mybashtweaks

bash tweaking is an art they say, yes it is.

---

We all know that Linux is open-source right, one day I was exploring random directories, suddenly I opened some file which was all like They are speaking the language of the gods meme, it was ~/.bashrc.
So, I thought can I edit it ? , and here I am.

Since we all work everyday in Linux, some aliases/snippets could be useful.

An alias means as the name suggests, we call something instead of something else.
A snippet is a piece of code which behaves in the same way we define it.

Contents :

• general purpose aliases
• git cli aliases
• programming snippets
• Competitve Programming snippets

Some of my useful aliases and snippets :

general_purpose

#clear screen in terminal
alias c='clear'

#change directory aliases
alias home='cd ~'
alias ..='cd ..'
alias ...='cd ../..'
alias ....='cd ../../..'
alias .....='cd ../../../..'

#go instead of cd
alias go="cd"

# find a file in a directory
alias f="find . | grep "

#system update
alias up="sudo apt-get update"

#shoutdown aliases
alias off="sudo shutdown now"
alias ss="sudo shutdown -r now"
alias sf="sudo shutdown -r -n now"

#update ubuntu
alias up="sudo apt-get update"

# Create a dir and go to the directory
mkdirgo ()
{
  mkdir -p $1
  cd $1
}

# Move a dir and go to the directory
mvgo ()
{
  if [ -d "$2" ];then
   mv $1 $2 && cd $2
  else
   mv $1 $2
  fi
}

# Copy file with a progress bar
#this should work ig
copy ()
{
 set -e
 strace -q -ewrite cp -- "${1}" "${2}" 2>&1 \
 | awk {
 count += $NF
 if (count % 10 == 0) {
  percent = count / total_size * 100
  printf "%3d%% [", percent
  for (i=0;i<=percent;i++)
    printf "="
    printf ">"
    for (i=percent;i<100;i++)
      printf " "
      printf "]\r"
    }
  }
 END { print "" } total_size=$(stat -c '%s' "${1}") count=0
}

# IP address lookup
alias whatismyip="whatsmyip"
function whatsmyip ()
{
	# Dumps a list of all IP addresses for every device
	# /sbin/ifconfig |grep -B1 "inet addr" |awk '{ if ( $1 == "inet" ) { print $2 } else if ( $2 == "Link" ) { printf "%s:" ,$1 } }' |awk -F: '{ print $1 ": " $3 }';

	# Internal IP Lookup
	echo -n "Internal IP: " ; /sbin/ifconfig eth0 | grep "inet addr" | awk -F: '{print $2}' | awk '{print $1}'

	# External IP Lookup
	echo -n "External IP: " ; wget http://smart-ip.net/myip -O - -q
}

git_cli_aliases

#git commands
alias s="git status"
alias p="git push"
alias pu="git pull"
alias add="git add ."
alias m="git merge"
alias commit="git commit"
alias cl="git clone"

programming_snippets

#run cpp-file
cpp-run() {
    echo "Compiling file..."
    g++ -o "$1" "$1.cpp"
    echo "Compiled! "
    ./"$1"
}

#run c-file
c-run() {
    echo "Compiling file..."
    gcc -o "$1" "$1.c"
    echo "Compiled!"
    ./"$1"
}

#run py-file
py-run() {
    echo "Compiling file ..."
    python ./"$1.py"
}

the above programming snippets only run when the program takes no input from the user

CP_snippets

#compile cpp-file
cpp() {
    g++ -o "$1" "$1.cpp"
    echo "Compiled! "
}
#execute cpp-file
alias o="./a.out"

This is an example what you should enter in your terminal :

cf 642 6

The above command generates 6 files namely : a.cpp,b.cpp,c.cpp,d.cpp,e.cpp,f.cpp for you in the ~/Desktop/Codeforces/642 path using the below code

cf() {
# you can change the path
mkdir ~/Desktop/Codeforces/$1
cd ~/Desktop/Codeforces/$1
loop=0 
var=( {a..z} )
while [ $loop -lt $2 ] 
do
	# test.cpp is my template file
	cp ~/Desktop/test.cpp ~/Desktop/Codeforces/$1 
	mv test.cpp ${var[a]}.cpp
	loop=`expr $loop + 1` 
done 
}

#similarly for codechef
cc() {
#you can change the path
mkdir ~/Desktop/Codechef/$1
cd ~/Desktop/Codechef/$1
loop=0 
var=( {a..z} )
while [ $loop -lt $2 ] 
do
	# test.cpp is my template file
	cp ~/Desktop/test.cpp ~/Desktop/Codechef/$1 
	mv test.cpp ${var[a]}.cpp
	loop=`expr $loop + 1` 
done 
}