Because Ubuntu has a mix of utilities to manage packages I constantly seem to be forgetting the options I need when I go to do basic package management. Mostly for my sake are the ones I use most regularly:

List installed packages:

List names of available packages (including those not installed):

Tell what . . . → Read More: Ubuntu package commands

Sometimes you need the service tag or model off a Dell server that isn’t in your possession. You can either find some feet on the street to do it or as it turns out, with Linux, you can use “dmidecode”:

Thanks to Brandon Checketts’ website for this tidbit.

In the old days when using “sendmail” if you wanted to watch the SMTP conversation between the local host and the next mail relay all you’d have to do is either run “sendmail -v” or “mail -v” (or “mailx -v” depending on the OS). It would then output the entire SMTP conversation with the remote . . . → Read More: Testing “sendmail” with immediate delivery