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±¾ÀýʹÓÃechoÏÔʾ³£¼ûµÄ±äÁ¿HOME
$ echo $HOME
/home/kevin
2.ÉèÖÃÒ»¸öÐµĻ·¾³±äÁ¿
$ export MYNAME=”my name is kevin”
$ echo $ MYNAME
my name is Kevin
3.ÐÞ¸ÄÒÑ´æÔڵĻ·¾³±äÁ¿
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$ MYNAME=”change name to jack”
$ echo $MYNAME
change name to jack
4.ʹÓÃenvÃüÁîÏÔʾËùÓеĻ·¾³±äÁ¿
$ env
HOSTNAME=localhost.localdomain
SHELL=/bin/bash
TERM=xterm
HISTSIZE=1000
SSH_CLIENT=192.168.136.151 1740 22
QTDIR=/usr/lib/qt-3.1
SSH_TTY=/dev/pts/0
……
5.ʹÓÃsetÃüÁîÏÔʾËùÓб¾µØ¶¨ÒåµÄShell±äÁ¿
$ set
BASH=/bin/bash
BASH_ENV=/root/.bashrc
……
6.ʹÓÃunsetÃüÁîÀ´Çå³ý»·¾³±äÁ¿
$ export TEMP_KEVIN=”kevin”     #Ôö¼ÓÒ»¸ö»·¾³±äÁ¿TEMP_KEVIN
$ env | grep TEMP_KEVIN  &


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