Is there a way to release all processes that were run from a terminal window
(that is, after they are already running), so they won't be closed when you close
the terminal? If that's not possible, is there a way to release a specific
process after it's already running?
Thanks.
Warren
Benjamin Scott wrote:
> On Thu, 15 Jun 2000, Rick Petree wrote:
> > When you sent a process to the background how do you turn off the
> > annoying error messages that may come up. For example: you use the find
> > command to locate a file and you send this long process to the background
> > and direct the output to a file that you will check later for the results.
>
> UNIX has the concept of two "output streams", called "standard out" and
> "standard error". Each has a file descriptor associated with it: 1 for
> stdout, 2 for stderr. If your shell is bash (or another Bourne-compatible
> shell), you can redirect either of these two independently.
>
> cmd > cmd.out # execute cmd, stdout to cmd.out
> cmd 2> cmd.err # execute cmd, stderr to cmd.err
> cmd > cmd.out 2> cmd.err # stdout to cmd.out, stderr to cmd.err
>
> So, to run a find command in the background, redirecting output to a file, and
> simply discarding all error messages, use:
>
> find /some/dir > $HOME/find.out 2> /dev/null &
>
> You may also be interested in the "nohup" command, which prevents commands
> from terminating if the terminal "hangs up" on it (or log out or close the
> xterm or whatever). For example:
>
> nohup find /some/dir > $HOME/find.out 2> /dev/null &
>
> > 2. When using the nice command to change the priority of a process how
> > does it work if the process is already running?
>
> The nice command, per se, cannot do that.
>
> There is a command "renice" that can change the priority of a running
> process. For example:
>
> renice 20 1234
>
> will take process 1234, and change its priority so that it only runs when the
> system is otherwise idle.
>
> Note that, for security and historical reasons, only root can increase the
> priority of a running job.
>
> --
> Ben Scott <[EMAIL PROTECTED]>
> Net Technologies, Inc. <http://www.ntisys.com>
> Voice: (800)905-3049 x18 Fax: (978)499-7839
>
> **********************************************************
> To unsubscribe from this list, send mail to
> [EMAIL PROTECTED] with the following text in the
> *body* (*not* the subject line) of the letter:
> unsubscribe gnhlug
> **********************************************************
--
Warren Mansur
email: [EMAIL PROTECTED]
phone: 603-884-5435
**********************************************************
To unsubscribe from this list, send mail to
[EMAIL PROTECTED] with the following text in the
*body* (*not* the subject line) of the letter:
unsubscribe gnhlug
**********************************************************
