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How To Use Bold Font in Ubuntu Terminal with Echo and Cat Commands

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In the world of Ubuntu, the terminal is a powerful tool that allows you to interact with the system using text-based commands. One of the ways you can enhance your terminal experience is by using different font styles and colors. In this article, we will focus on how to use bold font in the terminal using the echo and cat commands.

Quick Answer

To use bold font in the Ubuntu terminal with the echo command, you can use escape sequences like 3[1m to start the bold font and 3[0m to reset it back to normal. Alternatively, you can use the tput command with echo to enable and reset the bold font. However, the cat command alone cannot display text in bold, but you can achieve a similar effect by using command substitution with echo -e.

Understanding Terminal Commands

Before we dive into the specifics of using bold font, it’s important to understand what the echo and cat commands do.

  • echo: This command is used to display a line of text or string on the standard output or a file. It’s often used in shell scripts and batch files to output status text to the screen or a file.
  • cat: Short for “concatenate,” this command is used to display the contents of a file. It can also be used to create a file, combine files, and more.

Using Bold Font with Echo Command

Echo Command and Escape Sequences

One way to make your text appear in bold in the terminal is by using escape sequences with the echo command. Here’s how you can do it:

echo -e "Normal text \033[1mBold text\033[0m Normal text"

In this command, -e is an option that enables the interpretation of escape sequences. \033[1m is the escape sequence to start the bold font and \033[0m is the escape sequence to reset the font back to normal.

Echo Command and Tput

Another way to make your text bold is by using the tput command with echo. The tput command is a more portable way to manipulate terminal attributes. Here’s an example:

echo "$(tput bold)Bold text$(tput sgr0) Normal text"

In this command, tput bold enables the bold font and tput sgr0 resets the font style back to normal.

Using Bold Font with Cat Command

Unfortunately, the cat command alone cannot display text in bold. However, you can achieve a similar effect by using command substitution with echo -e. Here’s how you can do it:

echo -e "Normal text \033[1m$(cat file.txt)\033[0m Normal text"

In this command, $(cat file.txt) is a command substitution that gets replaced with the output of the cat file.txt command. The -e option and the escape sequences work the same way as explained in the previous section.

Conclusion

Using bold font in the Ubuntu terminal can make your scripts more readable and your terminal experience more enjoyable. Whether you choose to use escape sequences with echo or the tput command, the process is quite straightforward. Happy coding!

For more information, you can refer to the “Colorizing” Scripts tutorial, tput(1) man page, and ncurses(3) man page.

Can I use bold font in the Ubuntu terminal?

Yes, you can use bold font in the Ubuntu terminal by using escape sequences with the echo command or by using the tput command with echo.

How can I use bold font with the `echo` command?

You can use escape sequences with the echo command to make your text appear in bold. For example, you can use \033[1m to start the bold font and \033[0m to reset the font back to normal.

Is there another way to use bold font with the `echo` command?

Yes, you can also use the tput command with echo to make your text bold. For example, you can use $(tput bold) to enable the bold font and $(tput sgr0) to reset the font style back to normal.

Can I use bold font with the `cat` command?

No, the cat command alone cannot display text in bold. However, you can achieve a similar effect by using command substitution with echo -e.

How can I use bold font with the `cat` command?

To use bold font with the cat command, you can use command substitution with echo -e. For example, you can use echo -e "Normal text \033[1m$(cat file.txt)\033[0m Normal text" to display the content of a file in bold.

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