Shell

Take the CentOS system as an example to realize automatic database backup.1. Write a shell: 12 #! /bin/bashMysqldump -cp --user=root --password=' 123 ' dbName | gzip > ~/db/dbname -'date +%y%m%d%H '. SQL. GZ ;

Use the-e parameter of MySQL can perform various kinds of SQL (create, delete, add, erase, change, check) and other operationsUsageMysql-uxxx–pxxx-e "MySQL Command" Of course, you can also use the following notation MYSQL-E-uxxx–pxxx "mysql

1 Batch Create users:#!/bin/bashI=30Groupadd Class2While [$i-le 50]DoIf ID user$i &>/dev/nullThenecho "This user$i is exist"ElseUseradd-g class2 user$i && echo "User$i" | passwd--stdin user$i &>/dev/null && echo "This user$i is created"Fi((i++))Done2

Script 1#!/bin/bashdate=$ (date +%y%m%d%h%m) name=$ (echo $1 | awk -f ', '   ' {Print NF} ') Log_path= "$" if [ $# -ne 2 ];then    echo  "USAGE: sh  $0 log_name1,log_name2 log_path "    exitfifor NUM in " seq  1  $NAME ' do    log_name=$

If ElseRead-p ' Please enter the score: ' Scoreif [$score-lt 60]; Thenecho ' 60 points below ' Elif [$score-lt 70]; Thenecho ' 60-70 minutes between ' elif [$score-lt 80]; Thenecho ' 70-80 minutes between ' elif [$score-lt];thenecho ' 80-90 minutes '

Recently received the manager request to the RHEL7 LVM new partition expansion automation, because uses the virtualization platform, therefore uses to add the new disk the way to do:#!/bin/bash# #在线扫描新磁盘# #Step1: Recognize New hard

1. Purpose(1) Shell knowledge Summary. Good memory is better than bad writing, finishing the relevant shell knowledge and combining their own practical experience to organize, the content will not involve all the knowledge points, will only cover

The first is to create the shell daemon: (shouhu.sh)#!/bin/bashtest () {        while true         do                 ls ./  >> 123.txt                 sleep 5                              done}case $1 instart)         path= "/root/shouhu.pid"       

Defining variablesA=Assigning values to variablesA=5' Number equals $ ()[Email protected] ~]# hostnameLocalhost.localdomain[Email protected] ~]# a= ' hostname '[Email protected] ~]# echo $aLocalhost.localdomain${-} to determine whether the variable

Backing up MBR, root partition, boot partition#!/bin/bashBak_dir=/mnt #已挂载的移动硬盘或其他外设Mbr= ' fdisk-l |grep ' Disk ' |awk nr==1 ' {print $} ' |awk-f '/' ' {print $} ' |sed s/://g 'root= ' df |awk '/\//{print} ' |awk nr==1 ' {print $} 'boot= ' df |awk '/

The nature of the shell The shell of the Linux system is equivalent to the "one shell" of the operating system, which is the command language interpreter, which provides the user with an interface to use the operating system. It does not belong to

Original blog, reproduced please indicate the sourceThe shell is the command interpreter.See which shells are supported by this system1 Tab Command completionThis almost every time can be used, for example, I have a file called file.txt, assuming

Using SH to write small scripts can make the job easier. Part of the content may be more unfamiliar to everyone (at least I am).is the variable related to the expansion, the following are some simple description and use of the method. To make the

Add 20 users to the CLASS01 group in bulk, the user name begins with STD, ends with a number, format: STD01---STD20Method 1#!/bin/shgroupadd class01a=stdfor ((i=1;iMethod 2:#!/bin/bashgroupadd class01for i in {1..20}doif [$i-lt];thenuseradd "std0$i"-

#!/bin/bashRead-t 30-p "Please input user name:" NameRead-t 30-p "Please input user number:" numRead-s-T 30-p "Please input user password:" PassEcho-e "\ n"if [!-Z "$name"-A!-Z "$num"-A!-Z "$pass"]ThenY=$ (echo "$num" | sed-e ' s#^[0-9]# #g; s#[0-9]*

The head of the Sunset Building, the voice of the hung, Jiangnan wandering. The Wu hook to see, the railing shot all over, no one will, boarding meaning. --Deng Jiankang and Heart PavilionThe hill algorithm is a sort algorithm proposed by Hill

Q1. ArraysWe know that variables are memory space, each variable can only store a single data, a one-time assignment operation, then encountered some need to continuously store and read the task, if you still rely on the variable for multiple

1 /**2 * Run shell scripts3 * @paramShell scripts that the shell needs to run4 */5 Public Static voidExecshell (String shell) {6 Try {7Runtime RT =runtime.getruntime ();8 rt.exec (shell);9}Catch(Exception e) {Ten

#SIZE 10Direct Insert Sortvoid Insert_sort () {int i,j;int array[size+1];ARRAY[]={0,12,23,11,55,2,34,18,20,48,22};for (i=2;iArray[0]=array[i];J=i-1;while (Array[0]ARRAY[J+1]=ARRAY[J];j--;}ARRAY[J+1]=ARRAY[0];}}Binary Insert Sortvoid

#SIZE 10Direct Insert Sortvoid Insert_sort () {int i,j;int array[size+1];ARRAY[]={0,12,23,11,55,2,34,18,20,48,22};for (i=2;iArray[0]=array[i];J=i-1;while (Array[0]ARRAY[J+1]=ARRAY[J];j--;}ARRAY[J+1]=ARRAY[0];}}Binary Insert Sortvoid