Shell

Note This article compiles from the Commandlinefu.com series article top Ten one-liners from Commandlinefu explained. As a Web site recommended by the user as the most useful shell command, it records tens of thousands of shell commands, some of

Http://www.cnblogs.com/chengmo/archive/2010/10/23/1858879.html In daily life, random numbers are actually often encountered, want to throw dice, lottery, and draw lots. Oh, very simple can be achieved. So in doing programming, really to design a

Http://www.ha97.com/4021.html 1. Delete 0-byte filesFind-type f-size 0-exec rm-rf {}; 2. View processArrange by memory from large to smallPS-E-O "%c:%p:%z:%a" |sort-k5-nr 3. By CPU utilization from large to small arrangementPS-E-O "%c:%p:%z:%a"

The shell script automatically telnet and executes the script simple usage of the remote machine [plain] #!/bin/sh (sleep 10;    echo "username";    Sleep 10;    echo "Password";     Sleep 10;    echo "PWD";     Sleep 50; #echo exit) |telnet $ip

how Shell arrays operate number of array elements ${#array [@]} all elements of an array ${array[*]} string length ${#str} 1, get the number of elements of the array: array= (Bill Chen Bai Hu); num=${#array [@]}///Get the number of array

The company does not have fixed IP, need to test the third party asynchronous callback interface (third party server How to find the company intranet machine); Baidu Search for "intranet penetration" results are mostly peanut shells, but this

The problem is:4) Known: The content of/etc/hosts is 192.168.1.11 oldboy11.etiantian.org 192.168.1.21 oldboy21.etiantian.org 192.168.1.31 oldboy31.etiantian.org #192.168.1.111 oldboy111.etiantian.org Please use the shell script to realize, how can

-S file file is somefile 0 o'clock [f]: Determines whether it is a file [- X "/bin/ls"]: Determines whether/BIN/LS exists and has executable permissions [-n "$var]": Judge $va 　　　　　R variable has a value ["$a" = "$b"]: To determine if $a and $b

The difference between Su and Su- The former only switches identities, but the shell environment is still the original user's shell, while the user and the shell environment switch to the new user. The PATH environment variable error will not

Today, the script on the company server to get its own notebook on the run error, set-x tracking discovery is a variable in the self-increase operation error occurred, the error section of the script is probably like this: #! /bin/sh param=0

Http://www.cnblogs.com/davidwang456/p/3784102.html http://blog.csdn.net/yucan1001/article/details/8455757 http://blog.163.com/yangfan876@126/blog/static/806124562013720104712282/ 1, dirs1) functionDisplays all records in the current directory

There are two ways to let echo output a color 1. Define the color variable in the shell script and use ECHO-E to invoke the variable 2. When defining variables, define the ECHO-E into a variable, and then output the variable Shell script that allows

use of string comparison X "$variable" in Shell This article refers to StackOverflow why does shell script comparisons often use X$var = Xyes? do not use double quotes "", do not use prefix x do not use double quotes "", use prefix x use double

The set command sets the parameter variables for the shell. The output of many commands is a space-delimited value, and using set is very effective if you want to use one of these data fields. #!/bin/shecho the date is $ (date)Set $ (date)echo the

A program that often needs help explaining. The ways to activate help instructions are described in two ways 1. The simplest way is to discriminate by the number of parameters. For example, displays the help description without any parameters. 2.

Http://www.cnblogs.com/wangkangluo1/archive/2011/09/23/2185938.html Name: PSUsage rights: All usersHow to use: PS [options] [--help]Description: Shows the dynamics of the instantaneous stroke (process)Parameters: The parameters of PS are very many,

Transferred from: http://www.cnblogs.com/penghong2014/p/6065838.html 1. First download historian.py script, download address: Https://github.com/google/battery-historian2. Unzip the download and go to the

Some time ago in the study shell script, the last mention of the SED mode space and maintain the concept of space, but has not studied well, these two days studied, so it sent, not very comprehensive, just for your reference. Keep the space sed

This article demonstrates how to use a shell script to complete adding a user, first making a decision if the user exists, prompting the user to already exist, or adding a new user.The sample code is as follows:1#!/bin/Bash2 3 Grep_user ()4 {5R=

Definition of 1.1shell1. Stacking of Commands2. A file consisting of specific syntax and specific commandsExecute script commandbash test.sh 不需要添加执行权限，使用解释器直接解释sh tesh.sh./tesh.sh 相对路径，需要添加执行权限1.2shell Script Base---VariablesVariable: A