Linux: Bash Shell Prompt Color & Timestamp

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Add Date/Time Stamp to Prompt

Here's how to add date/time stamp to your bash prompt. For example, type this in terminal:

PS1='\u@\H ◆ \D{%Y-%m-%d} ◆ \A ◆ \w\n';
bash color prompt screenshot 2013 05 12
custom bash prompt and ls date format.

Set to Bash Init File

To make it permanent, put the line in:

〔➤ What's the Difference Between .bashrc, .profile, .bash_profile, …?

For basic bash prompt setting and parameters, see man bash, search for PS1. (type 【h】 for help.)

Color Bash Prompt

Example:

PS1='\n◆ \[\e[0;32m\]\u@\H\[\e[m\]◆\[\e[1;34m\] \D{%Y-%m-%d} \A \[\e[m\]◆ \w\n◆ '

See: ANSI escape code

here's the color syntax:

txtblk='\e[0;30m' # Black - Regular
txtred='\e[0;31m' # Red
txtgrn='\e[0;32m' # Green
txtylw='\e[0;33m' # Yellow
txtblu='\e[0;34m' # Blue
txtpur='\e[0;35m' # Purple
txtcyn='\e[0;36m' # Cyan
txtwht='\e[0;37m' # White
bldblk='\e[1;30m' # Black - Bold
bldred='\e[1;31m' # Red
bldgrn='\e[1;32m' # Green
bldylw='\e[1;33m' # Yellow
bldblu='\e[1;34m' # Blue
bldpur='\e[1;35m' # Purple
bldcyn='\e[1;36m' # Cyan
bldwht='\e[1;37m' # White
unkblk='\e[4;30m' # Black - Underline
undred='\e[4;31m' # Red
undgrn='\e[4;32m' # Green
undylw='\e[4;33m' # Yellow
undblu='\e[4;34m' # Blue
undpur='\e[4;35m' # Purple
undcyn='\e[4;36m' # Cyan
undwht='\e[4;37m' # White
bakblk='\e[40m'   # Black - Background
bakred='\e[41m'   # Red
bakgrn='\e[42m'   # Green
bakylw='\e[43m'   # Yellow
bakblu='\e[44m'   # Blue
bakpur='\e[45m'   # Purple
bakcyn='\e[46m'   # Cyan
bakwht='\e[47m'   # White
txtrst='\e[0m'    # Text Reset

Color code from: 〔Color Bash Prompt By Archlinux Wiki. @ wiki.archlinux.org…〕.

ISO Date/Time Format for ls

make ls display datetime stamp in ISO format.

alias l='ls -AlF --color --time-style=long-iso'

Ignore Duplicates in History

How to make bash not save duplicates in history?

# don't save duplicate lines or lines starting with space
HISTCONTROL=ignoreboth

See man bash.

Mac OS X Add Color to 「ls」 Output

How to add color to ls output on Mac OS X?

Mac OS X uses BSD's version of ls. Use the -G option for color output.

alias l='ls -G -al'

https://developer.apple.com/library/mac/documentation/Darwin/Reference/ManPages/man1/ls.1.html

Advanced Bash Context-Dependent Prompt

Bash provided a PROMPT_COMMAND hook, that lets you call a script in {Perl, Python, Ruby, …} to specify your prompt. So, your prompt can show all sort of info and actually do things.

bash color prompt
Bash context-dependent color prompt, showing current git branch.

for how, see: 〔Bash color prompt By Kurt Schwehr. @ schwehr.org…

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