zqilli的博客

sed -n '1,10p' example.txt 取前10行 sed -n '5,$'p example.txt 取5行到最后一行 sed '1,10d' example.txt 删除前10行 sed '2d' example.txt 删除第2行 sed '1,2d' example.txt 删除1~2行 sed '1,2!d' example.txt 删除1~2之外的所有行 sed "n;d" ...

1、判断语法 if [ command1 ]; then do_command1 elif [ command2 ]; then do_command2 else do_command3 fi #上条命令运行结果判断 command if [ $? -eq 0 ]; then echo "command execution success" elif [ $? -eq 1 ]; then echo "command execution fail" fi ca