Yum Update Exclude Package in CentOS / RHEL

yum update exclude package

How To Exclude Specific Packages from Yum Update in CentOS / RHEL   Below I will show some examples how to exclude specific packages updates from manual yum update in Red Hat or CentOS. Yum is the primary tool for… Continue Reading

5 Great Commands to Monitor Network Bandwidth

Commands to Monitor Network Bandwidth

5 Great Commands to Monitor Network Bandwidth on Linux Server   Linux network traffic monitoring is one of the main parts of Linux troubleshooting. And can be done by many network monitoring utilities. In this article we will discover 5… Continue Reading

Zimbra. Postfix_rbl_override.lmdb: No such file or directory

Zimbra. Postfix_rbl_override.lmdb: No such file or directory How to fix Zimbra mail server error: lmdb:/opt/zimbra/conf/postfix_rbl_override is unavailable. open database /opt/zimbra/conf/postfix_rbl_override.lmdb: No such file or directory. To build missing postfix_rbl_override.lmdb file run postmap and zmprov. # /opt/zimbra/common/sbin/postmap /opt/zimbra/conf/postfix_rbl_override # /opt/zimbra/bin/zmprov mcf… Continue Reading

Useful Netcat Examples and Tutorial

Useful Netcat Examples

Useful Netcat Examples In this netcat tutorial you can see useful netcat examples to help you use this powerful tool. Netcat (nc – in short) can be called “Swiss army of knife” in Linux network terminal utilities. Netcat can be… Continue Reading

How To Test Internet Speed On VPS

Linux VPS upload download speed test

How To Test Internet Speed On Linux VPS To get internet speed from command line Linux VPS we can use Python utility from SPEEDTEST – Speedtest-cli. Speedtest-cli is a script developed in Python programming language. Lets download SPEEDTEST utility from… Continue Reading