$*
Include all command-line arguments as a single text value
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Include all command-line arguments as separate text values
$#
Number of command-line arguments
$?
Exit
http://tldp.org/LDP/abs/html/Advanced Bash Scripting Programming GuideAn in-depth exploration of scripting language artThis tutorial does not assume previous scripting or programming knowledge, but progresses quickly toward an intermediate/advanced
This article is the second chapter of "learning the bash shell" 3rd edition, command-line editing, Reading Notes. But we will not limit this.
In general, I just try to press it directly. If an error occurs, use the cursor and arrow on the left or
Advanced Bash Script Programming Guide-general Linux technology-Linux programming and kernel information. Read the following for details. Advanced Bash Script Programming Guide
Main directory
Part 1. Warm up
1. Why use shell programming?
2. Start
1. Exit status of the command (1), (Kw:exit status)Each command has an exit state, represented by a non-negative integerStatus code 0 indicates that the command is running without errorsNon-0 Status code indicates a command errorThe range of status
--book author Shenmon reprint please specify the source
Content Introduction
Objective
What is a shell?
Our first shell script
Run the shell script
Summarize
Part V Third lesson preview: variable in hand, shell not
Chapter1 Key Knowledge Review outline one, WEEK21. Learning Objectives① can install the Linux operating system independently ② can skillfully use the basic commands of the Linux system ③ skilled use of Linux User management commands/system-related
Bash working features:1. Support Command history, command completion2. Support Pipeline, redirect3. Support Command aliases4. Support for command line editing5. Support Command line deployment6. Support File name wildcard7. Support for using
--
Boot The diskboot file in the CDDd If = diskboot. IMG of =/dev/SDB
USB Linux
Livecd can be directly installed using the system CD or DVD.
Review the startup process:
Boot --> BIOS (configure the main board program, Basic Input and Output System,
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