Got Root - Should You Use It?

vegthura asks: "I have several coworkers that insist that logging into servers is an acceptable practice. They claim it's just easier than using sudo and it's just as safe - you know you're root so what else do you need? And why bother logging in as you if you're just going to use sudo to run commands with root privileges anyway? Everything I've ever read has been the exact opposite philosophy. There is very little you need to be root to do, if anything in practice, and using sudo lets you only use the power of root for when you really need it. So, die hard unix geeks, you've got root... do you use it or stick to sudo?"

Comments

More than just root

[Sentry21]

Using sudo provides a host of benefits besides giving you root. Sudo allows you to grant access to specific users for specific commands, and then revoke those commands later. Compare this with giving the root password to everyone, which requires the password to be changed whenever someone leaves the company (or someone's root privs are revoked).

I can grant access via sudo to users for specific commands, without giving them complete administrative access to the entire system.

When I'm using 'sudo' to do things, my environment stays the same. This means that my $PATH variable stays the same, and so does my prompt. It means that any time I say ~ it refers to /home/myusername and not /root, meaning I can get to it later.

When I'm not using sudo and I do 'cd /var/www/certs/domainname/' and it doesn't give me an error, I know that the permissions are wrong on that directory (more of a reminder than anything). I've gotten so used to this on most systems that the series of commands I use to access the IMAP virtualhost directory is essentially 'cd /var/spool/postfix/virtual; sudo bash; cd /var/spool/postfix/virtual', which slows me down surprisingly not much.

It doesn't take much to hit the up arrow, Ctrl-A, type 'sudo ' and then hit enter if you find you need to.

I can set in ~/.bash_profile that I want rm to use -i by default (alias rm='rm -i') for safety, which carries over into my 'sudo' environment; doing this for root by default can cause e.g. cronjobs to hang, waiting for input that will never come.

The benefits of sudo are not limited to 'gaining root' - they are multitudinous, and apparently your coworkers have never considered versatility to be a benefit; nor, for that matter, have they done likewise for security. Perhaps they should be educated.

Re:Use sudo rarely?

[techno-vampire]

Maybe I am missing something somewhere, but the 'use sudo if you absolutely need root' is crap.

You are. The right way to say it is, "Use sudo if you only need to run one command as root; log in as root only when you're going to need to do a number of things that require root."

As a side-note, somebody upstream noted that sudo doesn't change your environment, but becoming root does. If you don't need root's environment, just use su, instead of "su -" and you keep your current location, $PATH and other things.