Unix challange

[Spydermag68]

Ok a friend at work has hidden a file ls -a shows it, but I have no clue what command he used to hide the file.

Thanks

 

[futuristicmonkey]

Is there a period that precedes the filename, with no space between it and the normal filename ?

If there is, just remove that period.

 

[Spydermag68]

so basicly the name of the file would be .trace and mv .trace trace would unhide it?

 

[n0cmonkey]

Yes. The leading . hides a file.