134 lines
4.5 KiB
Bash
134 lines
4.5 KiB
Bash
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#!/bin/bash
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#/-------------------------------------------------------------------------------------------------------
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#
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# @version 1.0.0
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# @build 28th Sept, 2020
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# @package SDEV-415-81: Linux/ Unix Programming I - Fall 2020 (2020FA)
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# @sub-package Week 4: Assignment - Directory Structure
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# @author Llewellyn van der Merwe <https://github.com/Llewellynvdm>
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# @copyright Copyright (C) 2020. All Rights Reserved
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# @license GNU/GPL Version 2 or later - http://www.gnu.org/licenses/gpl-2.0.html
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#
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#/--------------------------------------------------------------------------------------------------------
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# 1. Create a directory structure for the work you do in this class. The directory structure should
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# include a top-level directory (located in your home directory) named “Linux Programming I”.
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# You then need to create sub-directories inside this directory for each week.
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# (week1, week2, all the way up to week15).
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# Lastly, create Assignment directories in each “weekN” directory.
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# You will need to use the mkdir and cd commands to do this.
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# You should also use the ls command to demonstrate the creation of the directory structure.
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echo "Create Working Directories"
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DIR="/home/llewellyn/Linux Programming I"
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if [ ! -d "$DIR" ]
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then
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mkdir -p "$DIR"
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fi
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# now create the first 7 weeks directories
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for w in {1..7};
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do
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WEEK="${DIR}/1_Week${w}_1"
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echo "Creating $WEEK"
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if [ ! -d "$WEEK" ]
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then
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mkdir -p "$WEEK"
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fi
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done
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# now create the last 7/8 weeks directories
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for w in {8..15};
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do
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WEEK="${DIR}/2_Week${w}_1"
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echo "Creating $WEEK"
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if [ ! -d "${DIR}/2_Week${w}_1" ]
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then
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mkdir -p "${DIR}/2_Week${w}_1"
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fi
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done
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# 2. Perform the following
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echo "Change your prompt variable to display the current working directory (pwd)"
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echo "" >> /home/llewellyn/.bashrc
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echo "# Set SIMPLE (pwd) prompt" >> /home/llewellyn/.bashrc
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echo "PS1='\${PWD##*/}/ '" >> /home/llewellyn/.bashrc
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echo "Set the history to be 100 commands"
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echo "" >> /home/llewellyn/.profile
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echo "# Keep only 100 History Commands" >> /home/llewellyn/.profile
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echo "export HISTSIZE=100" >> /home/llewellyn/.profile
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echo "Change to working directory ${PWD}"
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cd "${PWD}"
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echo "Set an alias to allow typing h to list the history of commands."
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echo "" >> /home/llewellyn/.bash_aliases
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echo "# To list history of commands" >> /home/llewellyn/.bash_aliases
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echo "alias h='!!'" >> /home/llewellyn/.bash_aliases
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echo "Set an alias for listlong to be ls –latr."
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echo "" >> /home/llewellyn/.bash_aliases
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echo "# To list long detials" >> /home/llewellyn/.bash_aliases
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echo "alias listlong='ls -latr'" >> /home/llewellyn/.bash_aliases
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echo "Set an alias named dir to be ls -aF | more"
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echo "" >> /home/llewellyn/.bash_aliases
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echo "# To show dir listing" >> /home/llewellyn/.bash_aliases
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echo "alias dir='ls -aF | more'" >> /home/llewellyn/.bash_aliases
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echo "Set an alias named del to be \"rm -i\"."
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echo "" >> /home/llewellyn/.bash_aliases
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echo "# To do a stupid prompt before every removal" >> /home/llewellyn/.bash_aliases
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echo "alias del='rm -i'" >> /home/llewellyn/.bash_aliases
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# 3. TERM and HOME
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echo "Display the values of your TERM and HOME environment variables to the screen."
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echo "TERM = ${TERM}"
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echo "HOME = ${HOME}"
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# 4. Hit the CTRL-D key combination
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echo "When the IGNOREEOF=4 the means pressing CTRL-D four times will only close my session."
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echo "" >> /home/llewellyn/.profile
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echo "# Prevent closing a session inadvertently" >> /home/llewellyn/.profile
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echo "export IGNOREEOF=4" >> /home/llewellyn/.profile
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# 5. MAN page
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echo "Write bash man page to ${PWD}/bash.txt"
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man bash > "${PWD}/bash.txt"
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echo "Write csh man page to ${PWD}/csh.txt"
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man csh > "${PWD}/csh.txt"
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echo "Write korn/ksh man page to ${PWD}/korn.txt"
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man ksh > "${PWD}/korn.txt"
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# 6. number of files in /usr/bin
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echo "list the number of files in /usr/local/bin"
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ls -1 /usr/bin | wc -l > ~/ls_output
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echo "~/ls_output is in the current user directory"
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echo "On my PC there is 1385 files in this directory"
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# 7. Display the current number of processes
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# running on your system using any number
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# of commands and a pipe. I want the number,
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# not just a list of processes.
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number=$(ps aux | wc -l)
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echo "There is ${number} prossess running right now."
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# 8. Explain the difference between “>” and “>>”
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# when using redirection. Also, what does
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# the “!” command do.
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# Give me an example and its output.
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echo "My whole script demostrates the >> and >"
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echo "The >> adds a new line to a file"
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echo "The > replace the whole file with the new given values"
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