bash getopts

BASH command and usage summary, bash usage Summary I need to write a Linux script in my recent work and use a lot of BASH commands. To avoid forgetting it later, I will write them down here one by one. It may be messy. Just take a look. If something is wrong, you are welcome to correct it. 1, export VAR =... This command runs in Shell to make the script that runs

beginning of each line. In Vim, if your tab is 4 spaces, you can use this to replace the command: Copy Code code as follows: : s/^/\t/ Ix. command-line parameters Here is an example that completes the use of the above usage function. I got this code from http://kirk.webfinish.com/2009/10/bash-shell-script-to-use-getopts-with-gnu-style-long-positional-parameters/. Copy Code

************************************************************************* * * * Original:blog.csdn.net/clark_xu Xu Changliang's Column************************************************************************? time to read the file#!/bin/bashFor file in ' Ls/root 'DoStat $file >1.txtSed-n "7p" 1.txt>2.txtUsetime= awk-f ":" ' {print $2.txt} 'echo "Time=" $file $usetimeDone? reads each line of the file while statement. Cat Afile | While Read onelineDoEcho $onelineDone? reads each line of the file

Bash internal variable learning and Bash variable learning $ SECONDS variable --------- number of SECONDS after the script has been run. Script instance: 1 #!/bin/bash - 2 #=========================================================================================== 3 # 4 # 5 # FILE:seconds.sh 6 #

Linux new user with ssh remote login display-bash-4.1 $, ssh-bash-4.1 There are many methods on Baidu, most of which are in the form of adding PS1 code in. bash_profile, and then logging on to the account again... This method is difficult to achieve the desired results. The root cause of this problem is the lack of Shell environment! [Root @ localhost ~] Su-papi1Last login: Wed Jan 24 04:11:41 EST 2018

There are multiple types of Shell in Linux, the most common of which are Bourne shell (SH), c shell (CSH), and Korn shell (Ksh ). Each of the three shells has its own advantages and disadvantages. The Bourne shell is the original shell used by UNIX and can be used on every UNIX. Bourne shell is excellent in shell programming, but it is inferior to several other shells in dealing with user interactions. The default shell in Linux is the Bourne again shell, which is an extension of the Bourne shel

Linux Bash Shell learning notes, bash learning notes Parameter extension: 1. The parameter referenced by the name is called a variable.2. Parameters referenced by numbers are called positional parameters.3. Parameters referenced by a specific symbol have special meanings and purposes, and are referred to as Bash's special internal variable reference. Basic Parameter extension:Character $ will guide paramete

Bash basics man manual and bash basics manBash basics man Manual Penetration tests based on Android devices are implemented through various terminals. Therefore, it is particularly important to master Shell-related operations. Bash is a Unix Shell program written for GNU. This document selects the Kali Linux penetration test tutorial Based on Android devices. It

Bash: insufficient permissions and insufficient bash Permissions This problem occurs today when a file is opened on a terminal under ubuntu. Suddenly, the file is read-only, so you need to open its user permissions. The specific implementation is as follows: chmod 777/home/example/filename. In this way, all permissions of this file are opened and can be accessed as much as possible. The details of chmod are

Linux bash integrated instance bash Script Editor, linuxbash Note: This is a simple bash Script Editor, but it has been tested. The reason for writing this blog is to exercise loop control language, functions, location parameters, local variables, function parameter calls, and inter-function calls, there is also the parameters for Obtaining user options and optio

The operating environment of the Bash Shell:Configuration values are divided into the overall system configuration values and preferences of each person, only some files placed in different places! Path and command search orderWhen a command (such as LS) is released, which LS is it running? Run the command in a relative/absolute path, such as "/bin/ls" or "./ls"; Run by alias to find the command; Run by