What is the purpose of the : (colon) GNU Bash builtin?

What is the purpose of the : (colon) GNU Bash builtin?

bash shell built-in

shell

What does "< <(command args)" mean in the shell?

bash shell built-in

shell

No man page for the cd command

linux shell command built-in ubuntu-15.10

shell

Override a builtin command with an alias

bash function shell alias built-in

shell

Respect last line if it's not terminated with a new line char (\n) when using read

bash shell built-in

shell

Why does shell builtin colon command ":" after variable assignment on same line cause empty string value to be assigned?

bash shell sh variable-assignment built-in

shell

Meaning of ulimit Hard (-H) and Soft (-S)

bash shell coredump built-in ulimit

shell

bash built in function bash source code

linux bash shell built-in

shell

Bash history between two points in time

bash shell history built-in

shell

Trailing newlines and the bash 'read' builtin

bash shell newline built-in

shell

Can't successfully call any external shell script in pipe with set -eo pipefail

linux bash shell pipe built-in

shell

Tools built into the shell

bash shell built-in pwd

shell

"builtin: not found" when I source a script via PHP passthru()

php linux shell rvm built-in

shell