常用命令
<1>mount -n -o remount,rw / 解决只读问题
-n, --no-mtab
Mount without writing in /etc/mtab. This is necessary for example when /etc is on a
read-only filesystem.
<2>sed -i '10s/old/new/' file.txt 10:指行数
<3>sed删除某行=====>
c121 tmp # cat test
aa
bb
c121 tmp # sed -r -i '2d' test
c121 tmp # cat test
aa
<3>vim中选中多行后批量缩进=>V选中要缩进的行,> 向右缩进一个tab
<4>linux find命令查找当前目录下7天前的文件但排除所有目录. find . -maxdepth 1 -mtime +7 -type f