当我在linux下用vi打开/etc/profile文件时
[root@localhost tmp]# vim /etc/profile/ 会出现以下错误
E325: ATTENTION Found a swap file by the name ".profile.swp" owned by: root dated: Wed Dec 7 13:52:56 2011 file name: /var/tmp/profile.swp modified: YES user name: root host name: localhost process ID: 26153 (still running) While opening file "profile.swap" dated: Wed Dec 7 14:00:46 2011 NEWER than swap file! (1) Another program may be editing the same file. If this is the case, be careful not to end up with two different instances of the same file when making changes. Quit, or continue with caution. (2) An edit session for this file crashed. If this is the case, use ":recover" or "vim -r profile.swap" to recover the changes (see ":help recovery"). If you did this already, delete the swap file ".profile.swap.swp" to avoid this message. "profile.swap" 11L, 237C Press ENTER or type command to continue
原因是我之前有一次使用vi 操作profile文件时出现了异常中断，所以在当前目录下产生了一个profile.swp文件
但是我使用ls命令查看该目录下，却发现没有这个文件，后来使用ls -a命令查看才知道profile.swp是一个隐藏文件。
注：以.开头的文件就是隐藏文件
当我把该隐藏文件删除后再次打开就没有上面的警告了。
[root@localhost tmp]# rm .profile.swp
rm: remove regular file `.profile.swp'? y
[root@localhost tmp]#
