Linux: Timeouting commands in shell scripts

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Oct 122014
 

Article by Mikko Ohtamaa first posted on his blog

Often you want to automatize something using shell scripting. In a perfect world your script robot works for you without getting tired, without hick-ups, and you can just sit at the front of your desk and sip coffee.

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Then we enter the real world: Your network is disconnected. DNS goes downs. Your HTTP hooks and downloads stall. Interprocess communication hangs. Effectively this means that even if your script is running correctly from the point of operating system it won’t finish its work before you finish your cup of coffee.

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1 week with Mint Nadia XFCE

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Dec 302012
 

On the 21 of December Linux Mint 14 Xfce has been released, codename Nadia.
This release of Mint is based on Ubuntu 12.10 and shipped with the XFCE desktop environemnt as my readers probably know I’ve installed Mint 13 XFCE on my new desktop and so I’ve decided to upgrade my installation to this new release.

As first thing, do I suggest to upgrade to this release ?
Yes and no, Mint 13 is based on Ubuntu 12.04 that is a Long Term Support distribution, this means that like other LTS releases 12.04 will have updates for 3 years, and will include point releases that bundle updates to shorten downloads for users installing the release later in its lifecycle. The point releases and dates are: 12.04.1 (23 August 2012), 12.04.2 (31 January 2013), 12.04.3 (15 August 2013) and 12.04.4 (24 January 2014). There are no further point releases scheduled after the release of Ubuntu 14.04 LTS.

So if you are happy with your software and all your hardware works you have no strong reasons to do this.

On the other hand, if like me you have a D-LINK N 150 aka DWA-125 or some other hardware that don’t work perfectly with your Kernel an update could help you, spoiler: This upgrade helped me in removing all the proprietary drivers in my installation.
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CLI tools for Network analysis 2

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Sep 252010
 

networkAfter ping, telnet and dig we continue to see other useful tools for network analysis done by the command line.

Traceroute

traceroute is a computer network tool used to show the route taken by packets across an Internet Protocol (IP) network. An IPv6 variant, traceroute6, is also widely available.

The traceroute tool is available on practically all Unix-like operating systems. Variants with similar functionality are also available, such as tracepath on modern Linux installations and tracert on Microsoft Windows operating systems. Windows NT-based operating systems also provide PathPing, which provides similar functionality.

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Opendns, Google Dns or ISP ?

Opendns, Google Dns or ISP ?

In recent years we heard most often about using alternate DNS to those provided by your ISP. But why not use your ISP’s DNS in theory it should be as fast as possible since there are fewer network hops to reach it, but the alternate DNS, provide additional services (such domains are known to report […]

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Local dns-cache for faster browsing

Local dns-cache for faster browsing

A DNS server resolves domain names into IP addresses. So when you request “google.com” for example, the DNS server finds out the address for the domain, and sends your request the right way. You can run a DNS cache on your computer. This will speed up the process of looking up domain names when browsing. […]

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