作业 1、 #!/bin/bash
mkdir -p ~/dir/dir1
mkdir ~/dir/dir2
cp ./* ~/dir/dir1
cp ./*.sh ~/dir/dir2
cd ~/dir/
tar -cvJf dir2.tar.xz ./dir2
mv dir2.tar.xz ~/dir/dir1/
cd ~/dir/dir1/
tar -xvf dir2.tar.xz 2、 #!/bin/bash
head -5 /etc/group | tail -1
sudo mkdi…