Logging
Server log configuration and management

TOP
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 Logging interval 
 To change ATOP's logging interval edit the below file: 
 vim /usr/share/atop/atop.daily 
 In here, edit the LOGINTERVAL to your desired time frame (seconds): 
 example for 1 minute logging: 
 LOGINTERVAL=60 
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 ATOP Controls 
 k = kill PID 
 b = date/time 
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LogRotate
LogRotate Configuration. 
 https://www.redhat.com/sysadmin/setting-logrotate 
 If not installed already (it usually is), install the logrotate service: 
 apt install logrotate 
 yum install logrotate 
 Configuration of logrotate 
 /etc/logrotate.conf - used to define default parameters for logrotate 
 /etc/logrotate.d - used for configuring logrotate for specific logs 
 example configuration: 
 /root/.unison/unison.log {

   rotate 7

   daily

   compress

   missingok

   notifempty
} 
 Common options you may see used in a configuration file include: 
 
 
 compress  - this indicates the log files should be compressed once rotated.  gzip  is used by default. 
 
 
 daily  /  weekly  /  monthly  /  yearly  - this specifies that the log file should be rotated every day, week, or month. 
 
 
 ifempty  /  notifempty  - these specify whether to either rotate the log file even if it’s empty, or to not rotate the log file if it’s empty, respectively. 
 
 
 missingok  /  notmissingok  - these options will either not generate an error, or will generate an error if the log file does not exist.  notmissingok  is the default. 
 
 
 rotate  - this is supplied with a number argument, which specifies how many times the log files are rotated before being removed. 
 
 
 size  - this specifies the size a log file has to reach before it is rotated. 
 
 
 Running LogRotate 
 LogRotate usually comes set up with a daily cron: 
 ls /etc/cron.daily/
apport  apt-compat  dpkg  logrotate  man-db  plocate 
 You can also run a logrotate configuration at any time: 
 logrotate name