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
PS2defines 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 )\$ '
...
| 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: Would like to use $( pwd ) for current working dir since \w shows ~, but then RET doesn't work on syno fixed '- susp: ', \j for number of suspended processes |
| show (red) return code if not 0 |
| execute bash command (like pwd) |
The location
| device | location |
|---|---|
| Synology | /etc/profile |
| CentOS | /etc/profile.d/localbashrc.sh |
Collored command input
Just end with the color you want to give your command and add:
| Code Block | ||||||
|---|---|---|---|---|---|---|
| ||||||
trap 'echo -ne "\e[0m"' DEBUG |
Extra info
ANSI Escape sequences
See: Good complete link
| Sequence | Description |
|---|---|
| \a | The ASCII bell character (you can also type \007) |
| \d | Date in "Wed Sep 06" format |
| \e | ASCII escape character (you can also type \033) |
| \h | First part of hostname (such as "mybox") |
| \H | Full hostname (such as "mybox.mydomain.com") |
| \j | The number of processes you've suspended in this shell by hitting ^Z |
| \l | The name of the shell's terminal device (such as "ttyp4") |
| \n | Newline |
| \r | Carriage return |
| \s | The name of the shell executable (such as "bash") |
| \t | Time in 24-hour format (such as "23:01:01") |
| \T | Time in 12-hour format (such as "11:01:01") |
| \@ | Time in 12-hour format with am/pm |
| \u | Your username |
| \v | Version of bash (such as 2.04) |
| \V | Bash version, including patchlevel |
| \w | Current working directory (such as "/home/drobbins") |
| \W | The "basename" of the current working directory (such as "drobbins") |
| \! | Current command's position in the history buffer |
| \# | Command number (this will count up at each prompt, as long as you type something) |
| \$ | If you are not root, inserts a "$"; 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. |
...
On Synology probably from version 5 the \[ and \] should not be used, is't automatically subtracted from the visible character counter.