8 Useful and Interesting Bash Prompts

1. Show Happy face upon successful execution  在成功执行的命令上面显示笑脸

This prompt is probably the most amusing one on the list, but remains useful. The idea is that as long as your commands execute successfully, your prompt shows a happy face. Any time a command fails, it shows a sad face instead.

Example:

Code:

PS1="\`if [ \$? = 0 ]; then echo \[\e[33m\]^_^\[\e[0m\]; else echo \[\e[31m\]O_O\[\e[0m\]; fi\`[\u@\h:\w]\\$ "

2.Change color on bad command 更改失败命令的颜色

Here’s one of my favorites. This prompt has it all. Like above, the prompt changes color if your last command failed to run successfully, but it also shortens long paths and contains the number of each command for easy retrieval.

Example:

Code:

PROMPT_COMMAND='PS1="\[\033[0;33m\][\!]\`if [[ \$? = "0" ]]; then echo "\\[\\033[32m\\]"; else echo "\\[\\033[31m\\]"; fi\`[\u.\h: \`if [[ `pwd|wc -c|tr -d " "` > 18 ]]; then echo "\\W"; else echo "\\w"; fi\`]\$\[\033[0m\] "; echo -ne "\033]0;`hostname -s`:`pwd`\007"'

3. Multi lines prompt多行提示

If you’re the type who wants to pack your prompt full of information, then here’s the one for you. This one is a multi-line prompt containing date/time, full path, user and host, active terminal, even file count and space usage.
Example:

Code:

PS1="\n\[\033[35m\]\$(/bin/date)\n\[\033[32m\]\w\n\[\033[1;31m\]\u@\h: \[\033[1;34m\]\$(/usr/bin/tty | /bin/sed -e 's:/dev/::'): \[\033[1;36m\]\$(/bin/ls -1 | /usr/bin/wc -l | /bin/sed 's: ::g') files \[\033[1;33m\]\$(/bin/ls -lah | /bin/grep -m 1 total | /bin/sed 's/total //')b\[\033[0m\] -> \[\033[0m\]"

4. Color manage your prompt 多颜色提示符

There’s nothing particularly fancy about this prompt, other than the good use of color to separate the different pieces of information. As you can see, it provides time, username, hostname, and current directory. Fairly minimal but useful.

Example:

Code:

PS1="\[\033[35m\]\t\[\033[m\]-\[\033[36m\]\u\[\033[m\]@\[\033[32m\]\h:\[\033[33;1m\]\w\[\033[m\]\$ "

5. Show full path 显示完整路径

This one’s a nice, clean, minimal 2-line prompt (plus a blank line at the top). You’ve got your full path at the first line and pretty much just the username at the bottom. If you want to remove the blank line at the start of every prompt, just take out the first “\n”.

Example:

Code:

PS1="[\[\033[32m\]\w]\[\033[0m\]\n\[\033[1;36m\]\u\[\033[1;33m\]-> \[\033[0m\]"

6. Show background job count 显示后台运行的任务数

Another nifty 2-liner, but this one’s got some info we haven’t used before. The first line is the normal user@host, with full path. On the second line we’ve got history number and a count of the jobs running in the background.

Example:

Code:

PS1='\[\e[1;32m\]\u@\H:\[\e[m\] \[\e[1;37m\]\w\[\e[m\]\n\[\e[1;33m\]hist:\! \[\e[0;33m\] \[\e[1;31m\]jobs:\j \$\[\e[m\] '

7. Display directory information 显示文件夹信息

A very elegant and nice looking prompt design. With this one we’ve got user/host, number of jobs, and date/time on the top line. Below that is current directory along with number of files in that directory and their disk usage.

Example:

Code:

PS1="\n\[\e[30;1m\]\[\016\]l\[\017\](\[\e[34;1m\]\u@\h\[\e[30;1m\])-(\[\e[34;1m\]\j\[\e[30;1m\])-(\[\e[34;1m\]\@ \d\[\e[30;1m\])->\[\e[30;1m\]\n\[\016\]m\[\017\]-(\[\[\e[32;1m\]\w\[\e[30;1m\])-(\[\e[32;1m\]\$(/bin/ls -1 | /usr/bin/wc -l | /bin/sed 's: ::g') files, \$(/bin/ls -lah | /bin/grep -m 1 total | /bin/sed 's/total //')b\[\e[30;1m\])--> \[\e[0m\]"

8. My Prompt

And finally, the prompt I personally like to use. It’s a modification of #7, changed to take up less space and include only the information I most want in my prompt. I like the two-line style as it lets me see the full path without reducing the space for my actual commands.

Example:

Code:

PS1="\n\[\e[32;1m\](\[\e[37;1m\]\u\[\e[32;1m\])-(\[\e[37;1m\]jobs:\j\[\e[32;1m\])-(\[\e[37;1m\]\w\[\e[32;1m\])\n(\[\[\e[37;1m\]! \!\[\e[32;1m\])-> \[\e[0m\]"