5 Great Linux Disk IO monitoring tools

5 Great Linux Disk IO monitoring tools

5 Great Linux Disk IO monitoring tools Below you see my favorite best 5 Linux Disk IO Monitoring Tools.   IOTOP iotop Linux is a simple top-like disk I/O monitor tool. iotop command watches I/O usage information output by the… Continue Reading

How To Reset Openfire Admin Password

reset openfire admin password

How To Reset Openfire Admin Password If you forgot Openfire admin password this tutorial will help you step by step Reset Openfire admin password from Linux command line.   1. Stop Openfire Stop Openfire service by command: # service openfire… Continue Reading

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