Linux 101 Mark C. Ballew ACES Program Desert Research Institute

Talk Overview What is Linux? OS Layout Using the Command line Editing files Networking with SSH Conclude

What is Linux? History and People Richard M. Stallman No Free Unix Linus Travolds Alan Cox Licensing GPL LGPL BSD

What is Linux? Distribution Concept Free Distributions Fedora Core Debian and Ubuntu Gentoo Slackware Many, many more Commercial Distributions Red Hat Enterprise Suse Yellow Dog

OS Layout File System Layout Ownership Processes Ownership Priority Binary File types Big Endian Little Endian

OS Layout: File ownership Everything is a file chown chmod - demo Owner, Group, Other d rwx rwx rwx

OS Layout: Processes Every process is owned by a user Root ownership Daemon ownership User ownership ps demo

OS layout: Big endian & Little endian Otherwise known as the “NUXI” problem Imagine 1025 stored in binary: Most significant value at lowest storage address (i.e., first) Big-Endian memory Least significant value stored first Little-Endian memory

Using the command line What is a shell? Bash Tcsh Zsh Man(ual) pages cd, ls, rm, mv, cp, ps, mkdir pwd, who, w, gcc, g77, find, whereis

Editors vi Vim Emacs, xemacs Nano OpenOffice Groff, tex, latex dos2unix

Networking with ssh Network security using encryption Ssh – make remote connections Scp – copy remote files Sftp – secure file transfer protocol X11 forwarding using SSH

Conclusion Linux is a free (as in freedom) Unix-like operating system There are many command line tools to learn Documentation in the man pages Many different programs to edit files Ssh is a very useful tool for connecting to remote machines