To trim a log file on my windows box I tried the lines below in a bash script. (my bash is 4.1.10(4)) cat "$LOG" | gzip > "$LOG.old.gz" > "$LOG" The resulting archive was corrupt. Directly compressing like gzip "$LOG" works OK but is not suitable in my case as the logging service constantly writes to the file I also tried the -c and -a options of gzip but did not succeed. >From my investigation I suspect there is something with textmode and binmode but I do not fully understand how to deal with it. What I finally found is that bzip2 works in the above line. So my solution is to use bzip2 instead of gzip. So my question is: why can't gzip do it automatically if bzip2 can?
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