bdiff(1)bdiff(1)NAMEbdiff - diff for large files
file1 file2 [n]
compares two files and produces output identical to what would be pro‐
duced by (see diff(1)), specifying changes that must be made to make
the files identical. is designed for handling files that are too large
for but it can be used on files of any length.
processes files as follows:
· Ignore lines common to the beginning of both files.
· Split the remainder of each file into n-line segments, then
execute on corresponding segments. The default value of n is
recognizes the following command-line arguments:
file2 Names of two files to be compared by If file1 or
file2 (but not both) is standard input is used
n If a numeric value is present as the third argument,
the files are divided into n-line segments before
processing by Default value for n is 3500. This
option is useful when 3500-line segments are too
large for processing by
Silent option suppresses diagnostic printing by
but does not suppress possible error messages from
If the n and arguments are both used, the n argument
must precede the option on the command line or it
will not be properly recognized.
determines the language in which messages are displayed.
If is not specified in the environment or is set to the empty string,
the value of is used as a default for each unspecified or empty vari‐
able. If is not specified or is set to the empty string, a default of
"C" (see lang(5)) is used instead of
If any internationalization variable contains an invalid setting,
behaves as if all internationalization variables are set to "C". See
International Code Set Support
Single- and multi-byte character code sets are supported.
Standard input was specified for both files.
Only one file can be specified as standard input.
A non-numeric value was specified for the
n (third) argument.
Find differences between two large files: and and place the result in a
new file named
Do the same, but limit file length to 1400 lines; suppress error mes‐
produces output identical to output from and makes the necessary line-
number corrections so that the output looks like it was processed by
However, depending on where the files are split, may or may not find a
fully minimized set of file differences.