slide7_grep_sed.txt

• Count number of “erors” messages in sample.txt

vagrant@vagrant-ubuntu-trusty-64:~$ vi sample.txt
vagrant@vagrant-ubuntu-trusty-64:~$ cat sample.txt 
This is the first line of an example text.
It is a text with erors.
It is a text with erors.
Lots of erors.
So much erors, all these erors are making me sick.
This is a line not containing any errors.
This is a line not containing any errors.
This is the last line.
vagrant@vagrant-ubuntu-trusty-64:~$ grep -o -i erors sample.txt | wc -l
5

• Correct all mistakes on the file
vagrant@vagrant-ubuntu-trusty-64:~$ sed 's/erors/errors/g' sample.txt
This is the first line of an example text.
It is a text with errors.
It is a text with errors.
Lots of errors.
So much errors, all these errors are making me sick.
This is a line not containing any errors.
This is a line not containing any errors.
This is the last line.

• Delete all spaces from the sample.txt file.

vagrant@vagrant-ubuntu-trusty-64:~$ sed 's/[[:space:]]//g' sample.txt > no-spaces.txt
vagrant@vagrant-ubuntu-trusty-64:~$ cat no-spaces.txt 
Thisisthefirstlineofanexampletext.
Itisatextwitherors.
Itisatextwitherors.
Lotsoferors.
Somucherors,alltheseerorsaremakingmesick.
Thisisalinenotcontaininganyerrors.
Thisisalinenotcontaininganyerrors.
Thisisthelastline.
vagrant@vagrant-ubuntu-trusty-64:~$