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mbjr
Guru
Joined: 17 Jan 2004
Posts: 531
Location: Budapest/Hungary
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 Posted: Wed Oct 06, 2004 6:09 pm Post subject: md5 question |
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Hi 
I'm just qurious if there's any way to create an MD5 of a file which should contain the md5 code that is created So basicly I have a file:
myfiletomd5.dat
cat myfiletomd5.dat says:
MD5 F83DAEB045B592D2D67F288EA3C0E268 myfiletomd5.dat
and how do I make this content replaced by creating an md5 of the file?  Is it possible? Is there any way to calculate such thing?
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pjp
Administrator
Joined: 16 Apr 2002
Posts: 20583
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| Posted: Wed Oct 06, 2004 6:16 pm Post subject: |
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Moved from Other Things Gentoo.
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Quis separabit? Quo animo? |
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flindt
Tux's lil' helper
Joined: 10 Dec 2003
Posts: 112
Location: Denmark
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| Posted: Wed Oct 06, 2004 7:10 pm Post subject: |
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Outputs from commands can be piped to a file by using '>' or '>>', the first will overwrite the file and the latter will append to it.
| Code: | md5sum somefile > somefile.md5
cat somefile.md5
3e73db51c0c311b4de07a652fb9be12c somefile |
or if you need the MD5 tag in there
| Code: |
echo MD5 > somefile.md5
md5sum somefile >> somefile.md5
cat somefile.md5
MD5 3e73db51c0c311b4de07a652fb9be12c somefile |
the other way works too! '<' will pipe from a file to the command
| Code: | | md5sum --check < somefile.md5 |
however only if the MD5 tag is not in the file... |
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