How To Allow Telnet Through IPTables Under Centos / RedHat

May 10, 2011

CentOS / RedHat Linux server and by default firewall blocked out everything including telnet access. How do I allow telnet – port 23 thought Linux iptables firewall ?

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How To Install OpenSSH on Centos / RedHat

May 10, 2011

What is OpenSSH ? OpenSSH is a FREE version of the SSH connectivity tools that technical users of the Internet rely on. Users of telnet, rlogin, and ftp may not realize that their password is transmitted across the Internet unencrypted, but it is. OpenSSH encrypts all traffic (including passwords) to effectively eliminate eavesdropping, connection hijacking, […]

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How To Install ProFTPD on Centos / RedHat

May 9, 2011

What is ProFTPD? ProFTPD is a ftp server written for use on Unix and Unix-a-like operating systems, there is no support for native use under Microsoft Windows.

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MySQL Slow Query Log File

May 8, 2011

The slow query log consists of all SQL statements that took more than long_query_time seconds to execute and required at least min_examined_row_limit rows to be examined. The time to acquire the initial table locks is not counted as execution time. mysqld writes a statement to the slow query log after it has been executed and […]

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Install RPM File On CentOS / RedHat

May 8, 2011

rpm is a powerful Package Manager, which can be used to build, install, query, verify, update, and erase individual software packages. A package consists of an archive of files and meta-data used to install and erase the archive files. The meta-data includes helper scripts, file attributes, and descriptive information about the package. Packages come in […]

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Linux Hard Disk Speed Tests

May 8, 2011

While having a large hard drive is good for storing lots of data, it is also important for your computer to have a fast hard drive. Faster hard drives help your computer run more smoothly. You can use the hdparm tool or dd command to determine your disk speeds from the Linux command line.

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Determine the autonegotiated ethernet connection speed and duplex using the mii-tool command

May 2, 2011

Determine the autonegotiated ethernet connection speed and duplex using the mii-tool command. Running the following command as superuser with no options will generate basic information about all of the ethernet interfaces on the computer: [root@server2 ~]# mii-tool

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