Ubuntu – n additional set of information that references more than the man page

command line

In reading some the questions I find some commands I am not familiar with. I will run a man page on the command and reference the other questions entry to get a better understanding of the command. One was about using chkconfig. Sometimes the command line I reference has a switch that is not referenced in the man page. My question is am I missing something or is there an additional set of information that references more than the man page?

Here is an example:

chkconfig --level 3 squid off

--level is not listed in the man page. Using the man I would've used chkconfig --edit and worked it that way. Clearly using --level would be the better choice in this instance but it is not listed as a choice in the man page.

Best Answer

Sometimes you can find more help with chkconfig --help, info chkconfig, or apropos chkconfig.

On this, if you compare the man page for chkconfig on Ubuntu with any other, you'll see that the --level switch seems to have been replaced with the --set switch. While chkconfig on Ubuntu may still use the --level switch, it is not given in the man page, or it is an alias to the --set switch. (The Ubuntu-native equivalent is the update-rc.d command.)