设置环境变量的方法linux 设置环境变量的方法 linux

Linux 导出命令

Linux 导出命令用于设置或显示环境变量。

在 shell 中执行程序时，shell 会提供一组环境变量。导出可增加，修改或删除环境变量，供后续执行的程序使用。导出的效果仅限于该次登陆操作。命令export [-fnp][变量名称]=[变量设置值]登录后复制

说明参数：-f表示[变量名称]中为函数名称。-n 删除指定的变量。变量实际执行删除，只是不会输出到后续指令的执行环境中。-p 列出所有的shell赋予程序的环境变量。

实例

装载当前所有的环境变量# export -p // 装载当前的环境变量值declare -x HOME=amp；ldquo；/rootamp；ldquo；declare -x LANG=amp；ldquo；zh_CN.UTF-8amp；ldquo；declare -x LANGUAGE=amp；ldquo；zh_CN：zhamp；ldquo；declare -x LESSCLOSE=amp；ldquo；/usr/bin/lesspipe s samp；ldquo；声明-x LESSOPEN=amp；ldquo；| /usr/bin/lesspipe samp；ldquo；声明-x LOGNAME=amp；ldquo；rootamp；ldquo；声明-x LS_COLORS=amp；ldquo；amp；ldquo；声明-x MAIL=amp；ldquo；/var/mail/rootamp；ldquo；声明-x OLDPWDdeclare -x PATH=amp；ldquo；/opt/toolchains/arm920t-eabi/bin：/opt/toolchains/arm920t-eabi/bin：/usr/local/sbin：/usr/local/bin：/usr/sbin：/usr/bin：/sbin：/bin：/usr/gamesamp；ldquo；声明-x PWD=amp；ldquo；/rootamp；ldquo；声明-x SHELL=amp；ldquo；/bin/bashamp；ldquo；声明-x SHLVL=amp；ldquo；1amp；ldquo；声明-x SPEECHD_PORT=amp；ldquo；6560amp；ldquo；声明-x SSH_CLIENT=amp；ldquo；192.168.1.65 1674 22amp；ldquo；声明-x SSH_CONNECTION=amp；ldquo；192.168.1.65 1674 192.168.1.3 22amp；ldquo；声明-x SSH_TTY=amp；ldquo；/dev/pts/2amp；ldquo；声明-x TERM=amp；ldquo；XTERMamp；ldquo；声明-x USER=amp；ldquo；rootamp；ldquo；声明-x XDG_SESSION_COOKIE=amp；ldquo；93b5d3d03e032c0cf892a4474bebda9f-1273864738.954257-340206484amp；ldquo；登录后复制

定义环境变量#export MYENV //定义环境变量#export -p //导入当前的环境变量declare -x HOME=amp；ldquo；/rootamp；ldquo；声明 -x LANG=amp；ldquo；zh_CN.UTF-8amp；ldquo；声明 -x LANGUAGE=amp；ldquo；zh_CN：zhamp；ldquo；声明 -x LESSCLOSE=

amp；ldquo；/usr/bin/lesspipe s samp；ldquo；声明-x LESSOPEN=amp；ldquo；| /usr/bin/lesspipe samp；ldquo；声明-x LOGNAME=amp；ldquo；rootamp；ldquo；声明-x LS_COLORS=amp；ldquo；amp；ldquo；声明-x MAIL=amp；ldquo；/var/mail/rootamp；ldquo；声明-x MYENVdeclare -x OLDPWDdeclare -x PATH=amp；ldquo；/opt/toolchains/arm920t-eabi/bin：/opt/toolchains/arm920t-eabi/bin：/usr/local/sbin：/usr/local/bin：/usr/sbin：/usr/bin：/sbin：/bin：/usr/gamesamp；ldquo；声明-x PWD=amp；ldquo；/rootamp；ldquo；声明-x SHELL=amp；ldquo；/bin/bashamp；ldquo；声明-x SHLVL=amp；ldquo；1amp；ldquo；声明-x SPEECHD_PORT=amp；ldquo；6560amp；ldquo；声明-x SSH_CLIENT=amp；ldquo；192.168.1.65 1674 22amp；ldquo；声明-x SSH_CONNECTION=amp；ldquo；192.168.1.65 1674 192.168.1.3 22amp；ldquo；声明-x SSH_TTY=amp；ldquo；/dev/pts/2amp；ldquo；声明-x TERM=amp；ldquo；XTERMamp；ldquo；声明-x USER=amp；ldquo；rootamp；ldquo；声明-x XDG_SESSION_COOKIE=amp；ldquo；93b5d3d03e032c0cf892a4474bebda9f-1273864738.954257-340206484amp；ldquo；登录后复制

定义环境变量赋值#export MYENV=7 //定义环境变量并赋值#export -pdeclare -x HOME=amp；ldquo；/rootamp；ldquo；声明 -x LANG=amp；ldquo；zh_CN.UTF-8amp；ldquo；声明 -x LANGUAGE=amp；ldquo；zh_CN：zhamp；ldquo；声明 -x LESSCLOSE=amp；ldquo；/usr/bin/lesspipe s samp；ldquo；声明 -x LESSOPEN=amp；ldquo；| /usr/bin/lesspipe samp；ldquo；声明-x LOGNAME=amp；ldquo；rootamp；ldquo；声明-x LS_COLORS=amp；ldquo；amp；ldquo；decl

是-x MAIL = amp；ldquo；/ var / mail / rootamp；ldquo；声明-x MYENV = amp；ldquo；7amp；ldquo；声明-x OLDPWDdeclare -x PATH = amp；ldquo；/ opt / toolchains / arm920t-eabi / bin：/ opt / toolchains / arm920t-eabi / bin：/ usr / local / sbin：/ usr / local / bin：/ usr / sbin：/ usr / bin：/ sbin：/ bin：/ usr / gamesamp；ldquo；声明-x PWD = amp；ldquo；/ rootamp；ldquo；声明-x SHELL = amp；ldquo；/ bin / bashamp；ldquo；声明-x SHLVL = amp；ldquo；1amp；ldquo；声明-x SPEECHD_PORT = amp；ldquo；6560amp；ldquo；声明-x SSH_CLIENT=amp；ldquo；192.168.1.65 1674 22amp；ldquo；声明-x SSH_CONNECTION=amp；ldquo；192.168.1.65 1674 192.168.1.3 22amp；ldquo；声明-x SSH_TTY=amp；ldquo；/dev/pts/2amp；ldquo；声明-x TERM=amp；ldquo；XTERMamp；ldquo；声明-x USER=amp；ldquo；rootamp；ldquo；声明-x XDG_SESSION_COOKIE=amp；ldquo；93b5d3d03e032c0cf892a4474bebda9f-1273864738.954257-34020 6484amp；ldquo；登录后复制

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