当我以 root 身份登录时，
luvpreet@DHARI-Inspiron-3542:/$ sudo su
我得到了这样的信息：
\[\e]0;\u@\h: \w\a\]${debian_chroot:+($debian_chroot)}\u@\h:\w\$
这是什么意思？为什么我会看到它？
编辑-这里有一些在评论中要求的更有用的内容，
luvpreet@DHARI-Inspiron-3542:/$ sudo su -
DHARI-Inspiron-3542#
DHARI-Inspiron-3542# exit
luvpreet@DHARI-Inspiron-3542:/$ sudo -i
\[\e]0;\u@\h: \w\a\]${debian_chroot:+($debian_chroot)}\u@\h:\w\$
\[\e]0;\u@\h: \w\a\]${debian_chroot:+($debian_chroot)}\u@\h:\w\$ exit
luvpreet@DHARI-Inspiron-3542:/$ echo $0
/bin/bash
编辑 2 - 提及所发表的评论
luvpreet@DHARI-Inspiron-3542:/$ ls -1 /root/.[a-zA-Z0-9]*
ls: cannot access '/root/.*': Permission denied
luvpreet@DHARI-Inspiron-3542:/$ sudo su -
DHARI-Inspiron-3542# ls -1d /root/.[a-zA-Z0-9]*
/root/.bash_history
/root/.bashrc
/root/.bashrc.bk
/root/.profile
/root/.profile.bk
/root/.viminfo
/root/.zcompdump
编辑3-
luvpreet@DHARI-Inspiron-3542:/etc/ansible$ sudo find /root /etc/ -maxdepth 1 -type f -exec grep -n PS1 {} +
/root/.zcompdump:1201:'-value-,PS1,-default-' '_ps1234'
/root/.zcompdump:1207:'-value-,RPS1,-default-' '_ps1234'
/root/.bashrc:60: PS1='${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\$ '
/root/.bashrc:62: PS1='${debian_chroot:+($debian_chroot)}\u@\h:\w\$ '
/root/.bashrc:69: PS1="\[\e]0;${debian_chroot:+($debian_chroot)}\u@\h: \w\a\]$PS1"
/root/.bashrc.bk:9:[ -z "$PS1" ] && return
/root/.bashrc.bk:56: PS1='${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\$ '
/root/.bashrc.bk:58: PS1='${debian_chroot:+($debian_chroot)}\u@\h:\w\$ '
/root/.bashrc.bk:65: PS1="\[\e]0;${debian_chroot:+($debian_chroot)}\u@\h: \w\a\]$PS1"
/etc/profile:7:if [ "$PS1" ]; then
/etc/profile:9: # The file bash.bashrc already sets the default PS1.
/etc/profile:10: # PS1='\h:\w\$ '
/etc/profile:16: PS1='# '
/etc/profile:18: PS1='$ '
/etc/bash.bashrc:7:[ -z "$PS1" ] && return
/etc/bash.bashrc:19:PS1='${debian_chroot:+($debian_chroot)}\u@\h:\w\$ '