Software resources for all
SoftPrayog provides information regarding software conforming to the Free and Open Source Software (FOSS) philosophy. You will find here articles on software engineering, tutorials and troubleshooting information regarding commands belonging to GNU/Linux based systems. The objective of SoftPrayog is to help in learning of the Linux operating system, its commands and provide software development resources.
What's new
-
The iptables command under Linux helps us in establishing and configuring a firewall by defining rules for packet filtering. iptables also helps in configuring the Network Address Translation (NAT) table.
-
As we work on multiple computers, we need to transfer the work done from one computer to another. Doing this manually is prone to error. This synchronization can be automated using Unison. Unison provides bidirectional synchronization between two computers.
-
The netstat command in Linux provides network statistics and information about the networking subsystem. It gives information about network connections, routing tables and network interface statistics.
-
Quite often, we wish to connect two computers back to back using an Ethernet LAN cable. It may be because we wish to transfer files between the two computers or because one of these has the Internet access and we wish to have one more access point to the Net. The step by step instructions on how to do this are given here.
-
The Routing Table contains the routes for forwarding the IP packets on each network interface. Commands to view and modify the Routing Table are explained with examples.
Featured Posts
-
ps command usage examples in Linux
The ps command is for the process status. ps gives the status of currently executing processes on a Linux or Unix system. There are multiple options for the ps command that help in getting the process information of interest.
-
Synchronizing Files Between Multiple Computers Using Unison
As we work on multiple computers, we need to transfer the work done from one computer to another. Doing this manually is prone to error. This synchronization can be automated using Unison. Unison provides bidirectional synchronization between two computers.
-
top Command in Linux
The top command is useful for monitoring a Linux or Unix system continuously for processes that take more system resources like the CPU time and the memory. top periodically updates the display showing the high resource consuming processes at the top.
-
Alarm, sleep and High Resolution Timers
Software systems often need to act based on time. The accuracy and precision of time maintained by a system is important. Alarms, sleep and high resolution timers provide a framework for application programs to carry out time-critical tasks.
-
Linux process execution time
As a process executes, it takes up the CPU time which is also called the execution time or the processor time. The times system call and the clock library function can be used by the process to find its execution time.
-
sar in Linux
The sar command under Linux and Unix systems gives the system activity reports. The sar command gives statistics regarding the CPU, I/O, paging, devices, memory, swap space, network, run queue length and load average, interrupts and power management.
-
Load Average
Load average, reported by commands like top, uptime and w, is explained. Load average is an indication of whether the system resources (mainly the CPU) are adequately available for the processes (system load) that are running, runnable or in uninterruptible sleep states during the previous n minutes.
-
rsync
rsync is used for synchronizing the source files with the corresponding files at the destination. The source and destination may be on the same host, in which case rsync becomes an advanced copy command. Or, the destination may be a networked remote host. rsync uses the delta encoding technique for copying files; for files existing at the destination, only the differences from the source are transferred.
