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| <tr><td width=20><td><b>SUM(1)</b><td align=right><b>SUM(1)</b> |
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| <p><font size=+1><b>NAME </b></font><br> |
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| sum, md5sum, sha1sum – sum and count blocks in a file<br> |
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| <p><font size=+1><b>SYNOPSIS </b></font><br> |
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| <tt><font size=+1>sum</font></tt> [ <tt><font size=+1>−5r</font></tt> ] [ <i>file ...</i> ] |
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| <tt><font size=+1>md5sum</font></tt> [ <i>file ...</i> ] |
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| <tt><font size=+1>sha1sum</font></tt> [ <i>file ...</i> ]<br> |
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| <p><font size=+1><b>DESCRIPTION </b></font><br> |
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| By default, <i>sum</i> calculates and prints a 32-bit hexadecimal checksum, |
| a byte count, and the name of each <i>file</i>. The checksum is also |
| a function of the input length. If no files are given, the standard |
| input is summed. Other summing algorithms are available. The options |
| are<br> |
| <tt><font size=+1>−r</font></tt> Sum with the algorithm of System V’s <tt><font size=+1>sum −r</font></tt> and print the length |
| (in 1K blocks) of the input.<br> |
| <tt><font size=+1>−5</font></tt> Sum with System V’s default algorithm and print the length (in |
| 512-byte blocks) of the input. |
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| <i>Sum</i> is typically used to look for bad spots, to validate a file |
| communicated over some transmission line or as a quick way to |
| determine if two files on different machines might be the same. |
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| <tt><font size=+1>Md5sum</font></tt> computes the 32 hex digit RSA Data Security, Inc. MD5 Message-Digest |
| Algorithm described in RFC1321. If no <i>files</i> are given, the standard |
| input is summed. |
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| <tt><font size=+1>Sha1sum</font></tt> computes the 40 hex digit National Institute of Standards |
| and Technology SHA1 secure hash algorithm described in FIPS PUB |
| 180-1. If no <i>files</i> are given, the standard input is summed.<br> |
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| <p><font size=+1><b>SOURCE </b></font><br> |
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| <tt><font size=+1>/usr/local/plan9/src/cmd/sum.c<br> |
| /usr/local/plan9/src/cmd/md5sum.c<br> |
| /usr/local/plan9/src/cmd/sha1sum.c<br> |
| </font></tt> |
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| <p><font size=+1><b>SEE ALSO </b></font><br> |
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| <a href="../man1/cmp.html"><i>cmp</i>(1)</a>, <a href="../man1/wc.html"><i>wc</i>(1)</a><br> |
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