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Full Discussion: How to get a timestamp when running nohup & from a shell?
Top Forums UNIX for Dummies Questions & Answers How to get a timestamp when running nohup & from a shell? Post 302905485 by newbie_01 on Wednesday 11th of June 2014 09:43:05 PM
Old 06-11-2014
Quote:
Originally Posted by rbatte1
Putting a command in the background means that you lose the flow. Your initial:-
Code:
date
nohup cp -rp /files/source /files/target &
date

.... will just give you two timestamps almost immediately sequentially and your script will continue whilst the copy make still be progressing.

What are you actually after? If you keep the copy in the foreground of your script (take off the nohup and the &) then you will get the correct before & after times.

For a marker telling you the elapse (and other info) just use this:-
Code:
date
time cp -rp /files/source /files/target
date

I hope that this helps



Robin
Hi,

I want to be able to use several nohup & in the shell script so as not having to wait for the one cp to complete to proceed with the next cp.

But as you pointed I can take out the nohup and run nohup the shell itself and I will get the timestamp.

Just want to make sure I understand what you mean by not using nohup &. If let's say I have several scripts name x1.sh, x2.sh that contains line like below:

Code:
#!//bin/ksh
x1.sh
date
cp -rp /app/source/dir1 /app/target/dir1
date

#!//bin/ksh
x2.sh
date
cp -rp /app/source/dir2 /app/target/dir2
date

Then I should be able to run each of them as below and get the date output, is that correct?

Code:
nohup x1.sh & 1>x1.out 2>&1
nohup x2.sh & 1>x1.out 2>&1

Thanks in advance.
 

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LEARN ABOUT XFREE86

nohup

NOHUP(1)                                                           User Commands                                                          NOHUP(1)

NAME

       nohup - run a command immune to hangups, with output to a non-tty

SYNOPSIS

       nohup COMMAND [ARG]...
       nohup OPTION

DESCRIPTION

       Run COMMAND, ignoring hangup signals.

       --help display this help and exit

       --version
              output version information and exit

       If  standard  input  is a terminal, redirect it from an unreadable file.  If standard output is a terminal, append output to 'nohup.out' if
       possible, '$HOME/nohup.out' otherwise.  If standard error is a terminal, redirect it to standard output.   To  save  output  to  FILE,  use
       'nohup COMMAND > FILE'.

       NOTE: your shell may have its own version of nohup, which usually supersedes the version described here.  Please refer to your shell's doc-
       umentation for details about the options it supports.

AUTHOR

       Written by Jim Meyering.

REPORTING BUGS

       GNU coreutils online help: <http://www.gnu.org/software/coreutils/>
       Report nohup translation bugs to <http://translationproject.org/team/>

COPYRIGHT

       Copyright (C) 2017 Free Software Foundation, Inc.  License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
       This is free software: you are free to change and redistribute it.  There is NO WARRANTY, to the extent permitted by law.

SEE ALSO

       Full documentation at: <http://www.gnu.org/software/coreutils/nohup>
       or available locally via: info '(coreutils) nohup invocation'

GNU coreutils 8.28                                                 January 2018                                                           NOHUP(1)
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