# log rotation **URL:** \ **Category:** Zeek\ **Created:** [March 26, 2017, 6:18pm UTC](https://community.zeek.org/t/log-rotation/4744 "2017-03-26T18:18:03Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Ul\_Asad\_Hafiz](https://avatars.discourse-cdn.com/v4/letter/u/dec6dc/32.png) [@Ul\_Asad\_Hafiz](https://community.zeek.org/u/Ul_Asad_Hafiz)\ **Post date:** [March 26, 2017, 6:18pm UTC](https://community.zeek.org/t/log-rotation/4744/1 "2017-03-26T18:18:03Z")
Hi, I am analysing a large number of “pcap” files using, bro –r \*.pcap my\_bro.script The problem is that for each new pcap file, bro over-writes the previous \*.log files if I don’t change my working directory. Is there a way of controlling the rotation of log files? I know that “broctl” has this time base rotation, but is there any sort of rotation control when bro is run from command line? I can change the working directory, but I want to have all my results in a single a log file (files) so that it is easy to query them. Regards Asad ---
**Author:** ![johanna](https://avatars.discourse-cdn.com/v4/letter/j/50afbb/32.png) [@johanna](https://community.zeek.org/u/johanna)\ **Post date:** [April 5, 2017, 4:37pm UTC](https://community.zeek.org/t/log-rotation/4744/2 "2017-04-05T16:37:29Z")
Hi Asad, Bro currently does not support appending data to the same log file over several runs. The typical way to solve this is to have a script which generates a new directory for each run, automatically changes the working dorectory to it, and runs Bro from there. Afterwards you can concatenate the output files. I hope this helps, Johanna ---
**Author:** ![system](https://canada1.discourse-cdn.com/flex011/uploads/zeek/original/1X/f09d732bc2cc7c7cc7e35db67cf4e1d5233ce7a7.png) [@system](https://community.zeek.org/u/system)\ **Post date:** [May 6, 2022, 3:44pm UTC](https://community.zeek.org/t/log-rotation/4744/3 "2022-05-06T15:44:46Z")