大家好,又见面了,我是你们的朋友全栈君。
ll命令其实就是ls -l,当然如果想显示隐藏信息就是 ls -al。
我个人是特别喜欢ll代替ls -al命令,并且还要有颜色的那种。
今天卸载软件重新安装环境变量怎么都不对了,一生气把环境变量都清空了。命令:unset PATH
然后就手动添加环境变量:
/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin:/root/bin
但是ll命令却没有了。
解决方案一 (没有颜色):
在~/.bashrc文件最上面添加
代码语言:javascript复制alias ll='ls -la' #这一行是让命令行支持ll
alias ls="ls --color" #这一行是让ls有颜色
然后运行命令:source ~/.bashrc
此时ll就有了,并且重新打开终端也生效
解决方案二:
从另一台机器上复制了一份/etc/profile文件过来发现就有颜色了。可能是我之前的/etc/profile文件坏了。
centos7文件内容如下,其他系统不清楚是否一样:
网盘链接:
链接: https://pan.baidu.com/s/1iqDphAxqxxTuB-H75LRpGA 提取码: zzp2
代码语言:javascript复制# /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 () {
case ":${PATH}:" in
*:"$1":*)
;;
*)
if [ "$2" = "after" ] ; then
PATH=$PATH:$1
else
PATH=$1:$PATH
fi
esac
}
if [ -x /usr/bin/id ]; then
if [ -z "$EUID" ]; then
# ksh workaround
EUID=`/usr/bin/id -u`
UID=`/usr/bin/id -ru`
fi
USER="`/usr/bin/id -un`"
LOGNAME=$USER
MAIL="/var/spool/mail/$USER"
fi
# Path manipulation
if [ "$EUID" = "0" ]; then
pathmunge /usr/sbin
pathmunge /usr/local/sbin
else
pathmunge /usr/local/sbin after
pathmunge /usr/sbin after
fi
HOSTNAME=`/usr/bin/hostname 2>/dev/null`
HISTSIZE=1000
if [ "$HISTCONTROL" = "ignorespace" ] ; then
export HISTCONTROL=ignoreboth
else
export HISTCONTROL=ignoredups
fi
export PATH USER LOGNAME MAIL HOSTNAME HISTSIZE HISTCONTROL
# By default, we want umask to get set. This sets it for login shell
# Current threshold for system reserved uid/gids is 200
# You could check uidgid reservation validity in
# /usr/share/doc/setup-*/uidgid file
if [ $UID -gt 199 ] && [ "`/usr/bin/id -gn`" = "`/usr/bin/id -un`" ]; then
umask 002
else
umask 022
fi
for i in /etc/profile.d/*.sh /etc/profile.d/sh.local ; do
if [ -r "$i" ]; then
if [ "${-#*i}" != "$-" ]; then
. "$i"
else
. "$i" >/dev/null
fi
fi
done
unset i
unset -f pathmunge
千万不要放在windows系统里编辑这个文档,linux和windows编码方式不同,我就在windows下打个空格然后就报错:
-bash: $’r’: command not found 用上述文件替换自己的/etc/profile
执行命令:source /etc/profile
好了,现在所有的终端打开都可以使用ll并且是有颜色的了:
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