Gentoo Hints

mysqldump -u root -p --all-databases | gzip > 2015-05-30_mysql_sql.gz
pg_dumpall -U postgres | gzip -c > 2015-05-30_all.dbs.out.gz
emerge --search zabbix

find /path/to/directory -type f -print0| xargs -0 rm

or

find /path/to/directory -type f -exec rm {} \;