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Top Forums Shell Programming and Scripting Best performance to merge two files Post 303027332 by vgersh99 on Thursday 13th of December 2018 12:07:17 PM
Old 12-13-2018
Please define what you mean by merge.
Maybe providing a desired output given your sample inputs.
 

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acctmerg(1M)															      acctmerg(1M)

NAME
acctmerg - merge or add total accounting files SYNOPSIS
[options] [file] ... DESCRIPTION
reads its standard input and up to nine additional files, all in the format (see acct(4)) or an ASCII version thereof. It merges these inputs by adding records whose keys (normally user ID and name) are identical, and expects the inputs to be sorted on those keys. Options recognizes the following options: Produce output in ASCII version of Input files are in ASCII version of Print input with no processing. Produce a single record that totals all input. Summarize by user ID, rather than user ID and name. Produce output in verbose ASCII format, with more precise notation for floating point numbers. EXAMPLES
The following sequence is useful for making ``repairs'' to any file kept in this format: edit file2 as desired ... SEE ALSO
acct(1M), acctcms(1M), acctcom(1M), acctcon(1M), acctprc(1M), acctsh(1M), fwtmp(1M), runacct(1M), acct(2), acct(4), utmp(4). STANDARDS CONFORMANCE
acctmerg(1M)
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