退出状态
sed不向grep一样，不管是否找到指定的模式，它的退出状态都是0。只有当命令存在语法错误时，sed的退出状态才不是0。
对文件所属主owner的影响
一直以为sed -i只是对文件编辑，不会影响文件的权限，最近才知道会改变文件的owner，会改成当前用户的owner， 在ws3.0上会有这种情况，在centos4.4或更高的版本不会产生这样的问题
[root@CT53-64b logs]# sed --version
GNU sed version 4.1.5
Copyright (C) 2003 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE,
to the extent permitted by law. |
14:31 |
[root@WAPI01 ~]# sed --version
GNU sed version 4.1.2
Copyright (C) 2003 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE,
to the extent permitted by law. |
14:31 |
[root@jsz1wl044 tmp]# sed --version
GNU sed version 4.0.7
Copyright (C) 2003 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE,
to the extent permitted by law. |
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