[SOLVED] Moving to CentOS 7

scasey · 09-16-2017, 05:29 PM

My current server is running CentOS 5.11 which, as you know, is past EOL. Additionally the server is starting to throw Northbridge ECC data cache errors occasionally. The hardware is more than 7 years old.

The folks at the data center I use are offering a virtual server running CentOS 7 in their "cloud infrastructure" at a very reasonable rate. I'm concerned about the "different paradigm" of systemd from an administrator/operator point of view and would appreciate any thoughts. (I am researching on my own, of course, but any pointers would help.)

Does that involve more than learning different commands to do things like restart daemons [/etc/init.d/xxx restart] ? Or does it even involve that much? I'm seeing on-line tutorials that continue to use the commands and config files with which I'm already familiar.

Again, any thoughts appreciated.

Thank you.

jsbjsb001 · 09-16-2017, 05:39 PM

Yes, it does involve using some different commands, like for one example;

If I wanted to start the ums service (Universal Media Server), the command would be;

Code:

systemctl start ums

If I wanted to see it's status, the command would be;

Code:

systemctl status ums

Which would give me the following output;

Code:

● ums.service - Universal Media Server
   Loaded: loaded (/etc/systemd/system/ums.service; disabled; vendor preset: disabled)
   Active: active (running) since Sun 2017-09-17 08:00:44 ACST; 16s ago
 Main PID: 12880 (java)
   CGroup: /system.slice/ums.service
           └─12880 java -Xmx768M -Xss2048k -Dfile.encoding=UTF-8 -Djava.net.preferIPv4Stack=true -Djna.nosys=true -classpath ...

Sep 17 08:00:50 localhost.localdomain UMS.sh[12880]: INFO  08:00:50.370 [main] Registering transcoding engine: Audio Hig...elity
Sep 17 08:00:50 localhost.localdomain UMS.sh[12880]: INFO  08:00:50.370 [main] Registering transcoding engine: VLC Web A...gacy)
Sep 17 08:00:50 localhost.localdomain UMS.sh[12880]: INFO  08:00:50.370 [main] Registering transcoding engine: VLC Web V...gacy)
Sep 17 08:00:50 localhost.localdomain UMS.sh[12880]: INFO  08:00:50.373 [main] Registering transcoding engine: DCRaw
Sep 17 08:00:50 localhost.localdomain UMS.sh[12880]: INFO  08:00:50.381 [main] Using address /192.168.43.204 found on ne...p4s0)
Sep 17 08:00:50 localhost.localdomain UMS.sh[12880]: INFO  08:00:50.381 [main] Created socket: /192.168.43.204:5001
Sep 17 08:00:50 localhost.localdomain UMS.sh[12880]: INFO  08:00:50.474 [main] WEB interface is available at: http://192...:9001
Sep 17 08:00:50 localhost.localdomain UMS.sh[12880]: INFO  08:00:50.512 [main] A tiny cache admin interface is available.../home
Sep 17 08:00:50 localhost.localdomain UMS.sh[12880]: INFO  08:00:50.959 [main] Checking shared folder: /multimediavol/Videos
Sep 17 08:00:53 localhost.localdomain UMS.sh[12880]: INFO  08:00:53.713 [main] Universal Media Server is now available f... find
Hint: Some lines were ellipsized, use -l to show in full.

To restart it, the command would be;

Code:

systemctl restart ums

You can see the systemctl man page, for more options.

scasey · 09-16-2017, 05:45 PM

Quote:

Originally Posted by jsbjsb001

Yes, it does involve using some different commands,
[examples snipped]
You can see the systemctl man page, for more options.

Exactly the kind of pointer I needed. Thank you jsbjsb001. Reviewing it online now. The new server should be spun up early next week.