Bash command to sum a column of numbers [duplicate]

Answer 1

Use a for loop to iterate over your file …

sum=0; for x in `cat <your-file>`; do let sum+=x; done; echo $sum

Answer 2

[root@pentest3r ~]# (find / -xdev -size +1024M) | (while read a ; do aa=$(du -sh $a | cut -d "." -f1 ); o=$(( $o+$aa )); done; echo "$o";)

Answer 3

while read -r num; do ((sum += num)); done < inputfile; echo $sum

Answer 4

Using existing file:

paste -sd+ infile | bc

Using stdin:

<cmd> | paste -sd+ | bc

Edit: With some paste implementations you need to be more explicit when reading from stdin:

<cmd> | paste -sd+ - | bc