UNIX中为什么重启或者注销之后，之前插入的环境变量PATH的值恢复到启动前的状态
如题。
也就是说，之前插入的值不见了。
求解

[解决办法]
你之前是用export设的环境变量吧，这种环境变量在再一次登录的时候就会失效的。更改profile文件才能使环境变量持续有效
[解决办法]

C/C++ code

# /etc/profile for SuSE Linux## PLEASE DO NOT CHANGE /etc/profile. There are chances that your changes# will be lost during system upgrades. Instead use /etc/profile.local for# your local settings, favourite global aliases, VISUAL and EDITOR# variables, etc ...
[解决办法]
不要用export设置环境变量，只对当此有效，在/etc/profile文件中配置你的环境变量。这样才能每次都生效。
# /etc/profile for SuSE Linux
#
# PLEASE DO NOT CHANGE /etc/profile. There are chances that your changes
# will be lost during system upgrades. Instead use /etc/profile.local for
# your local settings, favourite global aliases, VISUAL and EDITOR
# variables, etc ...


[解决办法]
探讨


如何修改，我的etc／profile中是这样子的。
C/C++ code

# System-wide .profile for sh(1)

if [ -x /usr/libexec/path_helper ]; then
    eval `/usr/libexec/path_helper -s`
fi

if [ "${BASH-no}" != "no" ]; then
    [ -……

[解决办法]
没有加到.profile 里就可以了，要生效source .profile
[解决办法]
change /etc/profile or /etc/profile.local ?