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unix disk i/o

 
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is there a command to view disk i/o for each process that is running on a unix box?

Thanks!
 
Chris Montgomery
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found iostat, but it says "command not found" (using putty).
 
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Different tools are available for different UNIX O/S's. What flavor of UNIX are we talking about?
 
Chris Montgomery
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he he...
do you have a command to find that out ?
 
Ernest Friedman-Hill
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Yes: uname . "uname -a" will give lots of details.
 
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it's Linux 2.4.13 i686
 
Ernest Friedman-Hill
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iostat is available, but might not be installed. Try /usr/sbin/iostat, and if it's not there, ask the sysadmin about getting it. iostat gives you per-device info -- because of the way UNIX filesystems work, in general, per-process I/O statistics aren't very meaningful.

The lsof program (also maybe in /usr/sbin, or ask your sysadmin) can tell you all the files a process has open, and some info about each file. This is often very handy.
 
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