Неплохой парсер для логов.
apt-get install pflogsumm
pflogsumm -d today /var/log/mail.log
apt-get install pflogsumm
pflogsumm -d today /var/log/mail.log
ls -lah /var/
find /var/log-type f -mtime +30 -exec rm -rf {} \;
Взято с http://linux-notes.org/udalyat-fajly-starshe-30-dnej-na-linux/Services -> Squid Proxy Server -> ACLs -> Whitelist и добавляем web.whatsapp.com