-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Michael Yep wrote: > That did not seem to work. Is this correct ? > > [root@localhost ~]# lastb -ai |fgrep "Jul 18" |awk '{print $10 > }'|sort|uniq|xargs grep -i {} /root/BLACKLIST > grep: 222.234.108.77: No such file or directory > grep: 83.15.73.34: No such file or directory The -i is misplaced in this example. You'd want to use it after xargs instead of after grep for it to do what you want. (Though you might also want to use -i with grep to have it search case-insensitively.) The xargs manpage states that the -i option is deprecated and you should use -I{} instead. The {} is a string, you can use what you wish as the string to the -I option, so a more readable example might be: ... | xargs -Iip grep ip blacklist - -- Todd OpenPGP -> KeyID: 0xD654075A | URL: www.pobox.com/~tmz/pgp ====================================================================== If everything seems to be going well, you have obviously overlooked something. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.4 (GNU/Linux) Comment: When crypto is outlawed bayl bhgynjf jvyy unir cevinpl. iG0EARECAC0FAkS9PuMmGGh0dHA6Ly93d3cucG9ib3guY29tL350bXovcGdwL3Rt ei5hc2MACgkQuv+09NZUB1pXwwCg7gB2AVZLymRQweEvtKss/spRn0wAniyHmWvj oCdWg+qbMMe5bSdg+8ut =hbem -----END PGP SIGNATURE-----