UNIX : How to ignore lines with certain names

Sometimes we need to ignore multiple lines with certain words and get the list out of the file. usually it will be a log file to read . The below grep command can be used to ignore multiple words present in a text file.

Lets say the file contain

$ cat list.txt
apple
orange
apple
banana
papaya

Now we need to ignore line with orange , banana and papaya . So we can use the below grep command.

$ cat list.txt | grep -Ev "orange|banana|papaya"
apple
apple

It will ignore lines with the words in -v part of grep.

Comments

Pokemon Go download link

Pokemon go has become the buzz word in tech industry now. Nintendo, the Japanese video game company are the creates of this game. Its first of it kind to integrate a game with augmented reality , so people has to go out to real world with there android or iPhone to catch em all . You can download Pokemon go from this link.

How to share blog post ?

Hi.I will show you how to add social network sites icon to your blog post in Blogger.For that follow the steps. 1. Login to your Blogger. 2.Go to design tab. 3.Take Edit HTML tab. 4.You my expand the widget option.Give the check option on ' Expand Widget Templates' 5.Find the tag <data:post.body/>

UNIX : Using case in shell scripting

The below example shows how to use case statement in bash scripting. #!/bin/bash value=123 #We can give the expected value to this variable. case ${ value } in 2) echo "2" ;; apple) echo "apple" ;; a|b|c) echo "Input value is $val" ;; [Yy][Ee][Ss]) echo "Yes" ;; [5-9]*) echo "A value between 5 and 9 inclusive" *) echo "Some other value" ;; esac

Tech Info Talks

Search This Blog