Author: fernape (ports committer) Date: Fri Jun 19 06:23:55 2020 New Revision: 362365 URL: https://svnweb.freebsd.org/changeset/base/362365
Log: md5(1): Add EXAMPLES section Add EXAMLES covering -c, -s and -r Approved by: bcr@, 0mp@ Differential Revision: https://reviews.freebsd.org/D25278 Modified: head/sbin/md5/md5.1 Modified: head/sbin/md5/md5.1 ============================================================================== --- head/sbin/md5/md5.1 Fri Jun 19 05:54:15 2020 (r362364) +++ head/sbin/md5/md5.1 Fri Jun 19 06:23:55 2020 (r362365) @@ -1,5 +1,5 @@ .\" $FreeBSD$ -.Dd June 15, 2020 +.Dd June 19, 2020 .Dt MD5 1 .Os .Sh NAME @@ -95,6 +95,48 @@ utilities exit 0 on success, and 2 if at least one file does not have the same hash as the .Fl c option. +.Sh EXAMPLES +Calculate the MD5 checksum of the string +.Dq Hello . +.Bd -literal -offset indent +$ md5 -s Hello +MD5 ("Hello") = 8b1a9953c4611296a827abf8c47804d7 +.Ed +.Pp +Same as above, but note the absence of the newline character in the input +string: +.Bd -literal -offset indent +$ echo -n Hello | md5 +8b1a9953c4611296a827abf8c47804d7 +.Ed +.Pp +Calculate the checksum of multiple files reversing the output: +.Bd -literal -offset indent +$ md5 -r /boot/loader.conf /etc/rc.conf +ada5f60f23af88ff95b8091d6d67bef6 /boot/loader.conf +d80bf36c332dc0fdc479366ec3fa44cd /etc/rc.conf +.Ed +.Pp +Write the digest for +.Pa /boot/loader.conf +in a file named +.Pa digest . +Then calculate the checksum again and validate it against the checksum string +extracted from the +.Pa digest +file: +.Bd -literal -offset indent +$ md5 /boot/loader.conf > digest && md5 -c $(cut -f2 -d= digest) /boot/loader.conf +MD5 (/boot/loader.conf) = ada5f60f23af88ff95b8091d6d67bef6 +.Ed +.Pp +Same as above but comparing the digest against an invalid string +.Pq Dq randomstring , +which results in a failure. +.Bd -literal -offset indent +$ md5 -c randomstring /boot/loader.conf +MD5 (/boot/loader.conf) = ada5f60f23af88ff95b8091d6d67bef6 [ Failed ] +.Ed .Sh SEE ALSO .Xr cksum 1 , .Xr md5 3 , _______________________________________________ svn-src-all@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
