Operating System Environment: Red Hat 5, details:
# Uname-
Linux machine1 2.6.18-164. el5xen #1 SMP Tue Aug 18 15:59:52 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux
# Cat/etc/RedHat-release
Red Hat Enterprise Linux Server Release 5.4 (tikanga)Apache, or httpd, version:
#/Usr/sbin/httpd-V
Server version: Apache/2.2.3
Server built: Jul 15 2009 09:02:25
Or
#/Usr/sbin/apachectl-V
Server version: Apache/2.2.3
Server built: Jul 15 2009 09:02:25 I have been talking about Apache or httpd before;
In fact, httpd is a service, and Apache is a trademark;
Just like pure water is a product, while Wahaha is a brand;
But because Apache is too famous, it seems that Apache is talking about the HTTPd service.
Therefore, we will only talk about the HTTPd service later. /Usr/sbin/apachectl is actually a script;
/Usr/sbin/httpd
Is the real program; Next, how do I start the HTTPd service?
Script startup:
#/Usr/sbin/apachectl start
[Root @ radius guoq] # ps-Ef | grep Apache
Apache 6680 6679 0? 00:00:00/usr/sbin/httpd-K start
Apache 6681 6679 0? 00:00:00/usr/sbin/httpd-K start
Apache 6682 6679 0? 00:00:00/usr/sbin/httpd-K start
Apache 6683 6679 0? 00:00:00/usr/sbin/httpd-K start
Apache 6684 6679 0? 00:00:00/usr/sbin/httpd-K start
Apache 6685 6679 0? 00:00:00/usr/sbin/httpd-K start
Apache 6686 6679 0? 00:00:00/usr/sbin/httpd-K start
Apache 6687 6679 0? 00:00:00/usr/sbin/httpd-K start
Root 6689 5393 0 00:00:00 pts/1 grep Apache
Stop is #/usr/sbin/apachectl stop; You are right; If you read the script/usr/sbin/apachectl, you will find two secrets:
1. parameters accepted by the script
Start, stop, restart, and
Graceful, graceful-stop;
2. In fact, the script still passes the parameter
/Usr/sbin/httpd; Therefore, we can
#/Usr/sbin/httpd-K start
Start the service;
#/Usr/sbin/httpd-K stop
Stop the service; The following answers how to start the instance at startup?
If you search
# Find/-name "httpd"
/Var/log/httpd
/Usr/sbin/httpd
/Usr/lib64/httpd
/Etc/rc. d/init. d/httpd
/Etc/logrotate. d/httpd
/Etc/httpd
/Etc/sysconfig/httpd
/Home/guoq/osrc/tcl8.4.19/tests/httpd
/Opt/soft/httpd-2.2.14/httpd
/Opt/soft/httpd-2.2.14/. libs/httpd
/Opt/apache2.2.14/bin/httpd We will find that Apache has prepared the boot script for us,
/Etc/rc. d/init. d/httpd You can check whether it is in the boot list:
# Chkconfig -- list | grep httpd
Httpd 0: Close 1: Close 2: Close 3: Close 4: Close 5: Close 6: Close If needed, you can add it to the startup list:
# Chkconfig -- add httpd
Or, delete from the boot list:
# Chkconfig -- del httpd
In my system, it is already in the boot list:
Httpd 0: Close 1: Close 2: Close 3: Close 4: Close 5: Close 6: Close
But it is not allowed to start automatically I want it to start automatically at the current running level. I recently learned Java and PHP;
# Chkconfig -- level 5 httpd on
# Chkconfig -- list httpd
Httpd 0: Disabled 1: Disabled 2: Disabled 3: Disabled 4: Disabled 5: Enabled
6: Disable Wait, how do I know my running level?
# Runlevel
N 5 The full text is complete.
I don't know why the above method cannot run on my Ubuntu, So I went online and looked for it again.
Find the following method: 1) Add the program script to the/etc/init. d directory.
Sudo CP/home/cnscn/my_servd/etc/init. d/
2) Add to startup list
Sudo update-rc.d my_servd defaults 3) The following connections are generated:
Adding system startup for/etc/init. d/my_servd...
/Etc/rc0.d/k20my_servd-> ../init. d/my_servd
/Etc/rc1.d/k20my_servd-> ../init. d/my_servd
/Etc/rc6.d/k20my_servd-> ../init. d/my_servd
/Etc/rc2.d/s20my_servd-> ../init. d/my_servd
/Etc/rc3.d/s20my_servd-> ../init. d/my_servd
/Etc/rc4.d/s20my_servd-> ../init. d/my_servd
/Etc/rc5.d/s20my_servd-> ../init. d/my_servd 4) Specify the startup and shutdown levels (20 indicates a level) (note the following.
)
Sudo update-rc.d my_servd start 20
3 4 5.
Start at level 3, 4, and 5
Sudo update-rc.d my_servd start 20
0 1 2 6.
Close at level 3, 4, and 5
Or
Sudo update-rc.d my_servd start 20 3 4 5.
Stop 20 0 1 2 6.
5) Remove the service
Sudo update-rc.d-F my_servd remove I tried it. It seems I can !! |
