Linux — sed & awk command and crontab

The purpose of this hands-on training is to teach you how to use sed & awk commands and crontab.

Learning Outcomes

At the end of the this hands-on training, you will be able to;

• use sed & awk command and crontab.

Outline

• Part 1 — sed command
• Part 2 — awk command
• Part 3 — crontab

Part 1 — sed command

• Sed is a stream editor. A stream editor is used to perform a lot of function on a file like searching, find and replace, insertion or deletion.
• Create a folder and name it sed-awk-command.

mkdir sed-awk-command && cd sed-awk-command

• Create a file named sed.txt.

Linux is an OS. Linux is life. Linux is a concept.
I like linux. You like linux. Everyone likes linux.
Linux is free. Linux is good. Linux is hope.

Replacing or substituting string

The following sed command replaces the word “linux” with “ubuntu” in the file.

sed 's/linux/ubuntu/' sed.txt

• s specifies the substitution operation.
• The / are delimiters.