Linux Commands: Set an environment variable


export-Linux Command

export

Set an environment variable. Mark each name to be passed to child processes in the environment.
SYNTAX
      export [-fn] [-p] [name[=value]]

OPTIONS
      -f   The names refer to shell functions; 
           otherwise the names refer to shell variables
      -n   No longer mark each name for export.
      -p   Display output in a form that may be reused as input.

If no names are supplied, or if the `-p' option is given, a list of exported names is displayed.

The return status is zero unless an invalid option is supplied, one of the names is not a valid shell variable name, or `-f' is supplied with a name that is not a shell function.

export is a BOURNE shell command and a POSIX `special' builtin.

Example - local variables

old_file=export.csv
new_file=last.csv
mv $old_file $new_file

Example - global variables

mydepartment=Sales ; export mydepartment
mycustomer='Brown Brothers' ; export mycustomer

Related Linux Bash commands:

env - Display, set, or remove environment variables
echo - Display message on screen
hostname - Print or set system name
local - Create variables
printenv - Print environment variables
readonly - Mark variables/functions as readonly
shift - Shift positional parameters
unset - Remove variable or function names

Other Linux Commands:
alias , break , builtin , cal , case , cat , cd , cfdisk , chgrp , chmod , chown , chroot , cksum , cmp , comm , command , continue , cp , cron , crontab , csplit , cut , date , dc , dd , declare , df , diff , diff3 , dir , dircolors , dirname , dirs , du , echo , egrep , enable , env , eval , exec , expand , export , expr , factor , false , fdformat , fdisk , fgrep , find , fmt , fold , for , fsck , function , getopts , hash , hashcharacter , head , history , hostname , id , if , import , install , join , kill , less , let , ln , local , locate , logname , logout , lpc , lpr , lprm , ls , m4 , man , mbadblocks , mkdir , mkfifo , mknod , more , mount , mtools , mv , nice , nl , nohup , passwd , paste , period , popd , pr , printf , ps , pushd , pwd , quota , quotacheck , quotactl , ram , rcp , read , readonly , return , rm , rmdir , rsync , sdiff , sed , select , seq , set , shift , shopt , shutdown , sleep , sort , split , su , sum , symlink , sync , tac , tail , tar , tee , test , time , times , top , touch , tr , traceroute , true , tsort , tty , type , ulimit , umask , uname , unexpand , uniq , units , unset , unshar , until , useradd , usermod , users , uuencode , watch , wc , whereis , which , while , who , xargs , yes ,
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