I feel alot of joy while exploring linux command-line tools, saidar is a very simple monitor tool for linux that I recommend to every system administrator. It does not offer many features and options as other tools avaiable to sys [...]
MONITORING
Linux iftop - Listen Network traffic (interface) & Bandwidth (pair of hosts)
Today the need of bandwidth is growing from time to time. Movies, streaming, online games are some of the applications that consumes big bandwidth. System administrator should manage and monitor bandwidth that comes to and go from their server. There [...]
dstat - Monitor Processor, Memory, Network Performance on Linux
One of system administrator main job is to monitor server performance, such as processor, memory, network, and system utilization. The servers should always in its best performance and should be available when needed. To monitor all of those components in [...]
How use Nmon and "Java Nmon Analyzer" for Monitor Linux Performance
Nmon is a resource monitoring tools which can monitor CPU, Memory, Disks, Network and even Filesystem on RHEL / Ubuntu systems. Java Nmon Analyzer is a tool that uses the nmon output as an input. It will graph the nmon [...]
Linux vnstat - A Console Network Traffic Monitoring Tool
VnStat is a console-based network traffic monitor for Linux and BSD that keeps a log of network traffic for the selected interface(s). It uses the network interface statistics provided by the kernel as information source. This means that vnStat won't [...]
What is ntopng & How to Install ntopng in Linux
Nowdays computers are connected between each other. From the small area such as your home Local Area Network (LAN) until the the biggest one which we call - Internet. When you are managing a network computer, you are managing one [...]
How to Parse Squid Proxy Access.log File Using Squid Analyzer
Squid is one of the most popular proxy software in Linux world. It’s powerful, it has a lot of features and of course, it’s free. Squid has been used by ISP’s since the early 1990 to provide faster download speeds [...]
How to Setup a Centralized Syslog Server in Red Hat Linux
Server logs become essential troubleshooting key points for system administrators when an issue occurs. By default, all the logs on RHEL based servers are stored in /var/log directory. The syslog daemon can be configured to send logs to a remote [...]
Check Memory Usage of Process with Linux Top Command
Generally, we look at the memory usage using the free command that provides us the total physical memory and used memory out of total memory. But top command is more useful to check memory usage in Linux. The free command [...]
How to Check Memory Usage of Process with Linux pmap Command
The Linux pmap command displays the memory usage map of a process or multiple processes. Pmap reports information about the address space or memory usage map of a process. Pmap is actually a Sun OS command and Linux supports only very [...]
Check Linux Process Memory Usage with PS Command
The ps (process status) command is used to provide information about the currently running processes, including their process identification numbers (PIDs), USER, TTY, %CPU, %MEM and command. Every process is assigned a unique ID the system that is called PID. [...]
Iotop - How to Monitor Disk IO in Linux
Iotop tool is a free open source free tool that monitor Disk Input/Output (IO) usage in Linux. Its helps system administrator to find a specific process that consumes more disk usage and helps in performance analysis. Iotop tool is supported [...]
Sar Command in Linux with Examples
Sar command is used to produce statistical reports on a variety of resources including CPU usage, memory utilization, I/O devices consumption, network monitor, swap, and load averages. SAR stands for System Activity Reporter, very useful tools for any Linux administrator [...]
PRM - Process Resource Monitor for Linux
PRM is a CPU, memory, processes and run (elapsed) time resource monitor for Linux systems. It does this by monitoring the process table on a given system and matches process id's with set resource limits in the configuration file or per-process [...]