WP Cache Error “semget() failed: Permission denied” Solved

For some reason, the Planet MY Blog WordPress was not accessible due to WP Cache Error “semget() failed: Permission denied” for the past few days.

After some investigation, I found the problem and you can easily solve by opening the wp-cache config file “wp-cache-config.php” which you should be found in the /wp-content/ directory.
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May 7, 2010 · Filed Under Tips

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Google Public DNS Down?

Google just announced Google Public DNS, a new service that lets consumers use Google as their DNS service provider which similar to OpenDNS.

What is Google Public DNS?
Google Public DNS is a free, global Domain Name System (DNS) resolution service, that you can use as an alternative to your current DNS provider.

To try it out:
* Configure your network settings to use the IP addresses 8.8.8.8 and 8.8.4.4 as your DNS servers or
* Read our configuration instructions.

Check out more details about Google Public DNS FAQ here.
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December 4, 2009 · Filed Under Tips

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Missing /var/log/lastlog

The /var/log/lastlog file is a lastlog logging file which save all the last user login logs.

planetmy:~ # rpm -qf /usr/bin/lastlog pwdutils-3.x.x.x-xx.xx

The Linux lastlog command use to prints the contents of the last login log. The login-name, port, and last login time will be printed.

For an example:
kajarona pts/137 140.171.171.73 Tue Oct 13 14:31:55 +0200 2009 aszg pts/82 140.171.171.11 Wed Nov 4 07:14:24 +0100 2009 ciakp pts/111 140.171.171.11 Tue Nov 3 07:44:41 +0100 2009 tkaj pts/68 140.171.171.64 Tue Nov 3 12:32:05 +0100 2009 ragab pts/108 149.223.30.18 Wed Nov 4 12:55:46 +0100 2009 aqelsp **Never logged in** qrsnid pts/169 149.223.30.22 Thu Nov 5 08:52:10 +0100 2009 qqacharaj **Never logged in** poygies pts/187 140.171.171.17 Thu Nov 5 09:50:33 +0100 2009 bojakt pts/11 140.171.171.101 Wed Nov 4 15:03:47 +0100 2009 chomata pts/182 149.223.20.86 Thu Nov 5 10:16:33 +0100 2009
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November 5, 2009 · Filed Under Open Source, Tips

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Telnet service_limit error

Previously I posted Inactive TELNET session timeout, How To Check Number of SSH and Telnet session and today I would like to share something related to TELNET again. In fact, I know telnet is NOT secure.

Referring to /var/log/xinetd.log(telnet parked under xinetd services), if you found something look like FAIL: telnet service_limit mean telnet instances are over limit.

09/8/26@10:43:23: FAIL: telnet service_limit from=192.168.10.180
09/8/26@10:43:23: FAIL: telnet service_limit from=192.168.10.180
09/8/26@10:43:24: FAIL: telnet service_limit from=192.168.10.180
09/8/26@10:43:24: FAIL: telnet service_limit from=192.168.10.180
09/8/26@10:43:25: FAIL: telnet service_limit from=192.168.10.180
09/8/26@10:43:25: FAIL: telnet service_limit from=192.168.10.180
09/8/26@10:43:26: FAIL: telnet service_limit from=192.168.10.180
09/8/26@10:43:26: FAIL: telnet service_limit from=192.168.10.180
09/8/26@10:43:27: FAIL: telnet service_limit from=192.168.10.180

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August 26, 2009 · Filed Under Open Source, Tips

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Google accounts on Twitter

If you have Twitter account and if you’re fans of Google, you may follow Google accounts on Twitter listed below:

twitter.com/Google – our central account
twitter.com/Blogger – for Blogger fans
twitter.com/GoogleCalendar – user tips & updates
twitter.com/GoogleImages – news, tips, tricks on our visual image search
twitter.com/GoogleNews – latest headlines via Google News
twitter.com/GoogleReader – from our feed reader team
twitter.com/GoogleVoice – updates & info on Google Voice*
twitter.com/iGoogle – news & notes from Google’s personalized homepage
twitter.com/GoogleStudents – news of interest to students using Google
twitter.com/YouTube – for YouTube fans
twitter.com/YouTubeES – en Espanol
twitter.com/GoogleAtWork – solutions for IT and workplace productivity
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July 17, 2009 · Filed Under Tips, Web 2.0

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