root/a.txt |

This problem occurs because there is no configuration. Bash_profile problem, or we accidentally emptied or deleted the. bash_profile file.Method One: Modify the ~/.bash_profile fileThe steps are as follows:Vim ~/.bash_profile(No tube. Bash_profile

Words do not say much, straight to the subject, LZ is not bad at writing an article, just record their own learning process in a bit drops.Note: The shell is sensitive to case letters. Open terminal appears: [email protected]$ Span style=

1. Check the host network card traffic#!/bin/bash#networkWhile:; DoTime= ' Date +%m '-"%d" "%k": "%m"day= ' Date +%m '-'%d 'Rx_before= ' ifconfig eth0|sed-n ' 8″p|awk ' {print $} ' |cut-c7-'Tx_before= ' ifconfig eth0|sed-n ' 8″p|awk ' {print $6} '

Record a few simple examples of loop-related1. Wait for the expected content to be entered#!/bin/Bashuntil["$yn"=="Yes"-O"$yn"=="YES" ] DoRead-P"Please input yes/yes to stop this progras:"yn DoneEcho "ok! You input the correct answer."Wait to enter

Http://www.linuxidc.com/Linux/2012-04/59093.htmPeople often write and use makefile, makefile often use the shell, but some of them need to pay attention to the place is not necessarilyWill pay attention, here are listed a few come, do not know

LS-LH //view file sizeLS-LH filename //View the actual size of a filedu-h //Viewing the size of a file as a diskdu-h filename //View the size of a fileThat LS looks at the actual size of the file, Du is looking at the size of the disk blockDu

Creation and execution of a script1. Create file *.sh, file suffix sh2. Editing scriptsThe first line must be: #!/bin/bash #指定解释脚本的shell3. Empoweringchmod u+x a.sh4. Implementation./a.shVariables in the two shell scripts1. Definition and deletion of

Environment:Operating system: ArchLinux; Terminal Simulator: Rxvt-unicode (URXVT); Shell:bash;The background process referred to here is a ampersand (&) behind the command line, and the foreground process is the form of a command line that does not

1. Piping "|"ls | Cat-n > OUT.txt2. Child shell2.1 Child Shell DescriptionYou can use the () operator to define a child shell in a shell script#/bin// ; ls) pwdExecution results　　Description: Does not have any effect on the current shell when the

The most recent thing about egg aches is that you need to get root in the shell script, so you need to enter a password when the shell script is running.Lazy I certainly want to let the shell in the execution process can automatically enter the

Implementation requirements: Create user student1 to Student50, specify Group as student group! And each user needs to set a different password! The script is implemented as follows:#!/bin/bashfor i in ' seq 1 "do useradd-g student student$i; echo

1. Basic Shell Syntax: (Hello,shell)#!/bin/bashecho"Hello,shell! "The results of the operation are conceivable: Console output:Hello,shell2.Shell variable definitions and references:#!/bin/Bashvalue="hello,shell"echo $valueRunning Result:

This article mainly describes how to use bash to implement a basic thread pool.1. Pre-knowledge {}& in Linux means the entire block of code is put into the background execution The wait Wait command indicates that all background

The essence of the hill sort is the grouping insert sort, which is also known as narrowing the incremental sort.The basic idea of this method is that the whole sequence of elements is divided into several sub-sequences (consisting of elements

This note is for the early ximo of the shelling Basic video tutorial, organized notes. the tools used in this note:http://download.csdn.net/detail/obuyiseng/9466056Exe32pack1.ESP Law1, the program loaded into the OD, found that there is a large