Category: sysadmin

There are RPM packages for Fedora but doesn’t seem one for CentOS. There is no updated instructions on running BOINC client via command line. 1) Download and run boinc_6.2.15_i686-pc-linux-gnu.sh 2) Run “./boinccmd –project_attach www.worldcommunitygrid.org ” (Log into WCG, the key can be found on menu My Profile, near the bottom) 4) Run “./run_client –daemon” to…

This is from one of our pretty old servers more /etc/sysctl.conf # Kernel sysctl configuration file for Red Hat Linux # # For binary values, 0 is disabled, 1 is enabled. See sysctl(8) for # more details. # Controls IP packet forwarding net.ipv4.ip_forward = 0 # Controls source route verification net.ipv4.conf.default.rp_filter = 1 # Controls…

If you see this error when your PHP version is already 5.x, make sure you install “yum install php-xmlrpc” and might have to restart the web server (just to be sure). PHP Fatal error: Class ‘DOMDocument’ not found in xxx

Be careful when you first try gettext in PHP, it can be very unreliable/unpredictable because of different naming conventions. $vLang = ‘vi_VN’; $vDomain = ‘MyApp’; putenv(“LANGUAGE=”.$vLang); putenv(“LANG=”.$vLang); bindtextdomain($vDomain,AS_BASEDIR.’locale’); bind_textdomain_codeset($vDomain,”UTF-8″); setlocale(LC_ALL,$vLang.”.utf8″,$vLang.”.UTF8″,$vLang.”.utf-8″,$vLang.”.UTF-8″,$vLang); textdomain($vDomain); MyApp.po vs MyApp.mo PO is the human-readable and you perform the translation in here. MO is the binary file and it’s cached by Apache.…

Recently we did an upgrade to CentOS 5.3 and rrdtool stopped working, specifically, rrdgraph. The reason is that there is no font installed in the system (not sure why, you can check it via “fc-list”). To fix this, do an “yum install xorg-x11-fonts-Type1” and make sure you see some fonts listed in “fc-list”. Also assume…

If you try to ping/traceroute and got this message, there are several places to look. First, disable the firewall and if it works again then you know it’s the firewall. In this case, APF. An call to “iptables -L -n” might be able to narrow down the root cause. PING 173.x.x.x 56(84) bytes of data.…

I just start playing with EC2 today and these are some useful notes and observation. The small standard instance is quite slow, only scores 50 under Unixbench-WHT. Our quads E5405 are around 410+, Q9550 is at 650-750. I also was confused about S3 versus EBS. The console management makes life much easier, but could be…

Download the Storage Manager RPM for your card model and architecture from their site http://www.adaptec.com/en-US/support/raid/ If you run /usr/StorMan/arcconf and get this error: ./arcconf: error while loading shared libraries: libstdc++.so.5: cannot open shared object file: No such file or directory Do this export LD_PRELOAD=/usr/StorMan/libstdc++.so.5 root@r StorMan]# ./arcconf | UCLI | Adaptec uniform command line interface…