linux file size

C++
ls -l --block-size=Mcd dir ; du -hsx * | sort -rh | head -20 
# example output
# 300MB    some_backup_file.log
# 1.8GB    some_huge_file.warls -l filename   #Displays Size of the specified file
ls -l *          #Displays Size of All the files in the current directory
ls -al *         #Displays Size of All the files including hidden files in the current directory
ls -al dir/      #Displays Size of All the files including hidden files in the 'dir' directory
#Get file size of each folder
du -bsh *du -sh directory_name    #Gives you the summarized(-s) size of the directory in human readable(-h) format
du -bsh *                #Gives you the apparent(-b) summarized(-s) size of all the files and directories in the current directory in human readable(-h) format

Source

Also in C++: