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
Based on the naming convention, this appears to be a likely containing: pvt : Private or Pivot data. uid : User IDs (unique identifiers). uname : Usernames. Contextual Possibilities pvt_uid_uname.txt
If you have access to the file, you can inspect its contents using the following commands in a terminal to see how the data is structured: head pvt_uid_uname.txt cat -t pvt_uid_uname
