試圖將Debian版本號變爲變量,我遇到了通過grep進行過濾的問題。從shell輸出中刪除特定行
如果我做lsb_release:
~# lsb_release -a
No LSB modules are available.
Distributor ID: Debian
Description: Debian GNU/Linux 7.1 (wheezy)
Release: 7.1
Codename: wheezy
得到公正含有描述行了,我想:
# lsb_release -a | grep -i 'Description'
No LSB modules are available.
Description: Debian GNU/Linux 7.1 (wheezy)
不過,我還是得有 「No LSB模塊可供選擇。」
我試圖專門與排除它:
# lsb_release -a | grep -v 'LSB' | grep -i 'Description'
No LSB modules are available.
Description: Debian GNU/Linux 7.1 (wheezy)
我仍然獲得包含字符串「LSB」的路線。這是爲什麼發生?我怎樣才能得到所需的線路?