On 01/02/2018 07:25 AM, lil...@chinaunicom.cn wrote:
> When I enter a "ls " command at the directory "/root",the OS connection
> will closed.
are you sure "ls" is /usr/bin/ls?
$ type ls
ls is /usr/bin/ls
I.e., it could be aliased to something weird, e.g. a shell function which
calls '/usr/bin/ls' under the hood but "exit"s in certain cases:
$ _ls() { /usr/bin/ls ${1+"$@"} | grep . || exit; }
$ alias ls=_ls
$ type ls
ls is aliased to `_ls'
$ ls
bin
file
home
...
$ ls ENOENT
/usr/bin/ls: cannot access 'ENOENT': No such file or directory
logout
Other than that, I don't see how the spawned 'ls' process could lead
to a logout of the calling shell process.
Have a nice day,
Berny
