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lsof — List Open Files

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Edsger Wybe Dijkstra (EWD) was one of the most influential members of
computing science’s founding generation and he honored by ACM Turing
Award. URL: http://www.cs.utexas.edu/users/EWD/

One Day One Command
===================

lsof — LiSt Open Files.

Summary:

lsof lists all open files belonging to all active processes. An open
file may be a regular file, a Dir, a special file, an executing text
reference, a library, a stream or a network file (Internet socket, NFS
file or UNIX domain socket).          

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strace — Trace System Calls and Signals

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RMS (Richard M Stallman) Founder of GNU Projects and Free Software
Foundation (FSF). URL: http://www.stallman.org/

One Day One Command
===================

strace — Trace System Calls and Signals.

Summary:

In the simplest case strace runs the specified command until it exits.
It intercepts and records the system calls which are called by a
process and the signals which are received by a process.  The name of
each system call, its arguments and its return value are printed.
strace is a useful diagnostic, instructional, and debugging tool.

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ltrace — Library call TRACEr

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Linux From Scratch (LFS) is a project that provides you with
step-by-step instructions for building your own GNU/Linux OS
from source code. URL: http://www.linuxfromscratch.org/

One Day One Command
===================

ltrace — Library call TRACEr

Summary:

ltrace is a program that simply runs the specified command until it
exits and intercepts & records the library/system calls, which are
called by the executed process, and the signals, which are received by
that process. It can used study the internal flow of a program.

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gcc — GNU C Compiler

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Linux From Scratch (LFS) is a project that provides you with
step-by-step instructions for building your own GNU/Linux OS
from source code. URL: http://www.linuxfromscratch.org/

One Day One Command
===================

gcc — GNU C Compiler

Summary:

Several versions of the compiler (C, C++, Objective-C, Ada, Fortran,
and Java) are integrated; this is why we use the name “GNU Compiler
Collection”. GCC can compile programs written in any of these above
languages.

This C program is used in the examples.

#define DISPLAY “Hello Worldn”
main()
{
 #ifdef MACRO
   printf(DISPLAY);
 #else
   printf(“No Macron”);
 #endif
}

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dd — Convert and Copy Files

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The Free Software Foundations are proud to announce the creation of
the global “GPL Version 3 Development and Publicity Project”. This
activity is supported by no. of organizations.
URL: http://www.gnu.org/

One Day One Command
===================

dd — Convert and copy a file.

Summary:

‘dd’ copies and optionally converts data with changeable I/O block
size. Reads are issued to the input file or device for the size of
the input buffer and writes are issued for the size of the output
buffer. This allows I/O requests to be tailored to the requirements of
a task. Output to standard error reports the number of full and short
blocks read and written.

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Crontab Tutorial

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Crontab Tutorial * What is a Crontab? A cron is a utility that allows tasks to automatically run in the background at regular intervals by use of the cron daemon. Crontab (CRON TABle) is a file which contains the schedule of cron entries to be run and at what times they are to be run.This … Read more

whatis — Search the whatis database for complete words

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Mr Vijay Kumar B released Beta version of XPDF with GGI (General
Graphics Interface) Front end. Use of GGI will give a reliable,
stable and fast graphics system that works everywhere.
URL: http://www.bravegnu.org/xpdf/  (Developers Needed)

One Day One Command
===================

whatis — Search the whatis database for complete words.

Summary:

Whatis DB contains the name and one line description about all
commands man pages. whatis searches for keywords and displays the
result(s) on the standard output. Only complete word matches are
displayed.

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renice — Alter priority of running processes.

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Mr Vijay Kumar released the Beta version of XPDF with GGI (General
Graphics Interface) Front end. Use of GGI will give the reliable,
stable and fast graphics system that works everywhere.
URL: http://www.bravegnu.org/xpdf/  (Volunteers Needed)

One Day One Command
===================

renice — Alter priority of running processes.

Summary:

GNU/Linux is a multi-user and multi-tasking OS. So many processes will
be running with some scheduling policy like Round Rabin, FIFO etc..
High priority process will get more CPU Time.

Renice is used to alters the scheduling priority of one or more
running processes. Priority range goes from -20 (highest priority)
to 19 (lowest priority).

       

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E-Mail Security & GnuPG

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E-Mail Security & GnuPG E-Mail is the fastest mail serve in today’s world. All we are now very much dependent upon this service but how much care do we take to protect it from tapping? An e-mail easily can be tapped by a third party when the mail is in transit. In that way, your … Read more

which — Shows the location of (shell) commands.

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Want to know the Linux News On Internet Time? Check Linux Today
News Site. URL: http://linuxtoday.com/

One Day One Command
===================

which — Shows the location of (shell) commands.

Summary:

which will search for the given command in the PATH and prints the
full path of the executables that would have been executed when this
command had been entered at the shell prompt.

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