Reset $PATH Variable to Default Kali setting

Question

Running Kali Linux Rolling Distro.

Attempted to install Cuda Toolkit to the /opt/ directory using the following syntax:

chmod +x cudatoolkit_4.1.28_linux_64_ubuntu11.04.run
./cudatoolkit_4.1.28_linux_64_ubuntu11.04.runConfigure  

echo PATH=$PATH:/opt/cuda/bin >> ~/.bashrc
echo LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/opt/cuda/lib >> ~/.bashrc
echo export PATH >> ~/.bashrc
echo export LD_LIBRARY_PATH >> ~/.bashrc

Now every time I open my terminal I see this at the very top:

bash: /opt/cuda/bin: No such file or directory

bash: /opt/cuda/bin: No such file or directory

bash: /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin: No such file or directory

bash: /usr/local/sbin: Is a directory

root@kali:~# cat ~/.bashrc
# ~/.bashrc: executed by bash(1) for non-login shells.
# see /usr/share/doc/bash/examples/startup-files (in the package bash-doc)
# for examples
# If not running interactively, don't do anything
case $- in
    *i*) ;;
      *) return;;
esac
# don't put duplicate lines or lines starting with space in the history.
# See bash(1) for more options
HISTCONTROL=ignoreboth
# append to the history file, don't overwrite it
shopt -s histappend
# for setting history length see HISTSIZE and HISTFILESIZE in bash(1)
HISTSIZE=1000
HISTFILESIZE=2000
# check the window size after each command and, if necessary,
# update the values of LINES and COLUMNS.
shopt -s checkwinsize
# If set, the pattern "**" used in a pathname expansion context will
# match all files and zero or more directories and subdirectories.
#shopt -s globstar
# make less more friendly for non-text input files, see lesspipe(1)
#[ -x /usr/bin/lesspipe ] && eval "$(SHELL=/bin/sh lesspipe)"
# set variable identifying the chroot you work in (used in the prompt below)
if [ -z "${debian_chroot:-}" ] && [ -r /etc/debian_chroot ]; then
    debian_chroot=$(cat /etc/debian_chroot)
fi
# set a fancy prompt (non-color, unless we know we "want" color)
case "$TERM" in
    xterm-color) color_prompt=yes;;
esac
# uncomment for a colored prompt, if the terminal has the capability; turned
# off by default to not distract the user: the focus in a terminal window
# should be on the output of commands, not on the prompt
force_color_prompt=yes
if [ -n "$force_color_prompt" ]; then
    if [ -x /usr/bin/tput ] && tput setaf 1 >&/dev/null; then
    # We have color support; assume it's compliant with Ecma-48
    # (ISO/IEC-6429). (Lack of such support is extremely rare, and such
    # a case would tend to support setf rather than setaf.)
    color_prompt=yes
    else
    color_prompt=
    fi
fi
if [ "$color_prompt" = yes ]; then
    PS1='${debian_chroot:+($debian_chroot)}\[\033[01;31m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\$ '
else
    PS1='${debian_chroot:+($debian_chroot)}\u@\h:\w\$ '
fi
unset color_prompt force_color_prompt
# If this is an xterm set the title to user@host:dir
case "$TERM" in
xterm*|rxvt*)
    PS1="\[\e]0;${debian_chroot:+($debian_chroot)}\u@\h: \w\a\]$PS1"
    ;;
*)
    ;;
esac
# enable color support of ls and also add handy aliases
if [ -x /usr/bin/dircolors ]; then
    test -r ~/.dircolors && eval "$(dircolors -b ~/.dircolors)" || eval "$(dircolors -b)"
    alias ls='ls --color=auto'
    #alias dir='dir --color=auto'
    #alias vdir='vdir --color=auto'
    #alias grep='grep --color=auto'
    #alias fgrep='fgrep --color=auto'
    #alias egrep='egrep --color=auto'
fi
# some more ls aliases
#alias ll='ls -l'
#alias la='ls -A'
#alias l='ls -CF'
# Alias definitions.
# You may want to put all your additions into a separate file like
# ~/.bash_aliases, instead of adding them here directly.
# See /usr/share/doc/bash-doc/examples in the bash-doc package.
if [ -f ~/.bash_aliases ]; then
    . ~/.bash_aliases
fi
# enable programmable completion features (you don't need to enable
# this, if it's already enabled in /etc/bash.bashrc and /etc/profile
# sources /etc/bash.bashrc).
if ! shopt -oq posix; then
  if [ -f /usr/share/bash-completion/bash_completion ]; then
    . /usr/share/bash-completion/bash_completion
  elif [ -f /etc/bash_completion ]; then
    . /etc/bash_completion
  fi
fi    
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin: /opt/cuda/bin
LD_LIBRARY_PATH=:/opt/cuda/lib
export PATH
export LD_LIBRARY_PATH
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin: /opt/cuda/bin
/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin: /usr/local/sbin

I need to return to the default Kali Linux setting, in order to remove this 'bash message' I see every time I fire up the terminal.

Solution

the fact that

echo LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/opt/cuda/lib >> ~/.bashrc

gets expanded to

LD_LIBRARY_PATH=:/opt/cuda/lib

indicated that LD_LIBRARY_PATH is either unset or NULL.

try this instead

echo 'PATH=$PATH:/opt/cuda/bin' >> ~/.bashrc
if [[ -z $LD_LIBRARY_PATH ]]
then
    echo 'LD_LIBRARY_PATH=/opt/cuda/lib' >> ~/.bashrc
else                                                                
    echo 'LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/opt/cuda/lib' >> ~/.bashrc
fi
echo 'export PATH' >> ~/.bashrc
echo 'export LD_LIBRARY_PATH' >> ~/.bashrc

Comments

[Julie Pelletier]

Actually show us what is in ~/.bashrc by running cat ~/.bashrc.

[Joey Rodriguez]

Post has been edited

[Julie Pelletier]

Those are all simple syntax errors in that awful script. Open it up in your favorite text editor and fix the lines near the end starting with the PATH. You'll have to actually combine those different path lines in one without any space.

[G-Man Says 'Reinstate Monica']

What Julie is saying is: change : / (with a space) to :/ (no space).

[VocalFan]

Don't you want the old $LD_LIBRARY_PATH included in the new one?

[the_velour_fog]

@JigglyNaga good point, I wondered if anyone would pick that up. answer updated.