Centos 7 startup script

byran cheung · 03-05-2015, 01:46 AM

I have a Centos 7 server which setup by previous system administrator , when this server startup , it will start some service eg. apache , mysql etc, but I could not find the startup script at /etc/rc.local /etc/rc.d/rc.local or /etc/rc.d/init.d , would advise which path will be the startup script keep ?

Thanks

pan64 · 03-05-2015, 02:11 AM

probably in /etc/rcX.d where X is the current runlevel (a number)

byran cheung · 03-05-2015, 02:23 AM

thanks reply,

checked , in /etc/rc3.d , there are the below files , but it do not have apache , mysql startup.

lrwxrwxrwx. 1 root root 17 Nov 29 22:26 S10network -> ../init.d/network
lrwxrwxrwx. 1 root root 17 Nov 29 22:26 S21iprdump -> ../init.d/iprdump
lrwxrwxrwx. 1 root root 17 Nov 28 22:29 S20iprinit -> ../init.d/iprinit
lrwxrwxrwx. 1 root root 19 Nov 28 22:29 S20iprupdate -> ../init.d/iprupdate
lrwxrwxrwx. 1 root root 20 Nov 28 22:27 K50netconsole -> ../init.d/netconsole

pan64 · 03-05-2015, 02:41 AM

and what about the other rcX.d directories?

byran cheung · 03-05-2015, 02:46 AM

Quote:

Originally Posted by pan64

and what about the other rcX.d directories?

the default runlevel is 3 , so I check rc3.d directory.

byran cheung · 03-05-2015, 03:23 AM

I find the httpd service could be restart by systemctl
# systemctl restart httpd.service

But I could not find mysql by the following command .

#systemctl |grep mysql

naitso · 03-05-2015, 06:23 AM

hi, check systemd documentations

byran cheung · 03-05-2015, 07:52 PM

Quote:

Originally Posted by naitso

hi, check systemd documentations

thanks reply ,

I check systemd document , I found the httpd.service but do not find how mysql could be started , would advise how the mysql service is started ? thanks

Doug G · 03-05-2015, 09:42 PM

Centos 7 uses systemd to control daemons with the user tool systemctl

The default database is mariadb, replacing mysql, so systemctl start mariadb.service should start mariadb. You might want to run mysql_secure_installation as soon as you get the database started.

byran cheung · 03-06-2015, 12:05 AM

Quote:

Originally Posted by Doug G

Centos 7 uses systemd to control daemons with the user tool systemctl

The default database is mariadb, replacing mysql, so systemctl start mariadb.service should start mariadb. You might want to run mysql_secure_installation as soon as you get the database started.

thanks reply ,

yes , I know centos comes with mariadb .

what I want is to know how my existing server ( installed by previous colleagues) start mysql db at startup , I could not find how it could be start at bootup .

thanks

byran cheung · 03-06-2015, 01:13 AM

may be I have a bit confuse , I just the service is as below , it is mysql or mariadb ? the service is started when reboot .

mysql 1681 1 0 Feb01 ? 00:00:00 /bin/sh /usr/bin/mysqld_safe --basedir=/usr
mysql 2011 1681 0 Feb01 ? 00:00:42 /usr/libexec/mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib64/mysql/plugin --log-error=/var/log/mariadb/mariadb.log --pid-file=/var/run/mariadb/mariadb.pid --socket=/var/lib/mysql/mysql.sock
root 3891 3364 0 15:09 pts/0 00:00:00 grep --color=auto mysql

Doug G · 03-06-2015, 12:55 PM

systemctl status mariadb.service will tell you if the serveice is running.

Most of the programs for the database are still named mysql. From the command line, you can use mysql, mysqldump, etc. with a mariadb database.

suicidaleggroll · 03-06-2015, 01:58 PM

Quote:

Originally Posted by byran cheung

what I want is to know how my existing server ( installed by previous colleagues) start mysql db at startup , I could not find how it could be start at bootup .

It's systemd, it's a black box. There is probably a mariadb.service entry in /usr/lib/systemd/system which tells systemd how mariadb should be started, but the actual startup is going to be buried inside systemd's innards.