Learning Linux Shell Scripting - Info and Reading Options

"Learning Linux Shell Scripting" Table Of Contents:

• 1- Cover; Title Page; Copyright and Credits; Dedication; Packt Upsell; Contributors; Table of Contents; Preface; Chapter 1: Getting Started and Working with Shell Scripting; Comparison of shells; Tasks done by the shell; Working in the shell; Learning basic Linux commands; Our first script
• 2- Hello World; When not to use scripts; Various directories; Working with permissions; Changing file permissions; The chmod command; Technique one
• 3- the symbolic method; Technique two
• 4- the numeric method; Setting umask; Setuid; Setgid; Sticky bit; Summary.
• 5- Chapter 2: Drilling Deep into Process Management, Job Control, and AutomationIntroducing process basics; Monitoring processes using ps; Process management; Process monitoring tools
• 6- top, iostat, and vmstat; Understanding ""at; Understanding crontab; Summary; Chapter 3: Using Text Processing and Filters in Your Scripts; Text filtering tools; Head and tail; The diff command; The cut command; The paste command; The join command; The uniq command; The comm command; The tr command; The sort command; IO redirection; File descriptors; Redirection; Brace expansion.
• 7- Pattern matching with the vi editorPattern searching using grep; Summary; Chapter 4: Working with Commands; Learning shell interpretation of commands; Checking and disabling shell internal commands; The exit status; Command substitution; Command separators; Command1; command2; Command grouping; Logical operators; Command1 & command2; Command1 & & command2; Command1 || command2; Pipes; Summary; Chapter 5: Exploring Expressions and Variables; Understanding variables; Working with environment variables; The local variable and its scope; Exporting variables; Working with read-only variables.
• 8- Working with command-line arguments (special variables, set and shift, getopt)Understanding set; Understanding shift; Resetting positional parameters; Understanding getopts; Understanding default parameters; Working with arrays; Creating an array and initializing it; Accessing array values; Summary; Chapter 6: Neat Tricks with Shell Scripting; Interactive shell scripts
• 9- reading user input; Summarizing the read command with options; The here document and the <<operator; The here operator with the sort command; The here operator with the wc command; The utility ed and here operator.
• 10- A script for sending messages to all logged-in usersUsing the <<here operator for FTP usage and data transfer; Turning off variable substitution; The here string and the <<<operator; File handling; Introducing file handling; Using exec to assign a file descriptor (fd) to file; Understanding the opening, writing, and closing of a file; Understanding reading from a file; Understanding reading and writing to a file; Using the read command on a file descriptor (fd); Reading from one file and writing to another file; Displaying the file descriptor information from the /proc folder.
• 11- File handling
• 12- reading line by line.

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