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Logs

Read, filter and analyze log files: search access logs by IP, status code and bot, use journalctl precisely and find errors fast.

21 one-liners: 20 harmless, 1 caution, 0 destructive

access-log 11awk 9troubleshooting 4logrotate 4journalctl 4systemd 4apache 3plesk 3grep 2seo 2load 2time-range 2disk-space 2nginx 2

All Logs one-liners

Analyze Googlebot requests in the access log

#grep -i "googlebot" /var/www/vhosts/system/example.com/logs/access_ssl_log | awk '{print $7}' | sort | uniq -c | sort -rn | head -20
harmless

Analyze server errors (5xx) in the access log

#awk '$9 ~ /^5[0-9][0-9]$/ {print $9, $7}' /var/www/vhosts/system/example.com/logs/access_ssl_log | sort | uniq -c | sort -rn | head -20
harmless

Count HTTP status codes in the access log

#awk '{print $9}' /var/www/vhosts/system/example.com/logs/access_ssl_log | sort | uniq -c | sort -rn
harmless

Count requests per minute in the access log

#awk '{print substr($4, 2, 17)}' /var/www/vhosts/system/example.com/logs/access_ssl_log | sort | uniq -c | sort -rn | head -20
harmless

Filter the access log by time range

#awk -v von="09/Oct/2026:14:00" -v bis="09/Oct/2026:15:00" 'substr($4, 2) >= von && substr($4, 2) < bis' /var/www/vhosts/system/example.com/logs/access_ssl_log
harmless

Find the domains with the most requests on Plesk

#wc -l /var/www/vhosts/system/*/logs/access_ssl_log 2>/dev/null | sort -rn | head -20
harmless

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Find the largest log files on the server

#du -ah /var/log 2>/dev/null | sort -rh | head -20
harmless

Find the most common user agents and bots in the access log

#awk -F'"' '{print $6}' /var/www/vhosts/system/example.com/logs/access_ssl_log | sort | uniq -c | sort -rn | head -20
harmless

Find the most frequent 404 errors in the access log

#awk '$9 == 404 {print $7}' /var/www/vhosts/system/example.com/logs/access_ssl_log | sort | uniq -c | sort -rn | head -20
harmless

Find the most requested URLs in the access log

#awk '{print $7}' /var/www/vhosts/system/example.com/logs/access_ssl_log | sort | uniq -c | sort -rn | head -20
harmless

Find the top IP addresses in the access log

#awk '{print $1}' /var/www/vhosts/system/example.com/logs/access_ssl_log | sort | uniq -c | sort -rn | head -20
harmless

Follow a log file live and filter by keywords

#tail -f /var/log/syslog | grep --line-buffered -iE "error|warn|fail"
harmless

Follow the error log of a Plesk domain live

#tail -f /var/www/vhosts/system/example.com/logs/error_log
harmless

Force log rotation immediately

#logrotate -vf /etc/logrotate.d/nginx
caution

Search rotated and compressed logs too

#zgrep -h "Out of memory" /var/log/syslog*
harmless

Show all requests from one IP address in the access log

#awk -v ip="203.0.113.10" '$1 == ip' /var/www/vhosts/system/example.com/logs/access_ssl_log | tail -50
harmless

Show journal logs for a single service

#journalctl -u nginx -n 200 --no-pager
harmless

Show logs from the previous boot

#journalctl -b -1 -n 200 --no-pager
harmless

Show only error messages in the system journal

#journalctl -p err -b --no-pager
harmless

Show system logs since a specific time

#journalctl --since "1 hour ago" --no-pager
harmless

Test a logrotate configuration without rotating

#logrotate -d /etc/logrotate.d/nginx
harmless

Read first, then run.

The commands on myline.de act directly on servers, files and databases. A wrong path or placeholder can delete data irreversibly or make a server unreachable.

  • All commands are provided without warranty and are not tested on every system.
  • Understand what a command does before running it, and check every placeholder.
  • Make a backup first and, if possible, try it on a test system.
  • You run commands at your own risk. Liability for damages is excluded to the extent permitted by law.