Category Archives: Basics
vi editor , pronounced as Vee Iee editor is the default text editor in Unix and Linux distribution. For new learners it may be difficult to get used to vi editor commands. To make this easy here is the vi editor cheat sheet in PDF format which can be printed, shared and used for ready reference.
vi editor Cheat Sheet in PDF format.
Here is an earlier article which discus vi editor in details
If you want to learn new computer programming language or upgrade current skills you can safely pick of the top 10 programming languages which are highest in demand . For companies thinking of migrating or developing software solutions in new programming languages for their new or current setup one of these languages will be a good choice. Continue reading to learn about top 10 programming languages.
Bash is a Unix/Linux command interpreter (shell). Bash is the Bourne Again SHell created as part of GNU Project. Bash is an Bourne shell compatible shell that incorporates useful features from the Korn shell (ksh) and C shell (csh). It offers functional improvements over Bourne shell for both programming and interactive use. In addition, most Bourne shell scripts can be run by Bash without modification. Bash is intended to conform to the IEEE POSIX P1003.2/ISO 9945.2 Shell and Tools standard.
Bash was originally written by Brian Fox of the Free Software Foundation. The current developer and maintainer is Chet Ramey of Case Western Reserve University.
The improvements offered by Bash include:
- Command line editing
- Unlimited size command history
- Job Control
- Shell Functions and Aliases
- Indexed arrays of unlimited size
- Integer arithmetic in any base from two to sixty-four
Here are the top 10 Bash Programming Guides, Reference & Tools
Control M ( ^M) characters are introduced when you use lines of text from a windows computer to Linux or Unix machine. Most common reasons are when you directly copy a file from a windows system or submit form data copied and pasted from a windows machine.
Detecting ^M characters
^M is non printable character and often becomes difficult to find, in order to see if your file contains any non printable character use the cat command with -v option
$cat -v filename
Methods to remove ^M
In all these method , real secret is not to type ^M using keyboard but rather typing in control key sequence to get the ^M control character.