shell script file size

Original URL: http://zhu8337797.blog.163.com/blog/static/170617549201122512712136/ Command Options function BASH–X Pin Name Echo Echo Displays each row of the script after the variable is replaced

Knowledge before learning shell scripts1) Record command historyThe commands we've knocked on, Linux will be recorded, and presets can record 1000 historical commands. These commands are saved in the. bash_history file in the user's home directory.

What is a shell script. First, it is a script and cannot be used as a formal programming language. Because it's running in the shell of Linux, it's called a shell script. To be blunt, a shell script is a collection of commands. For example, I want

I don't know if there's anything to clean up. A directory history file needs to be cleaned. There will probably be a lot of other places to clean up the history files, which may be used. I spent the past two days writing a script, cleaning more

Test switch and special parameters in Shell script, shell script1. Test Switch The following table lists the meanings of the test commands and whether they can be used in test commands, bash, and ksh. Switch Test Bash Ksh

The shell is a programming language and a service that accesses the operating system kernel.The types of shell that are common to Linux are:Bourne Shell (/usr/bin/sh or/bin/sh)Bourne Again Shell (/bin/bash)C Shell (/USR/BIN/CSH)K Shell (/usr/bin/ksh)

This article mainly summarizes the entry-level bash from the following aspects: 1. Command history and command completion 2. Pipelines and redirection 3. Command alias and command replacement 4. Edit the command line 5. File Name Configuration 6.

Shell script Programming "on"A program is a combination of instructions and data.Program Programming Style:Program: command-centric, data-serving instructionImage: Data-centric, command-serving dataProgramming Languages:Low Level:

Shell script entry, shell script There are two ways to use Shell script: ① Interactive: each time a user inputs a command, the Shell immediately executes the command; ② Batch: You can compile a complete Shell script to execute many commands in the

1. shell scripts are case sensitive2. Special Unix characters: (; $? & * () [] ''+ Escape ()3. Shell Comments start #4. Function DefinitionFunction fuction_name (){Command to execute}Function_name is directly used for calling.5. Control Structure1)