assignment

Tanya Sharma/linux assignment 1.txt

@@ -0,0 +1,74 @@
+1.	When we add a new user using command useradd why the folder is not created inside the home directory?
+Ans.	useradd is a low level utility for adding users so it doesnot show the folder.
+
+2.	When we create a user, some hidden files are generated in the directory of the same user at that time. How is it done?
+
+Ans. 	Hidden file is a folder or file which filesystem utilities do not display by default when showing a directory listing. 
+	They are commonly used for storing user preferences or preserving the state of a utility, and are frequently created implicitly
+ 	by using various utilities. They are not a security mechanism because access is not restricted usually the intent is simply to not
+ 	clutter the display of the contents of a directory listing with files the user did not directly create.
+
+3.	Make sub directories inside a parent directory by using single mkdir command.
+Ans. 	mkdir -p A/{B,C,D,E}
+
+	The -p flag tells the mkdir command to create the main directory first if it doesn�t already exist (A, in our case). 
+	The words in the brackets are the subdirectories to be created. Each of the items in the brace expansion list 
+	is appended separately to the preceding path A.
+
+4. 	Change the Umask value for any user permanently.
+Ans.	To change the default Umask value to anything, write a 
+	new Umask value in your shell�s configuration file (~/.bashrc for Bash) or in the /etc/profile file.
+
+5. 	How to add a new user with a Unique user id (e.g 1345) & check out the unique Id of that user.
+
+Ans.	Use the -u (--uid) option to create a user with a specific UID. 
+	For example to create a new user named username with UID of 1500 you would type:
+
+
+	sudo useradd -u 1345 username
+
+	You can verify the user�s UID, using the id command:
+
+
+	id -u username
+ 1345	
+
+
+6.	 Tac vs Cat command
+Ans	Cat command is a well known Unix utility that reads files sequentially. 
+	Writing them to conventional output. The name is derived from its function for concatenating and listing the documents. 
+	Tac (that is �cat� backwards) concatenates every record to traditional output much like the cat command. 
+	However in opposite line-by means of-line, printing the last line first. 
+
+	The basic example of cat command:-
+	1. $ cat text.txt
+	The above command is to read files and display them.
+	2. $ cat text.txt text2.txt>text3.txt
+	This command can also be used to concatenate (join) multiple files into one single file using the �>� 
+	3. The cat command is also used to copy the content from one file to an other new file.
+
+	The basic example of tac command:-
+	1.$ tac text3.txt
+
+7.	How to add user without using adduser or useradd command?
+Ans	Step1 :Add an entry for the user in /etc/passwd file.
+	Step2: Add an entry for the group in /etc/group file.
+	Step3: Create the home directory for the added user.
+	Step4: Set the new user password using the passwd command.
+
+8. 	How to change the group of any folder ?
+Ans	to change the group of any folder we use *chgrp command*.
+
+
+9.	How to change the group of files and the folder with a single command?
+Ans.	Using the chgrp command 
+	chgrp [OPTIONS] GROUP FILE..
+
+
+GROUP, name of the new group
+
+FILE... name of one or more files.
+
+10.	Create a new user and at the same time you have to add that user into the group you already have?
+Ans. 	useradd -G groupname username
+

Tanya Sharma/linux assignment3.txt

@@ -0,0 +1,17 @@
+1.	create,compress and unzip the file with bzip2.
+Ans	Creating a file
+	#yes "R" >> regex.txt
+	ctrl+c
+	Compressing the file
+	#bzip2 regex.txt
+	Decompressing the file
+	#bzip2 -d regex.txt.bz2
+
+2.	Read a file and show the data on terminal using file input output redirection.
+Ans	File input output redirection symbol is  >.
+	-> to see the output
+	cat < date1.txt
+
+3. 	How to change the shell of user to "/bin/sh" at the time of adding the user? 
+Ans	To change the shell we use chsh command
+	chsh -s /bin/bash

Tanya Sharma/linux leftover assignment of 1 and 2.txt

@@ -0,0 +1,25 @@
+1.	 Tac vs Cat command
+Ans	Cat command is a well known Unix utility that reads files sequentially. 
+	Writing them to conventional output. The name is derived from its function for concatenating and listing the documents. 
+	Tac (that is �cat� backwards) concatenates every record to traditional output much like the cat command. 
+	However in opposite line-by means of-line, printing the last line first. 
+
+	The basic example of cat command:-
+	1. $ cat text.txt
+	The above command is to read files and display them.
+	2. $ cat text.txt text2.txt>text3.txt
+	This command can also be used to concatenate (join) multiple files into one single file using the �>� 
+	3. The cat command is also used to copy the content from one file to an other new file.
+
+	The basic example of tac command:-
+	1.$ tac text3.txt
+
+2.	How to add user without using adduser or useradd command?
+Ans	Step1 :Add an entry for the user in /etc/passwd file.
+	Step2: Add an entry for the group in /etc/group file.
+	Step3: Create the home directory for the added user.
+	Step4: Set the new user password using the passwd command.
+
+3. 	How to change the group of any folder ?
+Ans	to change the group of any folder we use *chgrp command*.
+

Tanya Sharma/python assignment 1.txt

@@ -0,0 +1,45 @@
+1. 	What are the different types of python compilers? what is Jpython and Cpython?
+Ans.	Different types of Python Compilers:
+
+	1)CPython.
+
+	2)Jython or Jpython.
+
+	3)IronPython.
+
+	4)ActivePython.
+
+	5)PyJS (it also is formerly known as Pyjamas).
+
+	6)Nuitka.
+
+	7)Stackless Python.
+
+	CPython
+	It is the most widely used interpreter in Python, developed in C and python, 
+	the bindings for the interpreter must be written in a foreign language other than Python.
+	CPython uses a Global Interpreter Lock (GIL) on each process thus python bytecode for 
+	a single process is executed on a single thread.CPython finds its use as many libraries are C optimized 
+	i.e. many libraries will run its processes faster in a C based code.
+	The steps of compilation are as follows:- Decoding, Tokenizing, Parsing, AST(Abstract Syntax Tree), Compiling.
+
+	 Jython or Jpython 
+	Jython is an implementation that has been designed for the seamless integration of Python code over Java virtual machine, 
+	the advantage of this integration is that it provides an opportunity for an action of a popular scripting language like python 
+	to a vast library of the Java virtual machine. Jython compiles files to .class extensions.
+	The Jython programs can inherit and run any Java class and compile the code to bytecode. Along with this Jython can be
+	used to implement any Java-based packages especially desirable for creating solutions using Servlets, Swing, SWT, 
+	and AWT packages.
+
+2.	Difference between python2 and python3.
+Ans	1. Python2 is legacy, Python3 is the future.
+	2. Python2 and Python 3 have different(sometimes incompatible) libraries.
+	3.There is better unicode support in Python3.
+	4.Python3 has improved integer version.
+	5.They have different print syntax statement.
+
+3.	Difference between ASCII and unicode.
+Ans	1.ASCII uses an 8-bit encoding while Unicode uses a variable bit encoding.
+	2.Unicode is standardized while ASCII isn�t.
+	3.Unicode represents most written languages in the world while ASCII does not.
+	4.ASCII has its equivalent within Unicode

Tanya Sharma/python assignment 2.ipynb

@@ -0,0 +1,191 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# What should be the output? ( 3 + 4 ** 6 - 9 * 10 / 2 )"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 36,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "4054.0\n"
+     ]
+    }
+   ],
+   "source": [
+    "a=( 3 + 4 ** 6 - 9 * 10 / 2 )\n",
+    "print(a)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Let say I have, some string \"hello this side regex\".Find out the count of the total vowels"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 40,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Total number of vowels:  7\n"
+     ]
+    }
+   ],
+   "source": [
+    "vowel=['a','e','i','o','u']\n",
+    "str=\"hello this side regex\"\n",
+    "count = 0\n",
+    "for alphabet in str: \n",
+    "    if alphabet in vowel: \n",
+    "            count = count + 1\n",
+    "print(\"Total number of vowels: \",count) "
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Find out the area of triangle, where you have to take value from user about the base, & the height"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 41,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "enter the base of the triangle: 5\n",
+      "enter the height of the triangle: 6\n",
+      "15.0\n"
+     ]
+    }
+   ],
+   "source": [
+    "b=float(input(\"enter the base of the triangle: \"))\n",
+    "h=float(input(\"enter the height of the triangle: \"))\n",
+    "area=(1/2)*b*h\n",
+    "print(area)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Print the calendar on the terminal.Allow the user to input the year."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 34,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Enter Year: 1998\n",
+      "                                  1998\n",
+      "\n",
+      "      January                   February                   March\n",
+      "Mo Tu We Th Fr Sa Su      Mo Tu We Th Fr Sa Su      Mo Tu We Th Fr Sa Su\n",
+      "          1  2  3  4                         1                         1\n",
+      " 5  6  7  8  9 10 11       2  3  4  5  6  7  8       2  3  4  5  6  7  8\n",
+      "12 13 14 15 16 17 18       9 10 11 12 13 14 15       9 10 11 12 13 14 15\n",
+      "19 20 21 22 23 24 25      16 17 18 19 20 21 22      16 17 18 19 20 21 22\n",
+      "26 27 28 29 30 31         23 24 25 26 27 28         23 24 25 26 27 28 29\n",
+      "                                                    30 31\n",
+      "\n",
+      "       April                      May                       June\n",
+      "Mo Tu We Th Fr Sa Su      Mo Tu We Th Fr Sa Su      Mo Tu We Th Fr Sa Su\n",
+      "       1  2  3  4  5                   1  2  3       1  2  3  4  5  6  7\n",
+      " 6  7  8  9 10 11 12       4  5  6  7  8  9 10       8  9 10 11 12 13 14\n",
+      "13 14 15 16 17 18 19      11 12 13 14 15 16 17      15 16 17 18 19 20 21\n",
+      "20 21 22 23 24 25 26      18 19 20 21 22 23 24      22 23 24 25 26 27 28\n",
+      "27 28 29 30               25 26 27 28 29 30 31      29 30\n",
+      "\n",
+      "        July                     August                  September\n",
+      "Mo Tu We Th Fr Sa Su      Mo Tu We Th Fr Sa Su      Mo Tu We Th Fr Sa Su\n",
+      "       1  2  3  4  5                      1  2          1  2  3  4  5  6\n",
+      " 6  7  8  9 10 11 12       3  4  5  6  7  8  9       7  8  9 10 11 12 13\n",
+      "13 14 15 16 17 18 19      10 11 12 13 14 15 16      14 15 16 17 18 19 20\n",
+      "20 21 22 23 24 25 26      17 18 19 20 21 22 23      21 22 23 24 25 26 27\n",
+      "27 28 29 30 31            24 25 26 27 28 29 30      28 29 30\n",
+      "                          31\n",
+      "\n",
+      "      October                   November                  December\n",
+      "Mo Tu We Th Fr Sa Su      Mo Tu We Th Fr Sa Su      Mo Tu We Th Fr Sa Su\n",
+      "          1  2  3  4                         1          1  2  3  4  5  6\n",
+      " 5  6  7  8  9 10 11       2  3  4  5  6  7  8       7  8  9 10 11 12 13\n",
+      "12 13 14 15 16 17 18       9 10 11 12 13 14 15      14 15 16 17 18 19 20\n",
+      "19 20 21 22 23 24 25      16 17 18 19 20 21 22      21 22 23 24 25 26 27\n",
+      "26 27 28 29 30 31         23 24 25 26 27 28 29      28 29 30 31\n",
+      "                          30\n",
+      "\n"
+     ]
+    }
+   ],
+   "source": [
+    "import calendar\n",
+    "year = int(input(\"Enter Year: \"))\n",
+    "#month = int(input(\"Enter Month: \"))\n",
+    "print(calendar.calendar(year)) "
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "collapsed": true
+   },
+   "outputs": [],
+   "source": []
+  }
+ ],
+ "metadata": {
+  "anaconda-cloud": {},
+  "kernelspec": {
+   "display_name": "Python [default]",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.5.2"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 1
+}