Sudev Ambadi

I'm a computer enthusiast interested in exploring Free and Open software, operating systems, cloud computing, programming and cricket.

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Useful bashrc functions

I’m going to share some of my bashrc functions which saves me a lot of time.

Killer

This function helps you find a process using a keyword and to kill it, you don’t have to use ps aux along with grep and then kill the process by entering the pid instead use this function give it a keyword and it will help you in killing a process.

killer() { 
echo "I'm going to kill these process";
ps -ef | grep $1 | grep -v grep
echo "Can I ? [y]es [n]o ";
read ans;
if [[ $ans =~ "y" ]] ;
then 
    ps -ef | grep  $1  | grep -v grep | awk '{print $2}' | xargs kill -s TERM 
fi 
}

usage : killer chromium
You will given a list of application which has similar name chromium and proceed with a yes or no.
[ Update This is not so useful function anymore you may use in built pkill command to get the same result. ]

Search and cd combined

This function will help you to search and cd into a folder in a single step.

scd() {
    pathe=$(find ~ -name "${1}" -type d -print -quit | head -n 1)
    cd "${pathe}"
}

Now you may be wondering the reason for using the primitive style of saving result into a variable and then cd’ing into it. I tried using exec with find, but the exec expects a executable binary (something of the sort /bin/bash ) and cd is a shell bultin,which means you will have to leave the parent shell to cd into a folder ( the desired folder ).A one liner for the same will look something of this sort.

find ~ -name $1 -type d -exec bash -c "cd '{}'; exec bash" \;

Also note that you will taken into a new shell and changes that you make in the new shell will not be reflected back in the parent shell, and its a pain to exit each and every shell you create during the process.
You can have a look at my stackoverflow post regarding the doubts that I had with this implementation.
If you have any suggestion to improve the thing please let me know through a comment.

usuage : scd Music
Will take you to Music folder, regardless of your present working directory

Mkdir and cd into it in a single step

Usually we have to create a folder and then cd into it, atleast to me I had to do this very often.

mkcd() {
    mkdir "${1}"
    cd "${1}"
}

A dictionary

Due to my poor vocabulary I always had to look for the meaning of English words from dictionary.com. So to make things easier, I wrote a bash script to fetch meanings from dictionary.com within my terminal.

dict() {

#Creating a temp folder 
dir=~/.dict

#Check for the existence if not create one
[[ -d $dir ]] || mkdir $dir


#download respective file from dictionary dot com 
# -q => do it quietly ie nothing @ screen 
# -O save it as mean
wget -q -O $dir/mean wget http://dictionary.reference.com/browse/$1

#Please DONT hardcode the value, give it to variable and then use it 
file=$dir/mean

#greping out result
m=$(cat $file | grep description | grep -Po 'content=.*.*See more' | grep -Po '\,.*.\.')

#saving the error code 
k=$(echo $?)

#echoing
echo "Meaning of the word "$1" is"$m

#checks if the word was actually available else throws an error
if [[ $k -gt 0 ]]; 
then 
    echo ".........oops, cant find word "$1;
    fi
     
}


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