Omitting the first line from any Linux command output

The tail program can do this:

ls -lart | tail -n +2

The -n +2 means “start passing through on the second line of output”.

Pipe it to awk:

awk '{if(NR>1)print}'

or sed

sed -n '1!p'

ls -lart | tail -n +2 #argument means starting with line 2