Teradata concatenate columns with nullJul 07, 2020 · I am in the process of converting my cron jobs to systemd timers. I have used timers for a few years, but usually, I learned just enough to perform the task I was working on. While doing research for this systemd series, I learned that systemd timers have some very interesting capabilities. Most log files are kept in the /var/log directory. Journalctl can be used to read entries in the systemd journal. Journal behavior can be controlled from the /etc/systemd/journald.conf file. Logger will send a text message to a log file. Logger -p can specify facility and level names. You can control log rotation through /etc/logrotate.conf.