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 all over again.
