I’ve few Nagios checks that require root privileges but running nrpe as root user is not acceptable. I prefer to use sudo for only these few commands. Run visudo and coment out this line: #Defaults requiretty This change is crucial to get scripts working. Then add at the end of file: %nrpe ALL=(ALL) NOPASSWD:...

After reading some SEO stuff I wanted to add some meta tags to my WordPress blog. I found this site: codex.wordpress.org/Meta_Tags_in_WordPress external link . So WordPress thinks that it’s not necessary to have this meta tags any more… But I want it! 😃 Next funny thing is how they suggest to add meta tags: copy...

Let say you have MediaWiki installation but you lost admin credentials. If you have other account or if you could create one without any rights we’re in home 😉 We have few options to do this. Reset admin password We have to connect to database and use this SQL: UPDATE `user` SET user_password = CONCAT(...

I need to check memory usage of memcached server so I used: echo stats | nc 127.0.0.1 11211 STAT pid 2743 STAT uptime 263 STAT time 1395438951 STAT version 1.4.13 STAT pointer_size 64 STAT rusage_user 0.482926 STAT rusage_system 2.675593 STAT curr_items 8667 STAT total_items 10742 STAT bytes 23802513 STAT...

I have development server with postfix - I wanted to allow outbound traffic to one domain but cut off all the rest. I definitely do not want that test mail or any debug info goes to service users. I have to add something like that to /etc/postfix/transport: allowed.domain.com : * discard: Then run: postmap...

In recent Ansible update to 1.5 version there is really nice feature ssh pipelining. This option is serious alternative to accelerated mode. Just add to you config file (ex. ~/.ansible.cfg): [ssh_connection] pipelining=True Now run any playbook - you will see the difference 😄 Source (and extended info about):...

To najlepszy przepis na chrusty jaki znam - wychodzą bardzo kruche i delikatne. Składniki 4 zółtka, 4 łyżki wina białego lub czerwonego, 4 łyżki mąki. Sposób przygotowania Wszystkie składniki wymieszać i wyrobić. Ciasto powinno być mniej wiecej takie jak na pierogi. Bić pałką/wałkiem, składać na pół i tak kilka razy...

I had quite simple task - compare two lists of hosts and check if hosts from first one are also on the second one. I started with diff: diff -u biglist.txt hosts_to_check.txt | grep -E "^\+" It was fine but output needs some filtering to get what I want. I’ve found another example with grep: grep -Fxv -f biglist.txt...

I was thinking about allowing access to my website using SPDY protocol for better performance and security (and for fun of course 😃 ). But SPDY have one disadvantage - you need SSL certificate signed by known authority that will verfiy in common browsers. So you can’t use self signed certificates because everyone...

Learn how to change the default WSUS port from 8530 to 80 on Windows Server 2012, ensuring compatibility with older configurations and resolving IPv6-only issues.

After reading some good opinions about MariaDB I wanted to give it a try. Upgrade looks quite straight forward but I found some issues a little tricky. Installation Add repo and key: cat > /etc/apt/sources.list <<SRC deb http://mirrors.supportex.net/mariadb/repo/5.5/debian wheezy main deb-src...

I’ve been using different code editors for different purposes. Gedit was fine for small scripts but not for bigger projects. It lacks intelligent code completion (function/class names, etc.). I was searching for convenient editor for Python, Perl, Ruby with support for frameworks like Django, Rails, etc. I know...