One Liner Examples

Customer Ticket 1#

You can use the following one-liner to create 10 files named Report1, Report2, …, Report10 in your home directory:

touch ~/Report{1..10} && date && ls ~/Report*

&& or ;#

&& (Logical AND)

• && is used to chain commands, but the second command only runs if the first command is successful. It is typically used when you want to run the next command only if the previous command succeeds.

; (simicolon)

• The semicolon ; runs the commands in sequence, regardless of whether the previous command succeeds or fails.

Customer Ticket 2#

mkdir /home/student/marketing && mv /home/student/Report* /home/student/marketing/ && touch /home/student/marketing/ReadMe&& echo "Reports for each year will be organized into directories named for each corresponding year - ell" > /home/student/marketing/ReadMe

But can I make it shorter?

You can simplify this one-liner by using tilde ~ to represent /home/student and combining the commands in a more concise way:

mkdir ~/marketing && mv ~/Report* ~/marketing/ && echo "Reports for each year will be organized into directories named for each corresponding year - ell" > ~/marketing/ReadMe && cat ~/marketing/ReadMe

Customer Ticket 3#

rm ~/Report{2..10} && mv ~/Report1 ~/SeptemberReport && ls -l ~/

Creating a symlink

ln -s /path/to/original/file /path/to/symlink

Redhat Chapter 3#

Task: Create a Directory Thesis, subdirectories Chapter 1 - Chapter5 and inside of Thesis/Chapter4 create a file called lesson1.

mkdir -p Thesis/Chapter{1..5} && touch Thesis/Chapter3/lesson1 && ls -R Thesis