If you want to dig into UNIX programming Randux, learn C and buy a copy of
W. Richard Stevens best works ;-)
but don't forget Bourne Shell, SED, AWK, and Perl along the way.
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My
Journal
Thou shalt check the array bounds of all strings (indeed, all arrays), for surely where thou typest ``foo'' someone someday shall type ``supercalifragilisticexpialidocious''.