Tag Archives: linux

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Recovery: Recover files from SD Cards or dd image

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Hi,

linux has 3 tools for recovering files from a (damaged) SD Card or from an dd image taken by ddrescue. Usually all tools need an empty output directory.

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Linux, Network

Network: Forwarding SNMP Traps by mail with snmptrapd and snmptt

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Hi,

this post describes a simply way to forward all traps by E-Mail received via SNMP.

This process is splited in several steps

  • Receive the traps => snmptrapd
  • snmptrapd calls the trapshandler script after each received trap. The trap details are handed over to the script by STDIN
  • The trap handler is /usr/sbin/snmptthandler. This script spools all traps to /var/spool/snmptt
  • The snmptt gets the traps from the spool folder, translate them in a human readable format and calls a custum script defined by snmptt.conf

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Linux

Linux: Switch keyboard layout in (bash) shell

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linux allows to change the keybaord layout “on the fly”.
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Debian

Debian: Enable apt debug logging

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for troubleshooting purposes (i.e. certificate issues) it is sometimes to enable the debug logging of apt.
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Debian

Debian: Disable certificate crl check for apt

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Hi,

there is an issue in the openssl libraries < version 3 that an crl check of an certificate fails if the file size of the crl file is greater then 100kB.

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