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! This is Abhilash - A Ruby developer for years, specialised on web development, working as a freelance Ruby Developer. I have experience in other frameworks such as Angular, Sinatra, Laravel etc. Mainly working on Ruby On Rails platform since 2010. This blog is about Ruby, Ruby On Rails and other subjects where I have had a chance to work on. You can contact me here: Abhilash AK

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