Work in progress

Go here to see first 9 completed chapters.

Chapter 11: Arrays

• Creating array
• Accessing Arrays

Chapter 12: Date and String Manipulation

• Bash string manipulation
  • Find the length of string
  • Howto: convert string to all uppercase
  • Howto: convert string to all lowercase
  • Howto: strip leading spaces from the string
  • Howto: extract substring
    • Removing portions of a string
  • Howto: find and replace the string
  • Howto: strip non-directory suffix from file name
  • Howto: strip directory and suffix from file name
• date command
  • date: finding yesterday
  • date: finding tomorrow
  • Adjust a date
  • Timezone and TZ variable
  • Formatting date for filenames and variables

Chapter 13: Filters

• find command
• grep command
• gawk command
• sed command
• cut command
• paste command
• tr command
• uniq utility
• sort utility

Chapter 14: Advanced Sys Admin topics

• Cron jobs
  • Scheduling a script to execute later
  • at command
• Creating man pages
• Creating source code patches
• OpenSSH
  • The OpenSSH client
  • The OpenSSH Server
  • Password less login
    • Protecting your keys
• Rsync remote file-copying tool
• Set default values for parameters
• The shift command
• The getopts command
• Services
  • Which services are running?
  • Remote service detection
• Packet filtering
  • iptables shell script
  • Blocking ip address

Chapter 15: Putting It All Together

• Co-Processing - controlling other programs
• File system backup scripts
• MySQL database backup scripts
• PostgreSQL database backup scripts
• User management scripts
• FTP login scripts
• SSH login scripts
• Remote login scripts
• Server monitoring scripts
• Web based cgi-bin bash scripts
• BIND DNS scripts
• Webserver virtual domain management scripts
• Linux firewall management scripts