Linux

Creating an UEFI bootable Linux USB stick

Feb 26, 2015 · 2 min read · Windows Linux UEFI ·

This article explains how to create a bootable USB stick with Linux that can be used to boot UEFI-systems.

Time conversion using Bash

Jan 30, 2013 · 2 min read · Linux Bash ·

This article show how you can obtain the UNIX epoch time (number of seconds since 1970-01-01 00:00:00 UTC) using the Linux bash “date” command. It also shows how you can convert a UNIX epoch time to a human readable time. Obtain UNIX epoch time using bash Obtaining the UNIX epoch time using bash is easy. Use the …

Configure static IP Debian Linux

Feb 21, 2011 · 1 min read · Linux Networking Bash Debian ·

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The purpose of this small message is to show how you can configure a static IP address in Debian Linux. I know that other sites have more detailed explanations on this (and the man page too), but I put it here mostly as a reminder to myself. Add the following content in /etc/networking/interfaces to configure a static …

Concatenating lines with sed

Mar 25, 2009 · 1 min read · Linux Bash sed ·

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An example of how you can concatenate lines from an input file using the sed command line tool. Suppose you have the following file: AA 123 BB 456 CC 789 And you want to transform it into the following: AA; 123 BB; 456 CC; 789 This can easily be achieved by using the Linux command sed. However, putting all …

Nagios plugin to check the currently used bandwidth

Oct 4, 2008 · 2 min read · Linux Nagios Monitoring ·

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This page shows you how you can create a Nagios plugin to check how much bandwidth the server is currently using. In order to do this, we will use the tool vnstat. This tools offers the functionality to check how much bandwidth you use over the last 5 seconds. The Nagios plugin you can find here does not follow the …

Automatically redirect non-existing pages to the home page in Apache

Sep 7, 2008 · 2 min read · Linux Apache ·

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How to configure Apache so that requests for non-existing pages are redirected to the home page. In some occasions, you don’t want people to get 404 messages when they surf to pages or folders that don’t exist on your web server (anymore). For example, when you have Basic Authentication, end users only get the pop-up …

Finding SGID files

Jun 13, 2008 · 4 min read · Linux Bash Audit ·

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How to find SGID files. There are 2 ways to find SGID files:

You can directly search for them using the find command \ You can take a complete listing of the file system, and searching through that listing afterwards \ The advantage of using the find command is that you directly have the information you need. …

Finding SUID files

Jun 13, 2008 · 5 min read · Linux Bash Audit ·

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How to find SUID files. There are 2 ways to find SUID files:

You can directly search for them using the find command \ You can take a complete listing of the file system, and searching through that listing afterwards \ The advantage of using the find command is that you directly have the information you need. …

Using openssh without a password

Feb 10, 2008 · 3 min read · Security Linux ·

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How to configure OpenSSH to use SSH keys for authentication instead of a password. To connect to a server running openssh To connect to a server running another ssh implementation Server is running openssh To enable logging in, without a password, on machine “remote” from machine “local”, in both cases as user “pete”, …

Using sed

Feb 10, 2008 · 1 min read · Linux Bash sed ·

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Some more advanced examples of how to use the sed command in Linux. Add a character to the beginning of a line (e.g. the | character): sed -e 's/^/|/' orig.txt > new.txt Change a file from Unix to Windows format (i.e. add a \r at the end of the line): sed -e 's/$/\r/' myunix.txt > mydos.txt Change a file from Windows …