Per chi incomincia addentrarsi nel magico mondo dei comandi da terminale la vita può essere dura. In rete esistono diverse guide, ma la “Linux Bash Shell Cheat Sheet for Beginners” di Raphael è qualcosa che i principianti dovrebbero tenere a portata di mano. La segnaliamo un po’ perchè è molto semplice e chiara, e un po’ perchè è stata scritta da un sedicenne canadese. Personalmente è una cosa che mi fa piacere, perchè dimostra che anche i giovanissimi si accostano a linux nel modo migliore, ovvero “imparo e a mia volta diffondo”.
P2Cinfotech is one of the leading, Online IT Training facilities and Job Consultant, spread all over the world. We have successfully conducted online classes on various Software Technologies that are currently in Demand. To name a few, we provide quality online training for QA, QTP, Manual Testing, HP LoadRunner, BA, Java Technologies.
Unique Features of P2Cinfotech:
1. All online software Training Batches will Be handled by Real time working Professionals only.
2. Live online training like Real time face to face, Instructor ? student interaction.
3. Good online training virtual class room environment.
4. Special Exercises and Assignments to make you self-confident on your course subject.
5. Interactive Sessions to update students with latest Developments on the particular course.
6. Flexible Batch Timings and proper timetable.
7. Affordable, decent and Flexible fee structure.
8. Extended Technical assistance even after completion of the course.
9. 100% Job Assistance and Guidance.
Courses What we cover:
Quality Assurance
Business Analsis
QTp
JAVA
Apps Devlepoment Training
Register for Free DEMO:
www.p2cinfotech.com p2cinfotech@gmail.com +1-732-546-3607 (USA)
Summary of UNIX commands used in the BTI Plant Bioinformatics Course in 2014. It includes a description of these common commands and some useful options.
Per chi incomincia addentrarsi nel magico mondo dei comandi da terminale la vita può essere dura. In rete esistono diverse guide, ma la “Linux Bash Shell Cheat Sheet for Beginners” di Raphael è qualcosa che i principianti dovrebbero tenere a portata di mano. La segnaliamo un po’ perchè è molto semplice e chiara, e un po’ perchè è stata scritta da un sedicenne canadese. Personalmente è una cosa che mi fa piacere, perchè dimostra che anche i giovanissimi si accostano a linux nel modo migliore, ovvero “imparo e a mia volta diffondo”.
P2Cinfotech is one of the leading, Online IT Training facilities and Job Consultant, spread all over the world. We have successfully conducted online classes on various Software Technologies that are currently in Demand. To name a few, we provide quality online training for QA, QTP, Manual Testing, HP LoadRunner, BA, Java Technologies.
Unique Features of P2Cinfotech:
1. All online software Training Batches will Be handled by Real time working Professionals only.
2. Live online training like Real time face to face, Instructor ? student interaction.
3. Good online training virtual class room environment.
4. Special Exercises and Assignments to make you self-confident on your course subject.
5. Interactive Sessions to update students with latest Developments on the particular course.
6. Flexible Batch Timings and proper timetable.
7. Affordable, decent and Flexible fee structure.
8. Extended Technical assistance even after completion of the course.
9. 100% Job Assistance and Guidance.
Courses What we cover:
Quality Assurance
Business Analsis
QTp
JAVA
Apps Devlepoment Training
Register for Free DEMO:
www.p2cinfotech.com p2cinfotech@gmail.com +1-732-546-3607 (USA)
Summary of UNIX commands used in the BTI Plant Bioinformatics Course in 2014. It includes a description of these common commands and some useful options.
Slides from the Introduction to UNIX Command-Lines class from the BTI Plant Bioinformatics course 2014. This is a course teach by the Sol Genomics Network researchers at the Boyce Thompson Institute.
Course 102: Lecture 3: Basic Concepts And Commands Ahmed El-Arabawy
This lecture covers the basic file management commands
Check the other Lectures and courses in
http://Linux4EnbeddedSystems.com
or Follow our Facebook Group at
- Facebook: @LinuxforEmbeddedSystems
Lecturer Profile:
- https://www.linkedin.com/in/ahmedelarabawy
BITS: Introduction to Linux - Text manipulation tools for bioinformaticsBITS
This slide is part of the BITS training session: "Introduction to linux for life sciences."
See http://www.bits.vib.be/index.php?option=com_content&view=article&id=17203890%3Abioperl-additional-material&catid=84&Itemid=284
Slides from the Introduction to UNIX Command-Lines class from the BTI Plant Bioinformatics course 2014. This is a course teach by the Sol Genomics Network researchers at the Boyce Thompson Institute.
Course 102: Lecture 3: Basic Concepts And Commands Ahmed El-Arabawy
This lecture covers the basic file management commands
Check the other Lectures and courses in
http://Linux4EnbeddedSystems.com
or Follow our Facebook Group at
- Facebook: @LinuxforEmbeddedSystems
Lecturer Profile:
- https://www.linkedin.com/in/ahmedelarabawy
BITS: Introduction to Linux - Text manipulation tools for bioinformaticsBITS
This slide is part of the BITS training session: "Introduction to linux for life sciences."
See http://www.bits.vib.be/index.php?option=com_content&view=article&id=17203890%3Abioperl-additional-material&catid=84&Itemid=284
cp command in Linux with examples
cp stands for copy. This command is used to copy files or group of files or directory. It creates an exact image of a file on a disk with different file name. cp command require at least two filenames in its arguments.
Hashing notes data structures (HASHING AND HASH FUNCTIONS)Kuntal Bhowmick
A Hash table is a data structure used for storing and retrieving data very quickly. Insertion of data in the hash table is based on the key value. Hence every entry in the hash table is associated with some key.
HASHING AND HASH FUNCTIONS, HASH TABLE REPRESENTATION, HASH FUNCTION, TYPES OF HASH FUNCTIONS, COLLISION, COLLISION RESOLUTION, CHAINING, OPEN ADDRESSING – LINEAR PROBING, QUADRATIC PROBING, DOUBLE HASHING
introduction to E-commerce, Electronic commerce, EDI, CS802E,
e-commerce ,edi ,electronic data interchange ,traditional commerce ,buyer and seller ,origin of e-commerce ,business process ,impact of e-commerce ,value chain analysis ,company value chain ,case studies on e-commerce ,advantages of e-commerce ,disadvantages of e-commerce
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
Hierarchical Digital Twin of a Naval Power SystemKerry Sado
A hierarchical digital twin of a Naval DC power system has been developed and experimentally verified. Similar to other state-of-the-art digital twins, this technology creates a digital replica of the physical system executed in real-time or faster, which can modify hardware controls. However, its advantage stems from distributing computational efforts by utilizing a hierarchical structure composed of lower-level digital twin blocks and a higher-level system digital twin. Each digital twin block is associated with a physical subsystem of the hardware and communicates with a singular system digital twin, which creates a system-level response. By extracting information from each level of the hierarchy, power system controls of the hardware were reconfigured autonomously. This hierarchical digital twin development offers several advantages over other digital twins, particularly in the field of naval power systems. The hierarchical structure allows for greater computational efficiency and scalability while the ability to autonomously reconfigure hardware controls offers increased flexibility and responsiveness. The hierarchical decomposition and models utilized were well aligned with the physical twin, as indicated by the maximum deviations between the developed digital twin hierarchy and the hardware.
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
Explore the innovative world of trenchless pipe repair with our comprehensive guide, "The Benefits and Techniques of Trenchless Pipe Repair." This document delves into the modern methods of repairing underground pipes without the need for extensive excavation, highlighting the numerous advantages and the latest techniques used in the industry.
Learn about the cost savings, reduced environmental impact, and minimal disruption associated with trenchless technology. Discover detailed explanations of popular techniques such as pipe bursting, cured-in-place pipe (CIPP) lining, and directional drilling. Understand how these methods can be applied to various types of infrastructure, from residential plumbing to large-scale municipal systems.
Ideal for homeowners, contractors, engineers, and anyone interested in modern plumbing solutions, this guide provides valuable insights into why trenchless pipe repair is becoming the preferred choice for pipe rehabilitation. Stay informed about the latest advancements and best practices in the field.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
1. 1
Basic Shell Programs (Assignment - 1) Solution Manual
a.Listing files and directories.
ls command is used to show all the files and directories.
b. Showing, creating and concatenating files.
Cat command: $ cat info.txt --------- displays the contents of the file info.txt
$ cat >data.txt ----------------------for creating files, after entering some text data in the file, press
ctrl+d(it denotes the EOF character)
$ cat info.txt data.txt >all_data.txt-------------------the contents of the two file info.txt and data.txt are
stored in the third file all_data.txt(if all_data.txt contains something then it will be overwritten). If
we want to append data in the third file all_data.txt then we have use
$ cat info.txt data.txt >>all_data.txt
c. Coping files, Renaming files and deleting files.
cp: copying files
The cp command is used to copy files, create duplicate copy of ordinary files in another name.
$ cp srcfile desfile [example: $ cp delta1.txt delta2.txt--------- this makes a copy of the file delta1.txt
in delta2.txt, if a file by the destination filename already exists then it sis overwritten with the
contents of the source file without any warning. We can use an option in the last mentioned
command that will copy interactively prompt the user before overwriting, $ cp -i delta1.txt
delta2.txt.
mv:renaming files
The mv(move) command changes the name of the file.Basically, using the mv command, the file is
removed from its current location and is copied to another location. $ mv oldname newname------
this command moves or renames the file oldname to newname. Example: $ mv delta_force.txt
Gamma_dyne.txt---- renames the file delta_force.txt to Gamma_dyne.txt
rm: Removing files
This command removes one or more ordinary files from a directory. The file is removed by deleting
its pointer in the appropriate directory. In this way the link between that filename and the physical
file is broken and hence the file is no longer accessed.
Example: $ rm remarks.txt ----- this command deletes the file remarks.txt.
$ rm –i programs.doc ----- this command prompts us for confirmation before removing the file. The
prompt is generally: rm: remove programs.doc (yes/no)?---- to delete the file, we have type y
followed by the enter key(n in case we do not want to delete the file).
d. Making directories ,changing directories, Removing directories.
mkdir: Making directories
The mkdir command is used to create one or more directories.
Example: $ mkdir courses -----this command creates a directory by name courses under the current
directory.
$ mkdir courses faculty placement ----- this creates 3 directories by names courses, faculty and
placement. (Note:-If the directory name already exists, the mkdir command aborts and does not
overwrite the the existing directory.For example if we give
$ mkdir courses---- since a directory with the name courses already exists, this command will
generate an error: mkdir: can’t make directory courses.)
The option –p stands for parent and is used for creating a parent directory in the given path. For
example:
2. 2
$ mkdir –p kgec/dept/cse ---- this command creates a directory; kgec within which a sub-directory:
dept and under that a sub-diectory: cse. There are several situations in which the directory is not
created and mkdir aborts with the following error:
mkdir: unable to make directory.
The reasons are : 1. A directory with the same name already exists. 2. An ordinary file by the same
name already exists in the current directory. 3. The user doesn’t have read-write permission to create
files and directories in the current directory.
cd:changing directories
We use the cd comma nd to change to any directory in the current file-system.
$ cd pathname
Here, pathname is either an absolute or relative path name for the desired target directory. Example:
$ cd /home/kgec/cse ----- this command takes us to the directory cse(that is assumed to exists in the
current directory). When we directly give the directory name(without using ‘/’ as prefix), it means
that it is a relative path(i.e., a path related to the current directory). The aforementioned path is an
absolute path.
$ cd .. ----------- this command takes us to the parent directory. (Note: .. refers to the parent
directory).
We can reach to our home directory from any other directory by simply typing the cd command
without any argument. We don’t specify our home directory as an argument, because our shell
always knows that name of our home directory.
rmdir: removing directories
This command is used to remove a directory.
$ rmdir [-p] pathname --- here the –p is used to remove the parent directory if it is empty. (NOTE:
the rmdir command cannt remove a directory until it is empty.) Example: $ rmdir cse ----- to remove
the directory cse(but if the cse directory is not empty then the following error is displayed: rmdir:
cse: Directory not empty).
We can delete more than one directory by using the following single command.
$ rmdir cse ece it ----------- it deletes the 3 directories if those are empty. To delete directory
chain(/directory_1/directory_2/directory_3/directory_4) we can use the –p option. For example:
rmdir –p /directory_1/directory_2/directory_3/directory_4 ----- it deletes all the 4 directories, if they
are empty.
Remember, we cannot use rmdir command to remove our current working directory. If we wish to
remove our working directory, we have to first come out of it.
e. Make the following directory tree:-
KGEC
|--------------------|-------------------------|----------------------|----------------------|
CSE IT ECE ME EE
|
|----------First_Year
|----------Second_Year
|----------Third_Year
|----------Fourth_Year
The following commands are used to create the above directory tree.
3. 3
1. Write a Shell script that will display the date, time, username and current directory.
Solution:
To write the script use vi editor: vi display.sh
(NOTE: Shell script files ends with .sh extensions, here display is the file name.)
# This script displays the date, time, username and current directory.
echo "Date and time is:"
date
echo
echo "Your username is: `whoami`"
echo "Your current directory is: `pwd`"
The first two lines beginning with a hash (#) are comments and are not interpreted by the shell. Use
comments to document your shell script; you will be surprised how easy it is to forget what your own
programs do!
Echo command is used to print something on the screen. The backquotes (`) around the command whoami
illustrate the use of command substitution.
To execute: $ sh display.sh
2. Write a Shell script that will display the current working shell.
Solution:
# To display the current working Shell
echo "Hello!!!"
echo "your current working shell is: `echo $SHELL`"
3. Write a Shell script that will display information regarding the users who are logged in along with their
column headings.
Solution:
4. Write a Shell script that will take some command line arguments and displays the name of the shell
script file, total number of arguments and the value of those arguments.
Solution:
# To the name of the shell script file, total number of arguments and the
# value of those arguments
4. 4
echo "Name of the shell file is : `echo $0`"
echo "Total number of command line arguments passed : `echo $#`"
echo "Arguments are : `echo $*`"
5. Write a Shell script that will take a name as command line arguments and displays the following: Input:
sh program_6.sh Anirban
Output: Hello Anirban! Welcome to UNIX.
Solution:
6. Write a simple shell script myscript.sh that takes a path of a directory as a command line argument and
list all files and folders inside the given directory.
Run the script as: sh myscript.sh /cse/sb2/os_course/week_4/docs
Solution:
# Takes a directory path input and display its contents
printf "Entered directory: %sn " $1
echo "Contents of the directory:"
echo “====================================================”
dir $1
echo “====================================================”
7. Write a Shell script that will take two numbers as command line arguments and displays their sum,
difference, product and division.
Solution:
# take two numbers as command line arguments and
# displays their sum,difference,product & division(don’t give 2nd
argument as ZERO)
sum=`expr $1 + $2`
printf "%s + %s = %sn" $1 $2 $sum
diff=`expr $1 - $2`
printf "%s - %s = %sn" $1 $2 $diff
prod=`expr $1 * $2`
printf "%s * %s = %sn" $1 $2 $prod
div=`expr $1 $2`
printf "%s %s = %sn" $1 $2 $div
8. Write a Shell script that will display the shell’s PID.
Solution:
# Displays the PID of Shell
echo PID of shell `echo $$`
9. Write a Shell script that will display the exit status of the last program to exit (generally programs return
a 0 upon success ).
Solution:
# Displays the Exit status of last program executed in shell
echo Exit status of last program `echo $?`
10. Write a Shell script that will display the current username.
Solution:
# Displays the current username
echo Current Username:`echo $USERNAME`
# YOU CAN ALSO USE: echo $LOGNAME
11. Write a Shell script that will take username as argument and displays whether he/she is logged in or not.
Solution:
if [ "$LOGNAME" = $1 ]
then
5. 5
printf "%s is logged in" $1
else
printf "%s is not currently logged in." $1
fi
NOTE: You can think of the [] operator as a form of the test command(you can also
use test "$LOGNAME" = $1 ). But, one very important note -- there must be a space
to the inside of each of the brackets. This is easy to forget or mistype. But, it
is quite critical.
12. Modify the program 5 by using a switch-case that will take arguments in the following form:
sh program_10.sh 2 + 3 Result: 5
sh program_10.sh 10 - 2 Result: 8
sh program_10.sh 10 / 2 Result: 5
sh program_10.sh 2 * 3 Result: 6
sh program_10.sh 2 # 3 Unknown Operation
Solution:
case "$2"
in
"+") ans=`expr $1 + $3`
printf "%d %s %d = %dn" $1 $2 $3 $ans
;;
"-") ans=`expr $1 - $3`
printf "%d %s %d = %dn" $1 $2 $3 $ans
;;
"*") ans=`expr "$1 * $3"`
printf "%d %s %d = %dn" $1 $2 $3 $ans
;;
"/") ans=`expr $1 / $3`
printf "%d %s %d = %dn" $1 $2 $3 $ans
;;
# Notice this: the default case is a simple *
*) printf "Unknown Operationn"
;;
esac
13. Write a shell script using switch case that displays the week day(MONDAY as 1) taking only an integer
as input(1 to 7).
Example: sh program_11.sh 2
Output: Day is TUESDAY
Solution:
case "$1"
in
"1") printf "Day is MONDAYn"
;;
"2") printf "Day is TUESDAYn"
;;
"3") printf "Day is WEDNESDAYn"
;;
"4") printf "Day is THRUSDAYn"
;;
"5") printf "Day is FRIDAYn"
;;
"6") printf "Day is SATURDAYn"
;;
"7") printf "Day is SUNDAYn"
;;
*) printf "INVALID DAY NUMBER.ENTER BETWEEN 1-7"
;;
esac