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Forcing sendmail to flush its host status

Last updated: 25/09/2015

If sendmail has a temporary problem delivering mail to another mail server then it will store the email in its queue and record the status of the destination host. When another ...

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Removing an entry from Squid proxy's cache

Last updated: 15/08/2015

Sometimes there is a need to delete a file that squid proxy has already downloaded and stored in its cache....

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Installing git hooks stored in a project's repository

Last updated: 01/06/2015

A project stored on a git repository might have its own useful hooks . These are usually stored in .git/hooks and are not committed to version control....

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Firewalling ntpd with iptables

Last updated: 10/05/2015

By default ntpd listens on all network interfaces, it requires to listen on an external interface in order to contact upstream NTP servers, if this is disabled then time syncing will be affected....

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