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Start \ Stop webserver from command line
http://forums.linhes.org/viewtopic.php?f=17&t=18515		 Page 1 of 1
Author:  gatorback [ Fri Jul 11, 2008 6:25 pm ]
Post subject:  Start \ Stop webserver from command line
I am pointing my web browser to my KM machine and it does not return a web page. I would like to be able to perform the following tasks from SSH:

1) query the webserver's status (running \ stopped)
2) start \ stop the webserver

I am assuming that the problem is with the webserver (it was working yesterday). In addition I am also assuming that if I can ping 'mythtvhost' from a dosprompt, IE7 (DNS) is able to resolve the IP address. Any suggestions to address the tasks above or diagnose the issue are appreciated. Thank you.
Author:  ceenvee703 [ Fri Jul 11, 2008 6:33 pm ]
Post subject: 
1) use the command
Code:
ps -ef | grep apache2


2) as root
Code:
/etc/init.d/apache2 stop
/etc/init.d/apache2 start


(or just "/etc/init.d/apache2 restart" to do the same thing as a stop/start)
Author:  gatorback [ Fri Jul 11, 2008 7:17 pm ]
Post subject: 
I tried rebooting the mythtvhost server and noticed that during the boot sequence that there was something wrong with the apache service. If memory serves, there was a message similar to this:

Quote:
Remove it before continuing if it is corrupted.


I tried the commands (thank you) from ceenvee703:

Code:
root@mythtvhost:~#  ps -ef | grep apache2
root      3421  3318  0 21:09 ttyp0    00:00:00 grep apache2
root@mythtvhost:~# /etc/init.d/apache2 stop
Stopping web server (apache2)...(20014)Internal error: Error retrieving pid file /var/run/apache2.pid
Remove it before continuing if it is corrupted.
 failed!
root@mythtvhost:~# /etc/init.d/apache2 start
Starting web server (apache2)...(20014)Internal error: Error retrieving pid file /var/run/apache2.pid
Remove it before continuing if it is corrupted.
 failed!
root@mythtvhost:~#  ps -ef | grep apache2
root      3480  3318  0 21:10 ttyp0    00:00:00 grep apache2
root@mythtvhost:~# kill 3318
root@mythtvhost:~#  ps -ef | grep apache2
root      3482  3318  0 21:10 ttyp0    00:00:00 grep apache2


Not sure that I used the kill command correctly. Am I on the right track to restoring webserver functionality or are there additional diagnostic tests needed before determining a course of action? Thank you!


I have used RH's service command like this:
Code:
[root@flamingo init.d]# ls ht*
httpd.vmware
[root@flamingo init.d]# service httpd.vmware status
httpd (pid 4110 4106 4098 4094) is running...
[root@flamingo init.d]#
Author:  tjc [ Fri Jul 11, 2008 7:33 pm ]
Post subject: 
So do like the messages tell you and remove the pid file.

0) Become root - http://www.knoppmythwiki.org/index.php?page=BecomeRoot

1) First make sure that the server is not running:
Code:
pkill -9 -fl apache

2) Then remove the file:
Code:
rm -f /var/run/apache2.pid

3) Then restart the server:
Code:
/etc/init.d/apache2 start
Author:  gatorback [ Fri Jul 11, 2008 9:13 pm ]
Post subject: 
Thanks for the suggestions tjc. Much appreciated. I tried them and found this:

Quote:
root@mythtvhost:/etc/init.d# apache2 start
Usage: apache2 [-D name] [-d directory] [-f file]
[-C "directive"] [-c "directive"]
[-k start|restart|graceful|graceful-stop|stop]
[-v] [-V] [-h] [-l] [-L] [-t] [-S]
Options:
-D name : define a name for use in <IfDefine name> directives
-d directory : specify an alternate initial ServerRoot
-f file : specify an alternate ServerConfigFile
-C "directive" : process directive before reading config files
-c "directive" : process directive after reading config files
-e level : show startup errors of level (see LogLevel)
-E file : log startup errors to file
-v : show version number
-V : show compile settings
-h : list available command line options (this page)
-l : list compiled in modules
-L : list available configuration directives
-t -D DUMP_VHOSTS : show parsed settings (currently only vhost settings)
-S : a synonym for -t -D DUMP_VHOSTS
-t -D DUMP_MODULES : show all loaded modules
-M : a synonym for -t -D DUMP_MODULES
-t : run syntax check for config files


I ended up using this:

Code:
root@mythtvhost:/etc/init.d# apache2 -k start


Note: had to remove the -l option when issuing the pkill command. Apparently it only works with pgrep.

root@mythtvhost:
Code:
/etc/init.d# pkill -9 -f apache2

root@mythtvhost:/etc/init.d#
Code:
ps -ef | grep apache2

root 4794 4764 0 23:09 ttyp4 00:00:00 grep apache2
root@mythtvhost:/etc/init.d# ps -ef | grep apache2
root 4806 4764 0 23:09 ttyp4 00:00:00 grep apache2
root@mythtvhost:
Code:
/etc/init.d# /etc/init.d/apache2 start

Starting web server (apache2)....
root@mythtvhost:/etc/init.d# ps -ef | grep apache2
root 4811 1 0 23:09 ? 00:00:00 /usr/sbin/apache2 -k start
www-data 4812 4811 0 23:09 ? 00:00:00 /usr/sbin/apache2 -k start
www-data 4813 4811 0 23:09 ? 00:00:00 /usr/sbin/apache2 -k start
www-data 4814 4811 0 23:09 ? 00:00:00 /usr/sbin/apache2 -k start
www-data 4815 4811 0 23:09 ? 00:00:00 /usr/sbin/apache2 -k start
www-data 4816 4811 0 23:09 ? 00:00:00 /usr/sbin/apache2 -k start
root 4822 4764 0 23:09 ttyp4 00:00:00 grep apache2
Author:  tjc [ Sat Jul 12, 2008 12:19 am ]
Post subject: 
gatorback wrote:
Thanks for the suggestions tjc. Much appreciated. I tried them and found this:

Code:
root@mythtvhost:/etc/init.d# apache2 start

Sigh...
Code:
root@black2:~# type -p apache2
/usr/sbin/apache2

This is not the same. If somebody tells you to run an init script you'll notice that they _always_ tell you to use the full path, e.g. "/etc/init.d/something"

- As root '.' is not and should never be in your path for safety reasons.
- The /etc/init.d directory is also not in your path for very good although more subtle reasons. (Init scripts very often have the same name as the daemon process they start.)
- When you're given a full path for something there is usually a reason...
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