linux - How to enable the bash history only caching commands that are acutally in path?
2013-12
l1zard
Having a bash history enabled is a security risk, because when you accientally enter your password into the bash the password gets stored in the bash history. To prevent this a good solution would be to configure the bash history not to save commands that were'nt found in $PATH.
So far this is how i setup the history behaviour
# Dont Save duplicated history lines
HISTCONTROL=irgnoredups:erasedups
HISTTIMEFORMAT="%F-%M-%S --> "
HISTIGNORE="su":"su *":"sudo *":"sudo":"his":"his *":"history":"history *":"halt":"reboot":"apt-get *":"apt-cache *":"aptitude *":"dpkg *"
# need a bigger history
# uncomment these lines
#HISTSIZE=1000000
#HISTFILESIZE=1000000
It there a way to setup the history so it would only store commands that are in path?
Ярослав Рахматуллин
You could put all the commands in the variable, I suppose.
HISTIGNORE=${HISTIGNORE}:`find ${PATH//:/ } -printf %f: |sed s/:$//`
obvio171
The way my bash prompt is currently configured, it shows the whole path to the current directory. This is annoying when I'm deep inside a directory tree, as the prompt becomes so long that every command wraps into the next line. How do I make it show only the last part of the path?
This is what I have in my .bashrc:
PS1='${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\$ '
# If this is an xterm set the title to user@host:dir
case "$TERM" in
xterm*|rxvt*)
PROMPT_COMMAND='echo -ne "\033]0;${USER}@${HOSTNAME}: ${PWD/$HOME/~}\007"'
;;
*)
;;
esac
quack quixote
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.