例如:
代码: 全选
root@debian:~# losetup |awk "/${loopfile}/ {\$1}"
awk: cmd. line:1: //home/username/swap_test/ {$1}
awk: cmd. line:1: ^ syntax error
root@debian:~#
额外收获:
一开始没看懂2楼的代码
https://www.tutorialspoint.com/awk/awk_workflow.htm
$0原来代表的是当前整行,而非整个输入