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Old 01-25-2011, 07:36 PM   #1
ahtoot
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Registered: Jun 2005
Posts: 22

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less displays binary but cat displays ascii?


I'm running the following command
Code:
./startWeblogic.sh &> log
After some time..
Code:
file log
log: data
The following commands display binary
Code:
less log
vim log
cat log | less
but
Code:
cat log
displays the ascii text properly.

Why? Is it possible to use less to view the log?

Thanks.

Last edited by ahtoot; 01-25-2011 at 07:40 PM.
 
Old 01-25-2011, 08:14 PM   #2
binary_pearl
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Registered: Jul 2007
Location: Chicago Illinois
Distribution: SLES 10 SP2/SP3, SLES 11 SP1, OpenSUSE, Sabayon, Gentoo, Fedora 14, RHEL 3/4/5/6
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Try doing this instead:

Quote:
./startWeblogic.sh > log &
I could be wrong, but I'm thinking the above command will start the script and output to log, and then put the entire process in the background.

If the script really is producing binary data, perhaps there is a special tool to read the log file. The other possibility is to use the `strings` command on the log file. That should parse out the ascii entries in the "log" file.

--Shaun

Last edited by binary_pearl; 01-25-2011 at 08:16 PM. Reason: new idea just came to me
 
Old 01-25-2011, 08:24 PM   #3
ahtoot
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Registered: Jun 2005
Posts: 22

Original Poster
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Figured it out, I had pages of binary data followed by ascii text.

cat displayed the ascii tail of the file, less started with the binary head.
 
1 members found this post helpful.
Old 01-25-2011, 08:38 PM   #4
sys64738
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Registered: May 2008
Location: NRW/Germany
Posts: 105

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Well the output of the command file says it.
Quote:
file log
log: data
I think the file contains escape sequences which hinders "less" to display it properly.
You could use mc (midnight commander) to view the file in hex mode.
Or use:
Code:
mcview log
for the command line (gives you a ncurses interface).
 
  


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