New To Linux?

**shn** · 02-26-2004, 10:55 PM

A few tips.

It's a good idea to add yourself in the /etc/sudoers file

Code:

# User privilege specification
root &nbsp; &nbsp;ALL=&#40;ALL&#41; ALL
shn &nbsp;ALL=&#40;ALL&#41; ALL

Once a user has been authenticated, a timestamp is updated and the user may then use sudo without a password for a short period of time (5 minutes by default).

You can install binary RPMS with sudo command as a local user. You can also run any binary programs that require root priveleges.

Just add the sudo command to it, like this:

sudo ./binary-executable

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If you have many terminals open using the $PS1 variable can help you keep track of them. It also might help you prevent making mistakes as root.

For example:

PS1="[\[\033[1;31m\]\u\[\033[0m\]@\h \W]\$ "

Add the above to your /root/.bashrc file. Every time you are logged in as root, the terminal will display "root" in red.

The actual color code is "1;31" inside the PS1 variable. The 1 says make it bold, and the 31 says the color (red). Other colors are:

1;30 Black
1;32 Green
1;33 Yellow
1;34 Blue
1;35 Magenta
1;36 Cyan
1;37 White#white

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To change the default behaviour of Ctrl-Alt-Del, edit /etc/iniitab and look for ctrlaltdel

The last parameter is the command to execute when you press Ctrl-Alt-Del

For example, you can shutdown your machine with:

ca::ctrlaltdel:/sbin/shutdown -t3 -h now

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Easy way to set a reminder for yourself, while working in the command line:

( sleep 10 && echo -e "Tea is ready\a" ) &

10 is a number of seconds to wait until the alarm, "-e" argument to echo forces it to see the "\a" sequence, which is an alarm bell.

Hope I did not miss anything, if so let me know

**LSA** · 02-26-2004, 11:09 PM

Wow, good ones, I never even knew you could do most of those

Ok another tip:

If you have a "winmodem" and want it to work in linux, go to http://www.linmodems.org

Another one:

Turn off unneeded services too save memory, they are usually in /etc/inetd.conf and /etc/rc.d/init.d/. In most distros there is a config tool to turn these off too.

BTW, I'm not sure if thats the config files or not, so if i'm wrong tell me

**LSA** · 02-27-2004, 01:33 AM

Tip: There is a 'hosts' file just like there is in windows, you can do that same things you can do with the hosts file in windows. It is in /etc/hosts

**LSA** · 02-28-2004, 06:08 PM

we got pinned

Tip:You can use 'xkill' to kill a program quickly, just type in xkill in a run box or terminal, then click on the window of the program you want to kill

Tip:Type in 'ulimit -a' in a terminal to see the limits for the user you are currently logged in as.

I'll think of some more later