ssh client hang after a few minutes of inactivity
specify the parameter “ServerAliveInterval 60” in /etc/ssh_config or /etc/ssh/ssh_config. for more info, man ssh_config
Exim – anti-spam per domain setting
acl_check_rcpt: blah … blah … blah … deny message = rejected as $sender_host_address is blacklisted in $dnslist_domain\n$dnslist_text domains = domain-one.com : domain-two.com : domain-three.com dnslists = sbl-xbl.spamhaus.org blah … blah … blah … reference link : http://www.exim-new-users.co.uk/content/view/65/39/
screen in FreeBSD default to csh as suppose to bash (preferred)
After changing bash shell to a new user using chsh, screen needs ~/.bashrc for environment settings, which need “ln -s ~/.bash_profile ~/.bashrc”.
run sql/queries (postgres) within bash
e.g. for things-to-buy in $(psql -d database-name -U username -c “select item from glossaries where priority = ‘urgent’ “; do blah, blah, blah … done
secure copy with failover – rsync & ssh
e.g. rsync -av –progress -e ‘ssh -i /alternate/id/file’ sshusername@host:/directory/or/file /destination/directory/or/file – should the copy process terminated through the half way, just run the exact command again and it will continue from the file is failed previously, without copying again starting…
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