Linux set command

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Linux set command for setting the shell.

The set command can set the execution mode of the shell used and can be set according to different needs.

Syntax

set [+-abCdefhHklmnpPtuvx]

Parameter description:

• -a Mark modified variables for output to environment variables.
• -b Make the background process report its execution status immediately if it is interrupted.
• -C The file to which the output is directed cannot overwrite an existing file.
• -d The shell will use a hash table to remember the commands used to accelerate command execution. Use-d parameter can be canceled.
• -e Exit the shell immediately if the return value of the command is not equal to 0.
• -f Cancel the use of wildcards.
• -h Automatically record the location of functions.
• -H Shell Use "!" plus <command number> to execute commands recorded in history.
• -k All parameters given to the command will be treated as environment variables for this command.
• -l Record the variable names in the for loop.
• -m Use monitoring mode.
• -n Read the command without actually executing it.
• -p Start in priority mode.
• -P Start-P parameters, when executing commands, will replace symbolic links with actual files or directories.
• -t Exit the shell after executing the following command.
• -u Display an error message if an undefined variable is used during execution.
• -v Display the input values read by the shell.
• -x Display the command and its arguments before executing the command.
• +<Parameter> Cancel a parameter that was previously started by set.

Online examples

Display environment variables

# set
BASH=/bin/bash
BASH_ARGC=()
BASH_ARGV=()
BASH_LINENO=()
BASH_SOURCE=()
BASH_VERSINFO=([0]="3" [1]="00" [2]="15" [3]="1" [4]="release" [5]="i386-redhat-linux-gnu")
BASH_VERSION='3.00.15(1)-release'
COLORS=/etc/DIR_COLORS.xterm
COLUMNS=99
DIRSTACK=()
EUID=0
GROUPS=()
G_BROKEN_FILENAMES=1
HISTFILE=/root/.bash_history
HISTFILESIZE=1000
HISTSIZE=1000
HOME=/root
HOSTNAME=hnlinux
HOSTTYPE=i386
IFS=$' '
INPUTRC=/etc/inputrc
KDEDIR=/usr
LANG=zh_CN.GB2312
LESSOPEN='|/usr/bin/lesspipe.sh %s'
LINES=34
L
MAIL=/var/spool/mail/root
MAILCHECK=60
OLDPWD=/home/uptech
OPTERR=1
OPTIND=1
OSTYPE=linux-gnu
PATH=/usr/kerberos/sbin:/usr/kerberos/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/usr/X11R6/bin:/root/bin:/opt/crosstools/gcc-3.4.6-glibc-2.3.6/bin
PIPESTATUS=([0]="2")
PPID=26005
PROMPT_COMMAND='echo -ne "

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