linux shell file size

Question

I want to get size of file into variable ? How to do that?

ls -l | grep testing.txt | cut -f6 -d\' \'

gave the size but how to store it in

Answer 1

    a=\`stat -c '%s' testing.txt\`;
    echo $a

Answer 2

size=`ls -l | grep testing.txt | cut -f6 -d' '`

Answer 3

you can do it this way with ls (check man page for meaning of -s)

$ var=$(ls -s1 testing.txt|awk '{print $1}')

Or you can use stat with -c '%s'

Or you can use find (GNU)

$ var=$(find testing.txt -printf "%s")

Answer 4

size() {
  file="$1"
  if [ -b "$file" ]; then
    /sbin/blockdev --getsize64 "$file"
  else
    wc -c < "$file"  # Handles pseudo files like /proc/cpuinfo
    # stat --format %s "$file"
    # find "$file" -printf '%s\n'
    # du -b "$file" | cut -f1
  fi
}

fs=$(size testing.txt)

Answer 5

You can get the file size in bytes with the command wc, which is fairly common in Linux systems since it's part of GNU coreutils

wc -c < file

In a bash script you can read it into a variable like this:

FILESIZE=$(wc -c < file)

From man wc:

-c, --bytes
       print the byte counts

Answer 6

filesize=$(stat -c '%s' testing.txt)