Shell

MysqlMysql-h${hostname}-p${port}-u${username}-p${password}-E "SQL statement"-hlocalhost-uroot-proot customer-e "select * FROM Customer "> 1.txtReference article:Http://www.2cto.com/database/201410/343557.htmlShell Programming--eofhttp://blog.163.com/

------------------------------One of the shell versions used by Linux is the [Bourne Again Shell] abbreviated to bash. This shell is an enhanced version of the Bourne shell, developed under the GNU architecture.The first popular Shell[bourne

Medium brackets [ and the test command equivalent, the user Boolean judgment, such as:1 a='abc'2if'abc' ] 3 Then 4 " Yes " 5 Else 6 " No " 7 FiEquivalent to1 if ' ABC ' 2 Then 3 " Yes " 4 Else 5 " No " 6 FiWhen using [], be

First shell #!/Bin/bash echo "Hello world!" The "#!" fixed tag is used to specify which interpreter the script uses to parse the script and must have Execute permissions chmod+X./test.sh increased execution permissions./Test.sh executes the script

#!/bin/bashMkdir-p/data01/nginx_log/$ (Date +%y%m%d)cp/data01/nginx_log/access.log/data01/nginx_log/$ (date +%y%m%d)/access-$ (date +%y%m%d). log#先复制原来的正常访问日志Cat/dev/null

#!/bin/bashMkdir-p/data01/nginx_log/$ (Date +%y%m%d)cp/data01/nginx_log/access.log/data01/nginx_log/$ (date +%y%m%d)/access-$ (date +%y%m%d). log#先复制原来的正常访问日志Cat/dev/null

Getting Started with Shell programming~/.bash_history//root file path preserving the command history$HISTSIZE//History command variableSleep 100//Sleeping 100Sleep 200//sleeping 200CTRL + Z//pause command RunJobs//View tasksFG//Recall front DeskFG 2/

${STR-NEWSTR} is only replaced when STR is NULL${STR:-NEWSTR} replace when STR is null or if STR is an empty stringAll in all,-number, when STR has no content, then replace,: The number just increases the case of an empty string. Note that the

Some of the details of the shell are not very familiar with, borrowed a lot of other people's Things1. Word Frequency This problem is simple, as long as can be sorted can be cat words.txt |tr-s "" \ n "sort | unique-c | Sort-r | awk ' {print $ ' $ '

1:use ECHO-E Example Echo-e "n\np\n1\n\n+100m\nn\np\n2\n\n+1024m\nw\n" |fdisk/dev/vdb \ n represents a carriage return [Email protected] ~]# fdisk-l/DEV/VDBdisk/dev/vdb:8589 MB, 8589934592 bytesHeads, Sectors/track, 16644 cylindersUnits = Cylinders

Assigning values using read-in variablesParameters-P Setting prompt information-T set timeout timeHow to use:[Email protected] script]# read-p "pls input:" n pls input:12 [[email protected] script]# echo $n 12Special usage[email protected] script]#

--run. SH Job commandSh. sh--let Job run behind stageNohup ./.sh&--met error as below when rub. SH jobError ' XX.sh:line XX:sqlplus:command not found 'Method:source. Bash_profile--delete file,-f (delete directly without remaind)rm-f filename--delete

We use this when sqlplus interacts with the shell.Su-oracle-c "Sqlplus/as sysdbaSELECT * from GV ($instance);ExitEOF "This program does not seem to be a problem, the actual execution of the time will be error.Why?Because in this way, something in

-e filename true if filename exists-d filename If filename is a directory, true-F filename True if filename is a regular file-L filename True if filename is a symbolic link-r filename If filename is readable, true-W filename if filename is writable,

#!/bin/sh for in. /* do if test-d $p then touch $p ". Ok" if test-f $p "/busi.xml" then echo "Delete ${p}/ Busi.xml " rm $p"/busi.xml " fi for Z in $ (Find $p-name" *.zip ") do

Shell scripts are executed in various ways (source./*.sh,. The difference between./*.sh,./*.sh)Original source: http://blog.csdn.net/dance_rise/article/details/8573560Conclusion One: The/*.sh is executed in the same way as sh./*.sh or bash./*.sh,

  1 ################################## #######################################     2 # file name:  muscian.sh  3 # author: dty  4 # mail: [email protected ]  5 # created time: wed 05 aug 2015 04:41:14 pm  Cst  6 ######################################

Basic knowledge before learning shell scripts Chapter 2 LearningShellBasic knowledge before script In daily linux system management, shell scripts are indispensable. If you do not write shell scripts, you are not a qualified administrator. At

Linux shell reads the file line by line,Read File lines For Command replacement Code block redirection While Pipeline operator Code block redirection For IFS=$'\n'for line in `ls -l`do (( count++ ))doneecho $count Note:

Frequently used shell commands for updating Mac server services, and mac server shell commands On the Mac server, you must enable remote logon. Enable: system preference settings-> share check remote LogonCommon Commands include: Copy (copy the