Unix-like Tips and Tricks: BASH Redirection
Bash is a POSIX shell with a number of extensions. It is the shell for the GNU operating system from the GNU Project. It can be run on most Unix-like operating systems.
In this article I'll talk about bash redirections.
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Bandwidth Monitoring Tools for FreeBSD and Linux: iftop
Bandwidth represents the capacity of the connection. The greater the capacity, the more likely that greater performance will follow, though overall performance also depends on other factors, such as latency.
iftop is a free open-source tool to measure bandwidth utilization on the network interfaces on your systems. As the name predicts, iftop is what "top" utility is for CPU usage measurement.
To install iftop in CentOS, Fedora, RHEL ( make sure you have DAG repository enabled ):
# yum install iftop
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How To Limit CPU Usage of A Process with cpulimit under Linux
In this tutorial I'll show you how you can limit the CPU usage of a process with cpulimit tool on Debian/Ubuntu Linux.
cpulimit is a program that limit the CPU Usage of a process (expressed in percentage, not in CPU Time). This is very useful to control batch jobs, when you don't want them to use to much CPU. cpulimit is able to adapt itself to the overall system load, dynamically and quickly.
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