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Shell Programming and Scripting
Compare files across 2 UNIX boxes
Post 302090747 by flattyre on Wednesday 27th of September 2006 09:30:30 AM
09-27-2006
Compare files across 2 UNIX boxes
Is it possible to compare two files which reside on different UNIX boxes?
(I'm using HP POSIX/Korn)
Consider the scenario of a pre-production environment (box 1) and a production environment (box 2) I would like to check if some files on both boxes match or not.
It's quite straightforward on one box:
#----------------------------------------------------
# Function to compares files and display differences
#
# $1 = file1, $2 = file2
#
# cmp with option -s gives the following return codes:
# 0 - identical
# 1 - different
# 2 - inaccessable/other
#----------------------------------------------------
function fn030_compare_file {
cmp -s $1 $2
if [[ $? -gt 0 ]]
then
echo "*** Difference in files! -----> $1 <---> $2"
else
echo "*** OK, Files identical -----> $1 <---> $2"
fi
return
}
The only alternative I can think of is to copy the files to one box, then compare from there.
NOTE: I found an excellent shell script which recursively compares the contents of two directories on one box (to find this do a google search on "cmptree"...)
(I'm using HP POSIX/Korn)
Consider the scenario of a pre-production environment (box 1) and a production environment (box 2) I would like to check if some files on both boxes match or not.
It's quite straightforward on one box:
#----------------------------------------------------
# Function to compares files and display differences
#
# $1 = file1, $2 = file2
#
# cmp with option -s gives the following return codes:
# 0 - identical
# 1 - different
# 2 - inaccessable/other
#----------------------------------------------------
function fn030_compare_file {
cmp -s $1 $2
if [[ $? -gt 0 ]]
then
echo "*** Difference in files! -----> $1 <---> $2"
else
echo "*** OK, Files identical -----> $1 <---> $2"
fi
return
}
The only alternative I can think of is to copy the files to one box, then compare from there.
NOTE: I found an excellent shell script which recursively compares the contents of two directories on one box (to find this do a google search on "cmptree"...)
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LEARN ABOUT NETBSD
cmp
CMP(1) BSD General Commands Manual CMP(1) NAME
cmp -- compare two files SYNOPSIS
cmp [-l | -s] file1 file2 [skip1 [skip2]] DESCRIPTION
The cmp utility compares two files of any type and writes the results to the standard output. By default, cmp is silent if the files are the same; if they differ, the byte and line number at which the first difference occurred is reported. Bytes and lines are numbered beginning with one. The following options are available: -l Print the byte number (decimal) and the differing byte values (octal) for each difference. -s Print nothing for differing files; return exit status only. The optional arguments skip1 and skip2 are the byte offsets from the beginning of file1 and file2, respectively, where the comparison will begin. The offset is decimal by default, but may be expressed as an hexadecimal or octal value by preceding it with a leading ``0x'' or ``0''. The cmp utility exits with one of the following values: 0 The files are identical. 1 The files are different; this includes the case where one file is identical to the first part of the other. In the latter case, if the -s option has not been specified, cmp writes to standard output that EOF was reached in the shorter file (before any differences were found). >1 An error occurred. SEE ALSO
diff(1), diff3(1) STANDARDS
The cmp utility is expected to be IEEE Std 1003.2 (``POSIX.2'') compatible. BSD
June 6, 1993 BSD