IT Systems, Networks, Security and Education
This is post 5 of 5 in the series “Introduction to Python” Go to Chapter 4 of A Smarter Way. 1. Assigning a number value to a variable: my_number = 4 2. Assigning a number by doing math: another_number = 2 + 2 3. Doing math directly with variables: my_sum = my_number + another_number Go …
#!/usr/bin/python # Connects to a public ftp server, downloads a file import pexpect import sys child = pexpect.spawn(‘ftp ftp.ubuntu.com’) child.logfile = sys.stdout child.expect(‘Name’) child.sendline(‘anonymous’) child.expect(‘Password’) child.sendline(‘anonymous’) child.expect(‘ftp>’) child.sendline(‘cd /ubuntu/dists/xenial’) child.expect(‘ftp>’) child.sendline(‘get InRelease’) child.expect(‘ftp>’) child.sendline(‘quit’)
#!/bin/bash # Runs ftpTest.py to do pexpect session, checks if the file downloaded successfully, cleans up when done cleanup(){ rm -f — InRelease } ftpTest.py if [[ -r InRelease ]] ;then echo “Transfer succeeded” cleanup exit 0 fi echo “Failed to transfer” cleanup exit 10
This is post 11 of 11 in the series “The Linux Command Line” The first principle of file creation is that when you, as a specific user, create a file, it will be owned by you, and your default group will have some default permissions set on that file. Remember the User – Group – …
Continue reading “Linux: Creating and Deleting Directories and Files”
This is post 4 of 5 in the series “Introduction to Python” Let’s start out on this highly detailed page on handling lists: http://introtopython.org/lists_tuples.html Yes, this is a beast of a topic, and yes, you’ll be using these functions a lot. Note two things at the bottom of this page. First, see the heading …
This is post 3 of 5 in the series “Introduction to Python” We’re going to start with Chapter 1 of A Smarter Way. 1. Open a Linux terminal. Then run the command: python 2. Simple Print Output: “Hello World” print(“Hello, World!”) Older versions of Python (most often the classic 2.7) can use slightly different syntax: …
Continue reading “Python: Hello World and Variables, Strings and Numbers”
This is post 2 of 5 in the series “Introduction to Python” Which Text Editor Should You Choose? This is the kind of question that’ll get you into a war on Reddit. Do some quiet research before asking online. If you’re comfortable using vi or vim, they’re perfectly fine. Beginners don’t usually start with vi …
This is post 1 of 5 in the series “Introduction to Python” Book: A Smarter Way to Learn Python, Mark Myers Lessons and Curricula I recommend studying Python from multiple sources: our book, online training and videos. Our Book We’ll cover lessons in A Smarter Way, and as we cover chapters we’ll look at the …
This is post 10 of 11 in the series “The Linux Command Line” The ls Command ls = List of objects in the current working directory. Typing: ls will bring up a list of files and subdirectories. It may also be flagged to provide some different ways of looking at the list of files, such …
Continue reading “Listing Files and Going Deep Into Filesystems”
This is post 9 of 11 in the series “The Linux Command Line” Both sudo and su are highly dangerous. The sudo command is used to run a following command as the super-user. Think “super-user do.” It lets regular users do rootly thing, like: sudo cat /etc/shadow You’ll be prompted for a password: Your Password. …