5.4. Using What

The what shows what versions of object modules were used to construct a file. For example:

# what /bin/ls
/bin/ls:
         Copyright (c) 1989, 1993, 1994
        termcap.c       8.1 (Berkeley) 6/4/93
        strftime.c      7.38
        strftime.c      5.4 (Berkeley) 3/14/89
        getbsize.c      8.1 (Berkeley) 6/4/93
        localtime.c     7.57
        asctime.c       7.7
        rec_seq.c       8.3 (Berkeley) 7/14/94