Linux and Unix
In Unix, what do I do when a file I want to edit in vi says "Line too long"?
In Unix, when the vi editor says “line too long” it’s usually because it was copied up from a Mac...
Unix Cheat Sheets and Tricks
While Unix is an extremely flexible, powerful, and stable operating system, mastering it can requ...
vi editing notes
vi is a Unix text editor that is almost always available, on any Unix or Linux system. Knowing ho...
UNIX Tutorials
Learn UNIX in 10 minutesUNIX Tutorial for BeginnersHow To Look Like A UNIX GuruBest Practices Lea...
How do I keep color output when paginating shell output through less?
Let’s say that you like the color output that comes out of ls (different colors for different fil...
Case-insensitive searching in vi
By default, all searches in vi are case-sensitive. To do a case-insensitive search, go into comma...
Customizing vi
The Unix editor vi lets you customize its behavior in a numer of ways. There are two ways to cust...
lsof, the least talked about Unix tool
Apparently this is one of the least talked about, but most useful Linux/Unix tools.lsof lists inf...
How can I check/verify that Red Hat Enterprise Linux is up-to-date for Daylight Savings Time
As the root user, enter the following at the command line:$ zdump -v /etc/localtime | grep 2007Yo...
finding words in binary files
In Unix the strings -a command will output all the text strings in a binary file.Solaris man page...
Awk Explained
Awk is a Unix tool that can be very useful for dealing with text but can be hard to understand. H...
combining unix stderr output with stdout
The problem is that when I run script x and redirect it to a file, all of the error messages come...
diff and patch
The Ten Minute Guide to diff and patch Using diff and patch
avoiding increasing indents while pasting into vi
When pasting text into a vi editing screen, sometimes you’ll get each line increasingly indented ...
Finding most recently changed files in Unix
How do I find the most recently changed files in a set of subdirectories on Unix or Linux?Answer ...
Advantages of less over more (UNIX)
This article is intended to provided reasons to use the UNIX program less over its predicessor mo...
Reasons to Use Vim over Vi
This page Difference Between VIM and vi goes over some of the advantages of vim over vi. (Note: ...
Useful Commands for Vi
The page is meant to document some of the more useful, but obscure commands in vi. For commands e...
using find and chmod together in Unix
In Unix, if you need to clear up a set of subdirectories to see what permissions or ownership of ...
Location of the sudo log file
The log file contains the commands issued along with the issuers’ user names. Distribution Lo...
Specify section number with Unix man (manual) command
Sometimes, there are multiple man pages under the same name, identified by section numbers. For e...
Manipulating data on Linux
This is an introduction to those using Linux for data analysis for the first time.It came from a ...
How do I extract certain columns from a text file in Unix?
Somehow I can never remember the cut command in Unix. But I occasionally want to remove certain c...
SAS on 64b Ubuntu Linux
This was contributed by a colleague from UCI, Harry Mangalam.Having spent 3 days debugging this, ...
Unix grep, find and maxdepth
I’m writing this so I can find it next time I want to do this, and so my student programmers can ...
PHP Client can break `less`
When you do php through command line (i.e. `php somescript.php`) and you pipe it to less (i.e. `p...
grep tricks
I’ve been using grep (Global Regular Expression Print) to search files on Unix for years and neve...
Bash scripting
Learning Shell Scripting Language: A Guide from Newbies to System Administrator – October 3, 201...
15 Basic ‘ls’ Command Examples in Linux
I learned at least three things from this list, and I’ve been using ls for years.15 Basic ‘ls’ Co...
Thin Client technology - Linux Terminal Server Project HOWTO
The text below was copied with permission from post by Harry Mangalam, UCI, to UC-CSC Mailing Lis...
How to synchronize files and directories from one location to another on Unix
Although tar can be used to synchronize/copy files/directories from one location to another (i.e....
cron job examples
Here are some interesting examples of cron job use. http://www.thegeekstuff.com/2009/06/15-practi...
adding date to bash history command
Coming from Solaris to Linux, one thing I’ve missed for years was that the Linux bash history com...
Command Line Tools to Monitor Linux Performance
If you have any tools for monitoring Linux, or have comments or limitations on these, please add ...
Linux scp command examples
I’ve used scp for years, but didn’t know many of these options. The compress-before-transferring...
Linux tee command
The Linux “tee” command is extremely useful in the right situation. This article gives some good ...
Linux performance analysis in 60 seconds
Here’s an intro to understanding what’s going on with a Linux server, quickly.http://techblog.net...
Ruby one-liner to count logins in Linux last command
count logins in last commandIf you want to take the output of the Linux last command, and get a c...