Programming in UNIX Environment : Commands – sort, tail, cmp, diff

The command ‘sort’ is for sorting the line of the text. ‘tail’ prints the last ten lines of the file. ‘cmp’ for showing the difference between the files. It shows only the first difference. But ‘diff’ shows all the difference between two files.

sort filename1 file2
sort -r // reverse normal order.
sort -n // numeric order.
sort -f // fold upper and lower case together.
sort -b // Ignore the leading blanks.

tail filename // prints last 10 lines.
tail -3 filename // print last 3 lines.

cmp filename1 filename2 // prints only the 1st difference.

diff filen1 filen2 // prints all differences.

pwd – For printing current working directory.
cp – For copying a file.

cp /home/abhi/Pclass/num.c num.c

ed /home/abhi/Pclass/num.c

Author: Abhilash

Hey! My name is Abhilash - A Ruby developer for years, specialised on web programming, working as a freelancer. Mainly working on Ruby On Rails platform since 2010. This blog is about Ruby, Ruby On Rails and other subjects that I work. You can contact me here: abhilash.amballur@gmail.com Abhilash AK

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s