Hi what if i want to put this commands on a script
ssh -n server1 'tail -f /var/log/syslog | sed --unbuffered "s/^/$(hostname): /"' >>syslog.tail.out & ssh -n server2 'tail -f /var/log/syslog | sed --unbuffered "s/^/$(hostname): /"' >>syslog.tail.out & can you advise Thanks a lot Dan Bob Proulx wrote: > > dan sas wrote: >> what about if i want to run both commands simultaneous and send the >> output to a file how can i do that > > This is getting further off topic for the bug bash mailing list. It > really isn't too much about bash but just general help with how things > work. A better place to ask these types of questions would be the > help-gnu-ut...@gnu.org mailing list. If you have more questions in > the future let's please have the discussion there. > > You could put the commands in the background. To put commands in the > background use the '&' character at the end of the command line. > > If a command is terminated by the control operator &, the shell > exe- > cutes the command in the background in a subshell. The shell does > not > wait for the command to finish, and the return status is 0. > Commands > separated by a ; are executed sequentially; the shell waits for > each > command to terminate in turn. The return status is the exit > status of > the last command executed. > > And also redirect the output to a file. > > ssh -n server1 'tail -f /var/log/syslog | sed --unbuffered > "s/^/$(hostname): /"' >>syslog.tail.out & > ssh -n server2 'tail -f /var/log/syslog | sed --unbuffered > "s/^/$(hostname): /"' >>syslog.tail.out & > > By this point it looks very much like you are trying to re-invent the > remote logging feature of a syslogd. Because I now expect a new > question about how to start and restart this connection automatically. > (Am I right? :-) Instead please investigate using one of the syslog > programs that does exactly that already. See for example 'rsyslogd' > which supports remote logging. > > Good luck! > Bob > > > -- View this message in context: http://old.nabble.com/problem-with-tail--f-that-need-to-add-to-each-line-constant-string-at-the-beginning-of-each-line-tp32742979p32757229.html Sent from the Gnu - Bash mailing list archive at Nabble.com.
