Show only current directory name (not full path) on bash prompt

"Change the \w (lowercase) to \W (uppercase):

PS1='${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\W\[\033[00m\]\$ '
^^
this one waaaaaay over here ------------------------------------------------+

Have a look at the Bash Prompt HOWTO for lots of fun details. example:

user@host:/usr/local/bin$ echo $PS1
${debian_chroot:+($debian_chroot)}\[\033[01;31m\]\u@\h\[\033[00m\]:\[\033[01;36m\]\w\[\033[00m\]\$

user@host:/usr/local/bin$ export PS1='${debian_chroot:+($debian_chroot)}\[\033[01;31m\]\u@\h\[\033[00m\]:\[\033[01;36m\]\W\[\033[00m\]\$ '

user@host:bin$

The PROMPT_COMMAND variable, if set, is a command that gets run before displaying the prompt specified in PS1. In your case, PROMPT_COMMAND runs an echo statement with certain ANSI escape sequences that manipulate the titlebar of an Xterm.

If you suspect your PROMPT_COMMAND is overriding your PS1 prompt, you can unset it and test things out:

$ unset PROMPT_COMMAND

Finally, be sure that you're changing the PS1 definition that actually gets used. Common locations are /etc/bash.bashrc, /etc/profile, ~/.bashrc, ~/.bash_profile, ~/.profile. The system files are generally (but not always) run before the user files."

"My solution is to show the top three and bottom 2 directories when there are more than 5

So my prompt (which has other info too) looks like:

08:38:42 durrantm U2017 /home/durrantm/Dropbox/_/rails/everquote

when my pwd is actually

/home/durrantm/Dropbox/93_2016/work/code/ruby__rails/rails/everquote

My PS1 prompt is setup as follows:

HOST='\[\033[02;36m\]\h'; HOST=' '$HOST
TIME='\[\033[01;31m\]\t \[\033[01;32m\]'
LOCATION=' \[\033[01;34m\]`pwd | sed ""s#\(/[^/]\{1,\}/[^/]\{1,\}/[^/]\{1,\}/\).*\(/[^/]\{1,\}/[^/]\{1,\}\)/\{0,1\}#\1_\2#g""`'
BRANCH=' \[\033[00;33m\]$(git_branch)\[\033[00m\]\n\$ '
PS1=$TIME$USER$HOST$LOCATION$BRANCH

git_branch is a function which shows current git branch, I keep it in my dotfiles, it is:

git_branch () {
git branch 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/\1/'
}"

"Show only current directory name (not full path) on bash prompt

Most of the other solutions did not work for me across all of my OSes that share my dot files: AIX, Windoze, and Linux. The bash ports were old versions that didn't support certain constructs and I didn't want to fork another process (i.e. sed, awk, etc.) which is noticeably expensive under cygwin.

The following is long but performant:

# takes a number argument of the number of last dirs to show
function DIR_LAST {
# read -a didn't seem to work under bash 3
IFS='/' array=($PWD)
len=${#array[@]}
start=$((len - $1))
# leading / if fewer dir args: /usr/flastname not usr/flastname
if (( $start <= 1 )); then
start=1
echo -n /
fi
for (( i = $start; $i < $len; i++ )); do
if (( $i > $start )); then
echo -n /
fi
echo -n ${array[$i]}
done
}
export PS1=""\$(DIR_LAST 2) {$(hostname)} ""

I want it to spit out:

/
/usr
/usr/foo
foo/bin

Notice the lack of a leading slash in the last line which is how I like it. Also, you can spit out the last 3 directories by changing the arg to DIR_LAST.

Also, I tried to do this with a regex and BASH_REMATCH but bash v3 didn't seem to like the parens and I couldn't figure out how to properly escape them. Sigh."

"export PS1=""\[\e[32m\]\u@\h \[\e[37m\]\W \[\e[32m\]$""

Put the above line at the end of ~/.bashrc, and everything should go well.
This will preserve the color and keeps things in beautiful way.
32m --> green
37m --> white"

"root:~/project# -> root:~/project(dev)#

add the following code to the end of your ~/.bashrc

force_color_prompt=yes
color_prompt=yes
parse_git_branch() {
git branch 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/(\1)/'
}
if [ ""$color_prompt"" = yes ]; then
PS1='${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[01;31m\]$(parse_git_branch)\[\033[00m\]\$ '
else
PS1='${debian_chroot:+($debian_chroot)}\u@\h:\w$(parse_git_branch)\$ '
fi
unset color_prompt force_color_prompt"