Shell

1. Use a command to find the files that have been modified in the last 24 hours in the/etc/directory, and the suffix name isthe. log file and delete it.Find/etc-type f-mtime-1-name "log* "-exec rm-rf {} \;2. From the Test.log file, find the row

One: Shell introductionThe shell is a command interpreter that provides interaction between the user and the machine, supports specific syntax, and each user can have his or her own specific shell,centos default of bash, and Zsh,ksh.Two: Command

8th Shell Programming Character Menu ManagementI. Shell function definitionFunction menu () {Echo ' This is a func!! ';}Two. Shell functions useMenuThree. How to use the Cat command HeredocCat

#!/usr/bin/bash#jumpserverTrap "" HUP INT ouit TSTPClearWhile:DoWebserver=192.168.117.101mysql=192.168.117.102Cat 1.WEB2.MYSQLEofRead-p "input number:" numCase ' $num ' in1) SSH [email protected] $webserver;;2) SSH [email protected] $mysql;;*) echo "

#!/usr/bin/bash#########################################memory used#v1.0 by LIXIN 20180605########################################Mem_used=free -m |grep ‘^Mem‘ |awk ‘{print $3}‘mem=free -m |grep ‘Mem‘ |awk ‘{print $2}‘mem_usage=$

When operating on SECURECRT, do the following carelessly:?????????????????? [[email protected] ~]# echo "Alias rm= ' echo this command does '" ">. Bash_profile?????????????????? [[Email protected] ~] #source. bash_profile?????????????? When the

1. ExercisesFor a file, 1 to 5 lines delete the line with English, 6 to 10 lines delete the English characters inside;2. AnalysisThis requirement, with the SED command can be solved, mainly used to match the knowledge of replacement.3. Scripts#！/bin/

Plugin: django-extensionsdjango-extensions==1.9.8PIP3 Install Django-extensions1. Database shell commands (under project directory)Python3 manage.py DbshellExecute SQL statement2. View the SQL statements for the Django

1. (1) Change the main prompt to the user's home directory name (hint: reference material 4.6.8 section environment variable PS1 and HOME usage)(2) Assign the string DOS file c:>\ $student \* to the variable x and display it (hint: note the choice

File header#!/bin/shBasic syntax:Define variables:Your_name= "Aivy"In addition to explicitly assigning values directly, you can also assign a value to a variable using a statement: for file in ' ls/etc ' or for file in $ (LS/ETC)The above statement

The For loop syntax is structured as follows [[email protected] tmp]# cat 1 . sh # !/bin/bash for i in ' Seq 3 " do echo $i done [[email protected] tmp]# sh 1 . sh 1 2 3 Bulk Modify file name [email protected] tmp]# ll

I. OverviewYou can pass parameters to the script when you execute the Shell script, and the format of the parameters obtained in the script is:$n. n represents a number, 1 is the first argument to execute the script, 2 is the second argument to

Analyzing Nginx Access Logsawk ' {a[b[$1]++]}end{for (I=length (a); i>0;i--) for (j in B) if (b[j]==i) {c++;if (c ' Www.dwhd.org_nginx.logThe effect is as followsSort statistics in reverse orderCat Access.log| Sort| Uniq -c| Sort 1 -n-rUniq only the

Shell Command Application Exercise(1) The use of the following documents is briefly reviewed through the Help information①/ETC/PASSWD (Hint: View this file description description via man 5 passwd)②/etc/shadow (Hint: View this file description

| The operator pipe symbol is a very powerful feature of UNIX, and the symbol is a vertical bar: "|".Usage: Command 1 | Command 2 His function is to pass the result of the first command 1 execution as input of the Command2 to command

/ETC/PASSWD Purpose: This directory stores the operating system user information, which is visible to all users. Consists of 6 semicolons consisting of 7 information, user name, password (encrypted), UID (user ID), GID Group ID, user's full name or

8.6 Pipe symbol and job controlPipe break: The data from the previous command to be output to the screen as the standard input of the latter commandJob Control: When you run a process, you can use CTRL + Z to pause it, then the FG (foreground)

Script[[email protected] shell]# vim while2.sh#!/bin/bashi=6while [ $i -gt 0 ]do i=$[$i-1] echo $idoneExecution results[[email protected] shell]# sh while2.sh543210Script[[email protected] shell]# vim while1.sh#!/bin/bashload=`w|head -1|awk -F

Format 1:if condition; Then statement; FiScript if1.sh[[email protected] shell]# vim if1.sh#/bin/basha=5if [ $a -gt 3 ] then echo okfiExecution results[[email protected] shell]# sh -x if1.sh+ a=5+ ‘[‘ 5 -gt 3 ‘]‘+ echo okokFormat 2:if

1. Script test.sh, placed in the/users/hdwang directory#!/bin/sh/users/hdwangechols: 'ls'for (( i=1; i; i++)); Do Echo $ (expr31); Sleep 1s Done echo JPS: ' Jps-l '2.java Execution test.sh Public classExecshell { Public Static voidMain (string[]