10 example of using Vim or VI editor in UNIX and Linux

Vim or VI editor tutorial in UNIX

VI Editor is like notepad in UNIX but it’s extremely powerful and have sophisticated feature to work as complete IDE. No matter which version of UNIX you are working or which flavor you are using you always find either VI editor or VIM there. VI is a very large topic and I am not covering every aspect of it what I am sharing here is some examples of using VI editor in UNIX or Linux. most of the time we use only 10% of VI editor and never know 90% of it , to be frank I also don't know many of VI feature by heart but I always search for it , see people working in VI and learn from there experience as well. after working on VI editor what I found that every day we learn something new in VI editor but we  forget something equally important and there I thought lets document whatever VI commands I have learned so far and using regularly. Idea is to keep this VI Editor tutorial updated with every single useful VI commands I learn and I also ask you guys to contribute with something useful. If you see 10 peoples working in VI editor you realize that they use it differently then use some new VI commands which you are not familiar of and which could improve your productivity as well. so if you would like to know more and more about VI editor I would suggest observe people around you when they work in VIM or VI editor and learn from there experience. Don’t confuse with both VIM and VI, VIM stands for VI improved and has some more feature than VI editor. Many a times you will find that VI command is aliased to VIM to make it default editor in UNIX.

Read more »

Read More..

Dennis Ritchie Creator of C language and Unix has passed away

I just come to know about this sad news that Dennis Ritchie passed away, It is second blow to technology world after Steve jobs who has recently passed away. Dennis Ritchie is the first programming figure I come to know when I started my programming classes in C and C++ and thats why when I heard this news I feel sad about it and suddenly I remember my programming days and I thought about this post to pay my tribute and remember him.

There is lot of Great information available on Dennis Ritchie in web and Wikipedia but two of its main contribution is:

1) C Programming language, which is still number one after Java.

2) His Contribution in UNIX Operating System which is best Server Operating system available.

3) Author of book

• The C Programming Language (1978 with Brian Kernighan; see K&R)
• Unix Programmers Manual (1971)

Let’s remember this programming genius and pay 2 minute tribute to him, without his C language and immense contribution to programming language, community will never forget him.

May god rest his soul in piece.

Read More..

How to Find Runtime of a Process in UNIX and Linux

So you checked your process is running in Linux operating system and it's running find, by using ps command. But now you want to know, from how long process is running, What is start date of that process etc. Unfortunately PS command in Linux or any UNIX based operating system doesn't provide that information. But as said, UNIX has commands for everything, there is a nice UNIX tip, which you can use to check from how long a process is running. It’s been a long time, I have posted any UNIX or Linux command tutorial, after sharing some UNIX productivity tips . So I thought to share this nice little tip about finding runtime of a process in UNIX based systems e.g. Linux and Solaris. In this UNIX command tutorial, we will see step by step guide to find, since when a particular process is running in a server.

Read more »

Read More..

10 examples of Date command in Unix

Date command in unix or Linux is one of important command to learn and master because we always need date information. no matter you want to know current date in unix or your bash script needs current date in unix for archiving purpose you need to use date command. In its simplest format date command shows the current date and time in unix while with sophisticated option we can extract many useful information from unix date command. In this Unix command tutorial  we will see some useful tips on using date command in unix and learn more around date in unix and Linux. One important thing to note is that different implementation of unix date command may not be exactly same e.g. AIX version of date command doesn't support option "-d" or "date". Anyway let's see some example of unix date command:

By the way this is fifth article in my series of covering examples of important and frequently used commands e.g. find examples, grep examples, chmod example and sort command example.

Read more »

Read More..