Uname command with examples
1. uname command The uname command prints information about the system. uname is a portmanteau word made up from “unix” and “name”. uname can be… Read More »Uname command with examples
Unix
Syslog
1.0 Syslog Syslog is a protocol for conveying event notification messages. Syslog was first developed by Eric Allman for logging as a part of the… Read More »Syslog
POSIX Shared Memory in Linux
1.0 Shared Memory Shared memory is the fastest method of interprocess communication (IPC) under Linux and other Unix-like systems. The system provides a shared memory… Read More »POSIX Shared Memory in Linux
POSIX Semaphores in Linux
1.0 Semaphores Semaphores are used for process and thread synchronization. Semaphores are clubbed with message queues and shared memory under the Interprocess Communication (IPC) facilities… Read More »POSIX Semaphores in Linux
Awk Tutorial
1.0 awk awk is a filter which takes the input and gives output after matching desired patterns and doing processing linked to matched patterns. awk… Read More »Awk Tutorial
Sed command in Linux
1.0 sed sed is a stream editor that accepts a list of commands and input file names. It applies the commands one by one on… Read More »Sed command in Linux
grep Command in Linux
1.0 grep grep is a program for searching a given string pattern in files. It searches the files for the pattern and prints the lines… Read More »grep Command in Linux
Trigonometric calculations with bc
bc, the basic calculator under Linux and UNIX environments, provides commands for doing arbitrary precision mathematical calculations. The syntax for basic arithmetic functions is intuitive.… Read More »Trigonometric calculations with bc
iostat
The iostat command is for getting the CPU and input-output devices' statistics for Linux and Unix systems. For example, $ iostat Linux 3.0.0-14-generic (hostname) Wednesday… Read More »iostat
top Command in Linux
The Unix top command is useful for monitoring systems continuously for processes that take more system resources like the CPU time and the memory. top… Read More »top Command in Linux