____ _ _
/ ___|| |_ _ __(_)_ __ __ _
\___ \| __| '__| | '_ \ / _` |
___) | |_| | | | | | | (_| |
|____/ \__|_| |_|_| |_|\__, |
|___/
__ _ _ _
/ _| ___ _ __ _ __ ___ __ _| |_| |_(_)_ __ __ _
| |_ / _ \| '__| '_ ` _ \ / _` | __| __| | '_ \ / _` |
| _| (_) | | | | | | | | (_| | |_| |_| | | | | (_| |
|_| \___/|_| |_| |_| |_|\__,_|\__|\__|_|_| |_|\__, |
|___/
How does this work? Well we need to discuss some of the basic text formatting control sequences. These control the style of the text, which includes properties such as emboldening text, underlining, and inverting the terminal printing. The control sequences are as follows: ` \e[ABm –> A decides the pattern, B decides the color.`
\e[1mBOLD\e[0m\e[2mDIM\e[0m\e[3mITALICS\e[0m\e[4mUNDERLINE\e[0m\e[5mBLINK\e[0m\e[6mBLINK\e[0m\e[7mINVERT\e[0m\e[8mHIDES\e[0m\e[21mHIDES BOLD\e[0mSimply prepend with 2 to escape the effect\e[1mTEXT\e[0m\e[1mTEXT\e[0m\e[1mTEXT\e[0m\e[1mTEXT\e[0m\e[1mTEXT\e[0m
Colors:
- 0 Black
- 1 Red
- 2 Green
- 3 Yellow
- 4 Blue
- 5 Magenta
- 6 Cyan
- 7 Light Gray
A quick code to demonstrate most of these things:
for i in {1..8}; do echo -ne "\e[${i}m >>TEXT<< \e[0m \n"; done
Important extracts:
yet, because for most cases you probably will never make use of this.
The \[\033[01;32m\] part,
as discussed in the previous section, causes the terminal
to print bold green text.
The format here is slightly different from the examples
discussed in the previous section,
because escaped brackets are used to demarcate
the beginning and end of the control sequences.
As we've seen in previous examples, these are not a hard requirement for later bash shell versions.
The \u part is another one of those really useful escape characters. This one acts asa
shorthand for your username or the username of current user.
The \h part this escape character follows the @ sign in this example—the @ sign is just
plain text, nothing special about it. The \h escape character will print your current
hostname in its place when the prompt string is displayed.
The \[\033[00m\] part as discussed in the previous section. This will reset all the
formatting rules so that everything following it is printed as normal text. After
resetting the formatting, we see \[\033[01;34m\]. This will format all the text that
precedes it so that it appears emboldened in blue.
The \w part is a shorthand for the current working directory. Directly after the
working directory is a good old line feed that is printed by using the \n escape
character shorthand. Following this is the\$ escape character, which is a shorthand
that will print a $ sign if anything besides the root user is currently using the shell
and a # when the root user is logged in.
The bash shell offers a few other useful shorthands to make use of in your prompt
string, each causing a different piece of information to be printed directly into your