December 18th, 2011 
Tum.
Fsck stands for “file system check” and it is used to check and optionally repair one or more Linux file systems.
If you want to force fsck on the next reboot or next boot. Here is a quick tip that will show how you can tell your Linux system to perform a fsck during the next boot. There are two pretty simple procedures:
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December 14th, 2011 Tum.
You’re know, Crontab will not work on a specific day of the month but it can be a specific minute, hour, month and day of the week. So, if you need to run some command in the first day of month or last day of month you can’t use crontab to scheduled it. However, you can use crontab with shell script to filter out a particular date that you need to run the command.
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December 10th, 2011 Tum.
Historically, if you wanted to host multiple SSL enabled Web sites, you had to have an unique IP address for each site. With the advent of SNI, one SSL certificate per unique IP address is no longer necessary. The Server Name Indication (SNI) is a TLS extension which makes the configuration of SSL-enabled name-based virtual hosts possible. This extension eliminates the need for the assignment of one IP address per secure virtual host, so all secure virtual hosts can share the same IP address and port combination. However the SNI has only recently gained support in browsers. The browsers that have been confirmed to support SNI are:
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November 11th, 2011 Tum.
Once you have set up MySQL replication master, but unfortunately the “show master status” command shows the following, rather than any useful output:
mysql > show master status; Empty set (0.00 sec)
While the error log at /var/log/mysql.err is an empty file.
Solution for fix ‘show master status’ shows ‘Empty set (0.00 sec)’:
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August 16th, 2011 Tum.
When you need to view last login in the linux system, the “last” command might the answers for you. However you also find-in the “/var/log/secure” for get more information of user login.
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July 24th, 2011 Tum.
Coova chilli hotspot is a project that developed from Chilli hotspot, which the Chilli hotspot seems to be stopped developing. And for anyone who wants to download rpm file for RedHat Enterprise or CentOS would find it difficult. Which makes some people turn to Ubuntu instead, because the package has been made out to be ready for download.
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July 10th, 2011 Tum.
It looks like that CentOS will set mega release — the CentOS 6 — in a few days. Yesterday, the CentOS team is allowing the mirror sites to start syncing out to external mirrors usually is left for a few days and CentOS to ensure that enough mirrors have the packages before opening it up for download. However, CentOS team has already released the torrent version in 2 versions, the CentOS-6.0/i386 ISOS and the CentOS-6.0/x86_64 ISOS. So, you can download the torrent files from this links below:
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June 12th, 2011 Tum.
Openldap on Red Hat Enterprise 6 has changed the new configuration file, which is a configuration tree style. If you has configured the Openldap in RHEL5 you may be confused when you completely configured for the slapd.conf and start ldap service, then use ldapadd or ldapsearch command for query data but it shown error “ldapadd ldap_bind: Invalid credentials (49)“. So, in this article I will give the way for solve the problem.
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March 23rd, 2011 Tum.
Restricting SSH Access Attempts Using DenyHosts