NAME

       atopcat - concatenate raw log files to stdout

SYNOPSIS

       atopcat [-dv] rawfile [rawfile]...

DESCRIPTION

       The  program  atopcat  can  be  used  to concatenate several raw log files into one stream
       (stdout).  In this way, raw log files can be merged into one larger  file  by  redirecting
       stdout to a file. Alternatively, merged data from several raw log files can be transferred
       directly into atop or atopsar via a pipe.

       Options:

       -d   dry-run: read logfile(s) but do not generate output on stdout

       -v   verbose: print one line per sample containing date/time, interval length in  seconds,
            compressed  length  of  the  system-level  information  and  compressed length of the
            process-level information.

EXAMPLES

       Concatenate the raw log files of five contiguous working days, write it into a new raw log
       file for that week and view that week interactively:

         atopcat /var/log/atop/atop_2020021[0-4] > week_2020_7

         atop -r week_2020_7

       Concatenate the raw log files of a week and view that week interactively (since atop reads
       from a pipe, previous intervals can not be retrieved while viewing):

         atopcat /var/log/atop/atop_2020021[0-6] | atop -r -

       Concatenate all raw log files of January 2020 and generate parsable output about  the  CPU
       utilization:

         atopcat /var/log/atop/atop_202001?? | atop -r - -PCPU

       Concatenate  the  daily  raw  log  files  of February 3 and 4, and generate a report about
       memory utilization from 14:00h on the first day till 11:00h on the second day:

         atopcat /var/log/atop/atop_2020020[34] |
                     atopsar -m -r - -b 202002031400 -e 202002041100

       Repair a raw log file from which the last interval has not been completely  written  (e.g.
       if you intend to expand the file with new samples):

         atopcat /var/log/atop/atop_20200303 > /tmp/repaired

       In  the latter case, atopcat reports that the input file is incomplete and stops after the
       last consistent sample.

SEE ALSO

       atop(1), atopsar(1), atopconvert(1)
       https://www.atoptool.nl

AUTHOR

       Gerlof Langeveld (gerlof.langeveld@atoptool.nl)