test udp connectivity
On server side: On client side: Also on client side in another terminal: It should return something like CONNECTED
Category: linux
RDP from Debian with multiple monitors/screens/displays
xfreerdp /u:USER /p:PASS /d:DOM /multimon /v:IP:3389 /cert-ignore
OPSI | ProductDependency
I.e. uninstall a 32 bit version before installing the 64 bit stuff to avoid parallel 32/64 bit instances on the same machine. [ProductDependency]action: setuprequiredProduct: userland-irfanview-438requiredAction: uninstallrequiredStatus: not_installedrequirementType: before
courier-imap + maildrop | sophisticated mail header tuning before delivery
Your keywords are maildropfilter and xfilter.
Postfix | get the original rcpt to into your header
You have a cascade of postfixes and aliases your mails are traversing through and are losing the original recipient address? Simply add a header line with first servers postfix. Tune your main.cf and add something like the ‘detect_recipients‘ line here: smtpd_recipient_restrictions = check_recipient_access regexp:/etc/postfix/specials/denied_recipients, check_recipient_access regexp:/etc/postfix/specials/allowed_recipients, check_recipient_access regexp:/etc/postfix/specials/detect_recipients, check_recipient_access regexp:/etc/postfix/specials permit_mynetworks, reject_unauth_destination Your detect_recipients file: […]
Ubuntu/Kubuntu freezes on shutdown
Remove chrome-remote-desktop if installed.
ZAMMAD | search fails – no users in user management
rebuild the elasticsearch index: zammad run rake searchindex:rebuild
decode quoted printable
i.e. from encoded mailheaders (=?UTF-8?Q?Thomas_Gr=c3=a4fner?=) or simply use the qprint command
sql | find updated rows
Create a helper table, containing rows md5 hashes: Get a rows hash from your main table you want to watch rows: Write it into your helper table: Now check your main table rows for changed md5’s:
bytes and bones 
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