服务日志问题：服务日志文件过大或丢失

sudo find /var/log -name "<service_name>.log"
ls -lh /var/log/<service_name>.log 

sudo gzip /var/log/<service_name>.log
sudo tar -czvf /var/log/<service_name>.log.tar.gz  /var/log/<service_name>.log

sudo truncate -s 0 /var/log/<service_name>.log

sudo nano /etc/logrotate.d/<service_name>

/var/log/<service_name>.log {
    daily
    rotate 7 
    compress
    delaycompress
    missingok
    notifempty 
    create 640 root adm
}

sudo find /var/log -name "<service_name>.log*"

sudo chown root:adm /var/log/<service_name>.log
sudo chmod 640 /var/log/<service_name>.log 

sudo systemctl restart <service_name>
sudo tail -f /var/log/<service_name>.log

sudo find / -name "<config_file_name>"
sudo nano /path/to/config_file

df -h
sudo apt-get clean 
sudo journalctl --vacuum-time=2weeks

sudo ls -l /var/log/<service_name>.log
sudo chown root:adm /var/log/<service_name>.log 
sudo chmod 640 /var/log/<service_name>.log

sudo apt-get install logwatch
sudo nano /etc/logwatch/conf/logwatch.conf 

sudo journalctl -xe