centos7中的etc/profile代码发我

以下是 CentOS 7 中 `/etc/profile` 文件的默认代码：

# /etc/profile

# System wide environment and startup programs, for login setup
# Functions and aliases go in /etc/bashrc

# It's NOT a good idea to change this file unless you know what you
# are doing. It's much better to create a custom.sh shell script in
# /etc/profile.d/ to make custom changes to your environment, as this
# will prevent the need for merging in future updates.

pathmunge () {
        if ! echo $PATH | /bin/egrep -q "(^|:)$1($|:)" ; then
           if [ "$2" = "after" ] ; then
              PATH=$PATH:$1
           else
              PATH=$1:$PATH
           fi
        fi
}

if [ -x /usr/bin/id ]; then
        if [ -z "$EUID" ]; then
                # ksh workaround
                EUID=`id -u`
                UID=`id -ru`
        fi
        USER="`id -un`"
        LOGNAME=$USER
        MAIL="/var/spool/mail/$USER"
fi

# Path manipulation
if [ "$EUID" = "0" ]; then
    pathmunge /sbin
    pathmunge /usr/sbin
    pathmunge /usr/local/sbin
fi

pathmunge /usr/local/bin
pathmunge /usr/bin
pathmunge /usr/local/go/bin
pathmunge /usr/local/nodejs/bin
pathmunge /usr/local/mysql/bin
pathmunge /usr/local/php/bin
pathmunge /usr/local/python3/bin
pathmunge /usr/local/nginx/sbin
pathmunge /root/bin after

HOSTNAME=$(hostname)
export HOSTNAME

# Set the initial umask.  Only users can change this setting.
if [ $UID -gt 99 ] && [ "`id -gn`" = "`id -un`" ]; then
        umask 002
else
        umask 022
fi

# Are we an interactive shell?
if [ "$PS1" ]; then
    if [ "$BASH" ] && [ "$BASH" != "/bin/sh" ]; then
        # The file bash.bashrc already sets the default PS1.
        # PS1='\h:\w\$ '
        if [ -f /etc/bashrc ]; then
            . /etc/bashrc
        fi
    else
        if [ "`id -u`" -eq 0 ]; then
            PS1='# '
        else
            PS1='$ '
        fi
    fi
fi

# Try to keep environment pollution down, EPA loves us.
unset ENV RCFILE REPLY_HISTORY_FILE INPUTRC GLOBIGNORE
unset -f pathmunge

注意，这是默认代码，如果您对其进行了修改，可能会与此不同。建议在修改之前备份此文件。