env命令
linux系统中的环境变量是很多的,就算是一些常用的环境变量我们也不一定能记得全名。env命令可以显示当前操作系统所有的环境变量,下面的示例代码是Ubuntu系统的。
示例
dai@ubuntu:~$ envUSER=daiXDG_SESSION_PATH=/org/freedesktop/DisplayManager/Session0XDG_SEAT_PATH=/org/freedesktop/DisplayManager/Seat0SSH_AUTH_SOCK=/run/user/1000/keyring-6YCIFa/sshDEFAULTS_PATH=/usr/share/gconf/ubuntu.default.pathXDG_CONFIG_DIRS=/etc/xdg/xdg-ubuntu:/usr/share/upstart/xdg:/etc/xdgPATH=/usr/local/arm/arm-q3/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/binPWD=/home/daiHOME=/home/daiUPSTART_EVENTS=started startingLOGNAME=daiQT4_IM_MODULE=ximXDG_DATA_DIRS=/usr/share/ubuntu:/usr/share/gnome:/usr/local/share/:/usr/share/DBUS_SESSION_BUS_ADDRESS=unix:abstract=/tmp/dbus-PERqBL8H1oLESSOPEN=| /usr/bin/lesspipe %sINSTANCE=UnityUPSTART_JOB=unity-settings-daemonTEXTDOMAIN=im-configXDG_RUNTIME_DIR=/run/user/1000DISPLAY=:0XDG_CURRENT_DESKTOP=UnityGTK_IM_MODULE=ibusLESSCLOSE=/usr/bin/lesspipe %s %sTEXTDOMAINDIR=/usr/share/locale/COLORTERM=gnome-terminalXAUTHORITY=/home/dai/.Xauthoritydai@ubuntu:~$