itdoctor (Page 35)

Driver identifier is the best and powerful tool allows you to find the latest drivers for printers, LAN cards, modems, scanners, graphic cards, sound cards, mother boards and many other computer or CPU devices. This great utility software scans for outdated drivers and then updates them to latest ones automatically from the server. Driver identifier also has the portable version of Driver identifier 4.2.7 for windows. Driver identifier provides you help for determining the outdated system hardware drivers to latest and new ones. This is simple, fast and powerful application used to get the right drivers for your personal computer. It can easily download theRead More →

After installing Centos and Sendmail , you can’t send mail from PHP , you might have a warning ” can not initial mail function ” from php page Resolution: Centos 5 has SELinux enabled by default. Use the command getenforce to determine whether or not SELinux is enabled. If SELinux is enabled you need to change the security settings for the web server. By default the web server daemon and any scripts it runs can’t make any network connections, and you need one to send e-mail. Depending on the mechanism used by Horde enabling mail functionality may be sufficient: setsebool httpd_can_sendmail=on or you need toRead More →

sudo usermod -a -G sudoRead More →

watch -n 1 “ps u -C apache2,apache,php”Read More →

Put the command you want to run on this file /etc/rc.localRead More →

watch -n 1 “echo -n ‘Apache Processes: ‘ && ps -C apache2 –no-headers | wc -l && free -m”Read More →

Sometimes there can be so many frozen mails in the Exim mail queue. To know the number of frozen mails in the mail queue, you can use the following command exim -bpr | grep frozen | wc -l In order to remove all frozen mails from the Exim mail queue, use the following command exim -bpr | grep frozen | awk {‘print $3’} | xargs exim -Mrm You can also use the command given below to delete all frozen mails exiqgrep -z -i | xargs exim -Mrm If you want to only delete frozen messages older than a day, you can try the following exiqgrepRead More →

If you run a replicated MySQL setup and have a master failure, you may see the following error in your error log. [ERROR] Error reading packet from server: Client requested master to start replication from impossible position ( server_errno=1236) At this point your slave will not be replicating and you will need to recover from the situation. But why did it occur in the first place and what does it mean to your data integrity? Why it occurs This error will occur if the master stops unexpectedly. This could be as a result of a hardware failure (like a disk error) or a power loss.Read More →

How to fix MySql Replication Error 1236 We have some websites that use two database servers in master-master replication. Recently one of the servers died and had to be resurrected. (They are cloud based and SoftLayer doesn’t seem to have their cloud-based offering thing nailed down, yet. Every week one of them will go down and be unresponsive until tech support does some magic.) After one of the servers was brought back up the other server would not connect. It “Slave_IO_Running: No” and “Seconds_Behind_Master: null” which means it was not playing nicely. First, I went to the MySql log files, which for this server isRead More →

When you connect your IPAD/IPHONE to the computer, you used to be able to see photos under DCIM folder , now it’s blank. It’s because your iphone is locked , this is to prevent someone copying your data when they don’t know your ipad/iphone password. How to fix? – If your ipad/iphone is connected to the PC already , disconnect it. – Unlock the phone – connect to the PC again – make sure that your iphone/ipad is in unlock status.Read More →