Sponsored Content
Top Forums UNIX for Dummies Questions & Answers Nohup not working as expected Post 302839035 by sebcou on Wednesday 31st of July 2013 07:35:25 AM
Old 07-31-2013
Nohup not working as expected

Hi. I am trying to start a script on my router that will execute even if i log off. To execute the script I write:

nohup ./dslconnection > dslstat.out 2>&1 &

It starts the job:
21968 admin 1604 S /bin/ash ./dslconnection

The problem is that when I log back in the job has been terminated.

To debug I tried the same thing with ping.
nohup ping 192.168.1.91 > dslstat.out 2>&1 &

This worked and ping was still executed when I logged back in.

The script I want to run is below. Any ideas of what could be the problem??

Code:
#!/bin/ash
statusname=0
while true
 do
        laststatus=$statusname
        ping -c 1 -W 1 www.google.se > /dev/null
        statusname=$?
        if [ "$statusname" -ne "$laststatus" ]; then
           date
           if [ "$statusname" -eq 0 ]; then
                  echo Google is reachable
           else
                  echo Google unreachable
           fi
        fi
    sleep 10
done

 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

which not working as expected

Hello. Consider the following magic words: # ls `which adduser` ls: /usr/sbin/adduser: No such file or directory # Hmmm... Then: # ls /usr/sbin/adduser /usr/sbin/adduser # Now what? Unforunately this little sniippet is used in my debian woody server's mysql pre install script.... (2 Replies)
Discussion started by: osee
2 Replies

2. Shell Programming and Scripting

ls not working as expected within ksh

Hi, I use the command ls a\b\c\*.txt from the command line on HP UNIX and it works fine - It lists all files matching *.txt in the a\b\c directory When embeded in a ksh script `ls a\b\c\*.txt` it does not work - I get *.txt not found (even though there are files) I tried... (10 Replies)
Discussion started by: GNMIKE
10 Replies

3. Solaris

nohup not working

Hi, I am working in SunOS 5.8. I wanted to run a script in background and I gave the following command, but it is not working. I gave "nohup ksh ULOAD.ksh &" It just came out giving a msg "Redirection or piping of stdin or stdout is allowed only with -b. (156)" in nohup.out file. If I... (2 Replies)
Discussion started by: arsheshadri
2 Replies

4. Solaris

NOHUP not working

Hello All, Here is a problem of NOHUP. I am trying to run a process which needs to be up and running even if the session is closed. I tried running it with "nohup", but starngely it is not working, when i exit from the session the process is also getting killed? plz help me in finding out... (4 Replies)
Discussion started by: shivamasam
4 Replies

5. Shell Programming and Scripting

Why this is not working in expected way?

total=0 seq 1 5 | while read i ; do total=$(($total+$i)) echo $total done echo $totalThis outputs: 1 3 6 10 15 0whereas I am expecting: 1 3 6 10 15 15My bash version: (4 Replies)
Discussion started by: meharo
4 Replies

6. UNIX for Dummies Questions & Answers

-atime not working as expected

I need to sort through a volume that contains video files by access time and delete files that have not been accessed over x days. I have to use the access time as video files are originals that do not get modified, just read Testing commands on a local test folder... $ date Wed Sep 28... (10 Replies)
Discussion started by: canon273
10 Replies

7. Shell Programming and Scripting

nohup not working

Hi all, I wrote a scirpt (abc.sh) in which I defined a loop with an interval equal to 1 hour. I want this script continue to run when I close the terminal, so I ran the following command, (in the proper directory) nohup abc.sh However the script doesn't just keep running when I... (1 Reply)
Discussion started by: isaacniu
1 Replies

8. Shell Programming and Scripting

shell script not working with nohup

Hello, I am trying to run a shell script with the nohup command. The shell script takes an array of files, runs a python program on each file in a loop, and appends the output to a file. This works fine on the server, but if I try to use the nohup command it does not work. --- #!/bin/sh... (10 Replies)
Discussion started by: ricitron
10 Replies

9. Shell Programming and Scripting

How to stop nohup which is working background

Please I have run a background script using nohup please tell me way to stop this. Thanks in Advance (4 Replies)
Discussion started by: mumakhij
4 Replies

10. Shell Programming and Scripting

Nohup not give expected output. Non-stop running process

Hello, I am trying to make a bash script, I tested nohup but it did not help me. My code is: ffmpeg -i $input_url -c:v copy -c:a copy -listen 1 -f mpegts http://localhost:port/live/test When I open it in VLC, it starts feeding my screen and I see bitrate values. When I stop watching it,... (4 Replies)
Discussion started by: baris35
4 Replies
nohup(1)						      General Commands Manual							  nohup(1)

NAME
nohup - run a command immune to hangups SYNOPSIS
command [arguments] DESCRIPTION
executes command with hangups and quits ignored. If output is not redirected by the user, both standard output and standard error are sent to If is not writable in the current directory, output is redirected to otherwise, fails. If a file is created, the file's permission bits will be set to If output from is redirected to a terminal, or is not redirected at all, the output is sent to EXTERNAL INFLUENCES
Environment Variables determines the language in which messages are displayed. If is not specified in the environment or is set to the empty string, the value of is used as a default for each unspecified or empty vari- able. If is not specified or is set to the empty string, a default of "C" (see lang(5)) is used instead of If any internationalization variable contains an invalid setting, behaves as if all internationalization variables are set to "C". See environ(5). International Code Set Support Single- and multi-byte character code sets are supported. EXAMPLES
It is frequently desirable to apply to pipelines or lists of commands. This can be done only by placing pipelines and command lists in a single file, called a shell script. To run the script using features apply to the entire contents of file. If the shell script file is to be executed often, the need to type can be eliminated by setting execute permission on file. The script can also be run in the background with interrupts ignored (see sh(1)): file typically contains normal keyboard command sequences that one would want to continue running in case the terminal disconnects, such as: WARNINGS
Be careful to place punctuation properly. For example, in the command form: applies only to command1. To correct the problem, use the command form: Be careful of where standard error is redirected. The following command may put error messages on tape, making it unreadable: whereas puts the error messages into file EXIT STATUS
The following exit values are returned: The command specified by command was found but could not be invoked An error occurred in the nohup utility or the specified command could not be found Otherwise, the exit status of nohup will be that of the command specified. SEE ALSO
chmod(1), nice(1), sh(1), signal(5). STANDARDS CONFORMANCE
nohup(1)
All times are GMT -4. The time now is 05:28 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy