Learning the command line

[DMGrier]

So I am slowly learning the command line, I did start on Ubuntu 8.04 but I only forced myself to learn simple things like installing and removing applications.

I picked up a copy of Ubuntu Unleashed and I am going going through the command line part and I know these thing seem simple but I cannot figure out how to do a pipeline? I have a English USA keyboard layout and was hoping I could get some help. Thanks guys.

[eenofonn]

it's usually "shift + \" right above the enter key which gives you a | which is displayed a bit different on the keyboard.

a good example of pipe "|" would be



ifconfig | less


or something like



cat /proc/meminfo | less


These are just simple examples but give you a good idea of what a pipeline does, piping the output of one command/program into another

[DMGrier]

Just gave it a shot, and it worked. Thanks man for the quick reply.

[eenofonn]

Just gave it a shot, and it worked. Thanks man for the quick reply.

Glad to hear it another fun little tool is ">"

which sends the output to a file:



cat /proc/cpuinfo > ~/cpuinfo.txt


that takes the output of "cat /proc/cpuinfo" and puts it into a new file in your home directory called cpuinfo.txt

[DMGrier]

awesome, I am working on it. I am trying to learn what I can since I am starting college classes this spring for a degree for network security. Just toured the campus and got very excited when I saw the security core classes is taught on Ubuntu machines.

[eenofonn]

awesome, I am working on it. I am trying to learn what I can since I am starting college classes this spring for a degree for network security. Just toured the campus and got very excited when I saw the security core classes is taught on Ubuntu machines.

Nice

[tgalati4]

Add to an existing file:


ls > mydirectorylisting.txt; ls -la >> mydirectorylisting.txt
cat mydirectorylisting.txt

Common pipe commands that I use:


dmesg | more
dmesg | tail -50
ps -ef | more
dmesg | grep BogoMIPS
ps -ef | grep syslog

[NikiNfOuR]

I am new at command line myself!! if you haven't got this get this command line learning book that covers everything about terminal :)

http://linuxcommand.org/tlcl.php