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Linux set command

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Linux set command to set shell.

set instruction can be used to set the shell implementation, you can do to set according to different needs.

grammar 

set [+-abCdefhHklmnpPtuvx]

Parameter Description:

  • -a marked modified variables for output to an environment variable.
  • -b make daemon aborted immediately return execution state.
  • -C Steering resulting file can not overwrite existing files.
  • -d Shell will use the default hash table memory used instructions to speed up execution of the instruction. Use the -d parameter to cancel.
  • -e command if the return value is not equal to 0, then immediately exit the shell.
  • -f eliminate the use of wildcards.
  • -h location of automatic recording function.
  • -H Shell can use the "!" Plus <command number> way to execute instructions recorded in history.
  • -k command to the arguments will be considered in this instruction environment variables.
  • -l variable names for loop recording.
  • -m to use the monitor.
  • -n read-only command, without actually executed.
  • -p Start Priority mode.
  • After -P -P startup parameters, when the instruction is executed, it will be the actual file or directory to replace symbolic links.
  • -t executing the subsequent instructions to exit shell.
  • -u use when performing off to an undefined variable error message is displayed.
  • -v Displays shell input values ​​read.
  • After -x execute instructions that parameters and under will be displayed.
  • + <Parameter> to cancel a parameter set has been started.

Examples

Display environment variable 

# 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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