root@ubuntu:~# alias

alias egrep='egrep --color=auto'

alias fgrep='fgrep --color=auto'

alias grep='grep --color=auto'

alias l='ls -CF'

alias la='ls -A'

alias ll='ls -alF'

alias ls='ls --color=auto'

root@ubuntu:~# echo $SHELL

/bin/bash

root@ubuntu:~#

添加alias ..='cd .. --color=auto'到/etc/bash.bashrc并source /etc/bash.bashrc使配置生效

root@ubuntu:~# vi /etc/bash.bashrc

root@ubuntu:~# vi /etc/profile

root@ubuntu:~# vi /etc/bash.bashrc

root@ubuntu:~# vi /etc/bash.bashrc

root@ubuntu:~# tail /etc/bash.bashrc

                    /usr/share/command-not-found/command-not-found -- "$1"

                   return $?

                else

                    printf "%s: command not found\n" "$1" >&2

                    return 127

                 fi

        }

fi

#added on 20170609

alias ..='cd .. --color=auto'

root@ubuntu:~# source /etc/bash.bashrc

root@ubuntu:~# cd /tmp

root@ubuntu:/tmp# ..

root@ubuntu:/# alias

alias ..='cd .. --color=auto'

alias egrep='egrep --color=auto'

alias fgrep='fgrep --color=auto'

alias grep='grep --color=auto'

alias l='ls -CF'

alias la='ls -A'

alias ll='ls -alF'

alias ls='ls --color=auto'

root@ubuntu:/#

测试并查看，可以发现添加的命令别名已生效。