Pvt_uid_uname.txt [TOP]

cat -t pvt_uid_uname.txt (this will show if it uses tabs or spaces). To count the entries: wc -l pvt_uid_uname.txt

Depending on where you found this file, here is what it likely represents: pvt_uid_uname.txt

: It could be a tab-separated or comma-separated list exported from a user management table. cat -t pvt_uid_uname