In this article, let us review how to use Unix tac command, rev command, paste command, and join command with practical examples.
Question: Is it possible for me to combine multiple sed commands? Can I combine two sed commands and execute it as single sed command?
Answer: In our previous articles we learned sed with single commands — printing, deletion, substitute and file write.
In this article let us review how to combine multiple sed commands using option -e as shown below.
Question: I like Vi style of editing and I’m very comfortable with Vi commands. How do i use Vi style line editing in Unix command line?
Answer: Execute set -o vi at your Unix shell to enable Vi style editing.
Debian based systems (including Ubuntu) uses apt-* commands for managing packages from the command line.
In this article, using Apache 2 installation as an example, let us review how to use apt-* commands to view, install, remove, or upgrade packages.
From Vim editor, move your cursor to a number and press Ctrl+A to increase the number or Ctrl+X to decrease the number.
- Ctrl+A to increase the number under cursor
- Ctrl+X to decrease the number under cursor
Question: How do I find out what Unix shell I’m currently running? Can you also explain how can I change my Unix shell both temporarily and permanently? (For example, from bash to tsh).
Answer: You can achieve these using $0, exec, chsh -s. In this article, let us review how to do these in detail.
Question: I would like to understand the basics of how to write and execute a pascal program on Linux OS. Can you explain it with a simple example?
Answer: In this article, let us review very quickly how to write a basic Hello World pascal program and execute *.p or *.pas program on Linux or Unix OS.
This article is part of Unix Sed Tutorial series. In previous articles, we discussed about sed print operation , sed delete operation and sed find and replace.
In this article, let us review how to extract part of one file and write it to another file using sed.