My old Logitech B175 was lost, i still have the receiver. One day i found another Logitech Mouse M325, this one doesn’t have the receiver. How can i pair my B175 receiver with the M325. After some research, this tool has resolved my issue: http://support.logitech.com/en_ch/software/logitech-connection-utility-software Hope it help.Read More →
We have seen many cases where the client didn’t close the connection correctly, the process is stuck at CLOSE_WAIT status, i never clear the database connection. We have this script to kill all close_wait connection. <? //Some apache process are in close_wait //replace apache2 with other stuff (httpd..) $cmd=”netstat -ntp | grep CLOSE_WAIT | grep apache2″; $process_array=array(“httpd”,”apache2″); $hostname=trim(shell_exec(“hostname -s”)); if($hostname==’ubuntu’) $cmd=”netstat -ntp “; debug(“Running $cmd”); $netstat=shell_exec($cmd); $file_log=”/tmp/kill_close_wait.txt”; $arr=explode(“\n”,$netstat); //print_r($arr); $test=false;//if we are debugging- if we are debug – it will not killl $log=false; foreach($arr as $line) { $line=preg_replace(‘/\s{2,}/’,’ ‘, $line); $arr2=explode(‘ ‘,$line); if(isset($arr2[6]) && $arr2[6]<>’-‘) { //print_r($arr3); $arr3=explode(‘/’,$arr2[6]); $process_id=$arr3[0]; if($process_id==0) continue; $process_name=$arr3[1]; if(!in_array($process_name,$process_array)) continue; debug(“Found:Read More →
In some situations, our web server receive too many connections. The number is much higher than normal, that could be an issue with our code, or we are being attack. While waiting to find a solution, we need a solution to keep the service running. The easiest solution is to restart our web server when it’s go over our limit. We’ll keep the log what the server is running, then restart the server. Later on we can see our log and do the fine tuning. cnt=`ps -Af | grep apache2 | grep -v rotatelogs | grep -v grep | wc -l` now=`date +%Y-%m-%d_%H-%M` # changeRead More →
Below are the steps to fix this issue: 1. Shut down your old slave server and make a copy of the data directory to your new slave. Make sure you get the old slave’s master.info and relay-log.info files. Once you have a copy of the data directory, you can restart the old slave if desired. The rest of these steps are performed on the new slave. 2. Rename the master.info to master.info.oldslave and relay-log.info to relay-log.info.oldslave. 3. Edit /etc/my.cnf and add the line “skip-slave-start” (without the quotes) to the [mysqld] section. 4. Start the new slave. This will create new master.info and relay-log.info files. BecauseRead More →
Nagios config file is in /etc/nagios-plugins/config Nagios plugin script is in /usr/lib/nagios/plugins Read More →
JavaScript is disabled. nagiosgraph.js is not installed or wrong version. edit file nagiosgraph-apache.conf , <Directory “/usr/local/nagiosgraph/share”> Options None AllowOverride None # Order allow,deny # Allow from all require all granted </Directory> Read More →
If you can’t start nagios server, it could be the configuration file was wrong. Check it before restarting the server /usr/sbin/nagios3 -v /etc/nagios3/nagios.cfg Read More →
Add this to /etc/mysql/mysqld.conf/mysqld.conf [mysqld] sql_mode=IGNORE_SPACE,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION Read More →
Sendmail use “access” database to control who can use this email server to send email out. It’s easy, just edit this file /etc/mail/access , but access is a database file, after you edit it you need to recreate database map makemap hash /etc/mail/access < /etc/mail/access Put your control list in the at the end of the file: [email protected] REJECT cyberspammer.com REJECT TLD REJECT 192.168.0 RELAY 192.168.1 OK REJECT: reject all email from that source RELAY: allow that IP range to use our server as a relay. OK: allow to send any email even though it’s blocked in some other rules.Read More →