Info

PROMPT_COMMAND and is execed right in front of the PS1
PS1 specifies the format of your regular prompt that appears to the left of every new command you type
PS2 defines the continuation prompt: It appears when you enter a line ending with a backslash to continue input on the next line.

A real good page about all kinds of options.

THE Prompt

export PS1='\[\e[1;33m\]\u@\h\[\e[0m\]:\[\e[1;34m\]\W\[\e[0m\] \e]2;\u@\H:\w - susp:\j\a$( RET=$?; if [ $RET != 0 ] ; then echo "\[\e[1;31m\]rc:$RET\[\e[00m\] "; fi )\$ '

for synology without the \[ and \]

export PS1='\e[1;33m\u@\h\e[0m:\e[1;34m\W\e[0m \e]2;\u@\H:\w - susp:\j\a$( RET=$?; if [ $RET != 0 ] ; then echo "\e[1;31mrc:$RET\e[00m "; fi )\$ '

(to make it permanent put this in ~/.bash_profile or ~/.bashrc)

Code	Explained
'\[\e[1;33m\]'	Bold Yellow text (0;33 would be dark yellow)
'\u@\h'	\u for username, fixed '@', \h for first part of hostname
'\[\e[0m\]'	reset foreground, background, and boldness settings to their default values
':'	fixed ':'
'\[\e[01;34m\]'	Bold Blue text
\W	The "basename of the current netowkr directory (drobbins from /home/frobbins)

'\[\e[0m\]'
' \$ '	If you are not root, inserts a "$"; if you are root, you get a "#"
'\e]2;\u@\H:$( pwd )- susp: \j\a'	text within \e2; and \a will be put into the titlebar of the X terminal: \u for username, fixed '@', \H for full hostname, fixed':', Would like to use $( pwd ) for current working dir since \w shows ~, but then RET doesn't work on syno fixed '- susp: ', \j for number of suspended processes

`'$( RET=$?; if [ $RET != 0 ] ; then echo "\[\e[1;31m\]rc:$RET\[\e[00m\] "; fi )\$ '`	show (red) return code if not 0
`$( pwd )`	execute bash command (like pwd)

The location

device	location
Synology	/etc/profile
CentOS	/etc/profile.d/localbashrc.sh

Collored command input

Just end with the color you want to give your command and add:

~/.bashrc

 trap 'echo -ne "\e[0m"' DEBUG

Extra info

Color chart

ANSI Escape sequences

See: Good complete link

Sequence	Description
\a	The ASCII bell character (you can also type \007)
\d	Date in "Wed Sep 06" format
\e	ASCII escape character (you can also type \033)
\h	First part of hostname (such as "mybox")
\H	Full hostname (such as "mybox.mydomain.com")
\j	The number of processes you've suspended in this shell by hitting ^Z
\l	The name of the shell's terminal device (such as "ttyp4")
\n	Newline
\r	Carriage return
\s	The name of the shell executable (such as "bash")
\t	Time in 24-hour format (such as "23:01:01")
\T	Time in 12-hour format (such as "11:01:01")
\@	Time in 12-hour format with am/pm
\u	Your username
\v	Version of bash (such as 2.04)
\V	Bash version, including patchlevel
\w	Current working directory (such as "/home/drobbins")
\W	The "basename" of the current working directory (such as "drobbins")
\!	Current command's position in the history buffer
\#	Command number (this will count up at each prompt, as long as you type something)
\$	If you are not root, inserts a "$"; if you are root, you get a "#"
\xxx	Inserts an ASCII character based on three-digit number xxx (replace unused digits with zeros, such as "\007")
\\	A backslash
\[	This sequence should appear before a sequence of characters that don't move the cursor (like color escape sequences). This allows bash to calculate word wrapping correctly.
\]	This sequence should appear after a sequence of non-printing characters.

to my prompt that would be red and bold if its greater than zero and regular and white if it was zero. If this "if" behavior is not possible, then I could just have it always white and regular text. Could anyone help me out with this? Below is the output of my PS1 variable.

PS1='...:\[$(((\j > 0))&&{ tput setaf 1;tput bold;})\]\j\[$(tput sgr0)\]...'

the ✓ unicode symbol for a zero status and the ✗ unicode symbol for a nonzero status:

    FancyX='\342\234\227'
    Checkmark='\342\234\223'
but then you need to use unicode

On Synology probably from version 5 the \[ and \] should not be used, is't automatically subtracted from the visible character counter.

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