Why is a nohup.out file created for this command?

[Wolfgang Meister]

When I perform the following command:

nohup sh -c "echo `date` >>logfile.txt && ls -l >>logfile.txt && echo `date` >>logfile.txt" &

or - alternatively - without the trainling "&":

nohup sh -c "echo `date` >>logfile.txt && ls -l >>logfile.txt && echo `date` >>logfile.txt" &

I always got a response:

nohup: appending output to `nohup.out'

file nohup.out is created but always empty. logfile.txt is filled as intended.

How can I suppress the nohup.out message and the nohup.out file creation?

Wolfgang

[John Gordon]

In <483337fb$0$6556$9b4e...@newsspool3.arcor-online.net> wmei...@hotmail.com (Wolfgang Meister) writes:

> When I perform the following command:

> nohup sh -c "echo `date` >>logfile.txt && ls -l >>logfile.txt && echo `date` >>logfile.txt" &

> or - alternatively - without the trainling "&":

> nohup sh -c "echo `date` >>logfile.txt && ls -l >>logfile.txt && echo `date` >>logfile.txt" &

Those commands are exactly the same. Did you intend them to be different?

> How can I suppress the nohup.out message and the nohup.out file creation?

Redirect the output to a file instead of letting it display on the terminal.

--
John Gordon A is for Amy, who fell down the stairs
gor...@panix.com B is for Basil, assaulted by bears
-- Edward Gorey, "The Gashlycrumb Tinies"

[Bill Marcum]

The nohup command sees the arguments 'sh' '-c' and a long quoted string.
To suppress nohup.out, you need to redirect nohup's output.

[Marcel Bruinsma]

In article <483337fb$0$6556$9b4e...@newsspool3.arcor-online.net>,
Wolfgang Meister wrote:

> nohup sh -c "echo `date` >>logfile.txt && ls -l \
> >>logfile.txt && echo `date` >>logfile.txt" &

Redirect std{in,out,err} of nohup:

$ nohup sh -c 'date; ls -l; date' </dev/null >>logfile.txt 2>&1 &

[h.stroph]

"Wolfgang Meister" <wmei...@hotmail.com> wrote in message
news:483337fb$0$6556$9b4e...@newsspool3.arcor-online.net...

> How can I suppress the nohup.out message and the nohup.out file creation?

2>/dev/null will suppress the message, but you can't prevent hohup.out ...
just ignore it.

[Joachim Schmitz]

Redirect stderr too
nohup sh -c "echo `date` >>logfile.txt 2>&1 && ls -l >>logfile.txt 2>&1 &&
echo `date` >>logfile.txt 2>&1" &

>
> Wolfgang
Bye, Jojo

[Dan Mercer]

"Wolfgang Meister" <wmei...@hotmail.com> wrote in message
news:483337fb$0$6556$9b4e...@newsspool3.arcor-online.net...

> When I perform the following command:
>
> nohup sh -c "echo `date` >>logfile.txt && ls -l >>logfile.txt && echo
> `date` >>logfile.txt" &
>
> or - alternatively - without the trainling "&":
>
> nohup sh -c "echo `date` >>logfile.txt && ls -l >>logfile.txt && echo
> `date` >>logfile.txt" &
>
> I always got a response:
>
> nohup: appending output to `nohup.out'

That's because you haven't redirected stdout. The sh command you call
redirects
stdout, but that does not affect the nohup cmd. BTW, what do you hope to
gain by \
"echo `date`"? Try:

nohup sh -c 'date;ls-l;date' >> logfile.txt &

Dan Mercer

[LordSky]

Hi,
i think that you cannot suppress nohup.out file creation.
From the man page:

FILES
nohup.out The output file of the nohup execu-
tion if standard output is a termi-
nal and if the current directory is
writable.

$HOME/nohup.out The output file of the nohup execu-
tion if standard output is a termi-
nal and if the current directory is
writable

It indicates that every time nohup is called from terminal, it creates
the nohup.out file.
Regards

[Darren Salt]

I demand that LordSky may or may not have written...

[snip]

> i think that you cannot suppress nohup.out file creation. From the man
> page:

> FILES
> nohup.out The output file of the nohup execu-
> tion if standard output is a termi-
> nal and if the current directory is
> writable.

"if standard output is a terminal".

So make it not a terminal. Redirect the output.

[snip]
--
| Darren Salt | linux or ds at | nr. Ashington, | Toon
| RISC OS, Linux | youmustbejoking,demon,co,uk | Northumberland | Army
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