sed如何加入第一行?? - Linux

By Heather
at 2011-04-14T21:27
at 2011-04-14T21:27
Table of Contents
不好意思 跟個位請教一下...
touch /dev/shm/aaa
sed -i '$a 我很帥我很帥' /dev/shm/aaa
sed -i '$a 你也是你也是' /dev/shm/aaa
比如我在BASH Shell裡打
原本打算 會在/dev/shm下產生aaa的檔
然後裡面是
=========================================
我很帥我很帥
你也是你也是
=========================================
可是個人去跑 卻不是上述這樣 而是空白
可是如果在檔案第一行亂打一些 比如@$#%#$%
再去跑BASH Shell
然後裡面是
=========================================
@$#%#$%
我很帥我很帥
你也是你也是
=========================================
個人在想是不是aaa剛建 裡面沒東西
所以連第一行都插不進去?? 可是只要第一行有東西 下面就可以跑插入內容
問題一直卡在剛建好檔完裡面的第一行
請教一下 指令要怎麼下???
找好幾天一直不知道怎麼下...
檔案建立好 裡面卻是空白...
--
Tags:
Linux
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