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Add folder to $PATH in linux

if [ -d "$HOME/bin" ] ; then #check folder $HOME/bin existed, then include to $PATH variable
  PATH="$PATH:$HOME/bin"
fi

# Add more folder
if [ -d "$HOME/other/bin" ] ; then 
  PATH="$PATH:$HOME/other/bin"
fi

Find big size file in path

find /<path> -printf '%s %p\n'| sort -nr | head -10

How to Find Biggest Files and Directories in Linux

Run the following command to find out top biggest directories under /home partition.

du -a /home | sort -n -r | head -n 5

If you want to display the biggest directories in the current working directory, run:

du -a | sort -n -r | head -n 5

Some of you would like to display the above result in human readable format. i.e you might want to display the largest files in KB, MB, or GB.

du -hs * | sort -rh | head -5

To display the largest folders/files including the sub-directories, run:

du -Sh | sort -rh | head -5