Index
A
- alarm
- generating / How to do it..., How it works...
- alias command / Adding aliases, and altering user paths/variables, How it works...
- aliases
- apt command / Getting ready
- arrays / How it works...
- artefact / Readying your script for different languages with internationalization
- artifact / Readying your script for different languages with internationalization
- ASCII / Basic searching for strings and files
- audio
- playing / Playing and managing audio from Bash, How it works…
- managing / Getting ready, How it works…
- AWK
- used, for replacing substrings / Getting ready, How it works...
B
- Bash
- fundamentals / Getting started with Bash and CLI fundamentals
- about / Introduction
- strings, managing / Striping/altering/sorting/deleting/searching strings with Bash only
- battery life, monitoring / Getting ready
- Bash script
- creating, with Vim / Your first Bash script with Vim
- used, for monitoring udev input / Getting ready, How it works…
- simple frontend GUIs, creating for / Getting ready, How to do it...
- Bash shell
- basic loops
- about / Basic loops
- for loop / For loop
- do while loop / Do while loop
- basic network connectivity
- configuring / Configuring basic network connectivity, How to do it..., How it works...
- battery life
- monitoring, Bash used / Getting ready
- binary
- about / Formatting your data/output using echo and printf
- dependencies, finding / Finding binary dependencies, How to do it..., How it works...
- binary numbers
- evaluating / Evaluating binary numbers
- bzip2 / How it works...
C
- calculations
- in scripts / Math and calculations in script, Getting ready, How to do it..., How it works...
- case statement
- creating / Case/switch statements and loop constructs
- about / Basic case statement
- cat command / How to do it…
- chroot
- used, for securing scripts / Using chroot and restricted Bash shells to secure scripts, How it works…
- CLI
- graphics, creating on / Getting ready, How it works...
- presentations, creating on / Getting ready, How it works...
- web, browsing from / Browsing the web from the CLI, How it works...
- command line colors / How to do it...
- command not found warnings/errors
- commands
- linking / Linking commands, pipes, and input/output
- about / Getting additional information about commands
- invoking, on permission requirement / Invoking commands when they require permissions, Getting ready, How to do it..., How it works...
- Comma Separated Values (CSV) / Reading delimited data and altered output format
- conditional logic
- using / Conditional logic using if, else, and elseif
- file attributes, using with / Using file attributes with conditional logic, How to do it..., How it works...
- config file
- creating / Creating a config file and using it in tandem with your scripts, How to do it...
- using, in shell script / Creating a config file and using it in tandem with your scripts, How to do it...
- configuration
- adding, to /etc/logrotate.d/ / Adding configuration to /etc/logrotate.d/
- connectivity diagnostics / Getting ready, How to do it..., How it works...
- Cron Jobs
- crontab command / How it works...
- curl command / How it works…
D
- data
- formatting, echo used / Formatting your data/output using echo and printf
- formatting, printf used / Formatting your data/output using echo and printf
- datasets
- date command / Fetching time from different locations
- dd command
- delimited data
- delimiters / Reading delimited data and altered output format
- dialog command / Creating graphics and presentations on the CLI
- diff
- creating, of two files / Creating a diff of two files and patching, Getting ready, How to do it..., How it works...
- directories
- monitoring / Monitoring directories and files, How it works...
- dmidecode tool / Gathering and aggregating system information
- DMZ firewall
- creating / Creating a simple NAT and DMZ firewall, How it works…
- do while loop / Do while loop
- duplicate directories
- finding / Finding and deleting duplicate files or directories, Getting ready
- deleting / How to do it..., How it works...
- duplicate files
- finding / Finding and deleting duplicate files or directories, Getting ready, How to do it...
- deleting / How it works...
- duplicates
- reducing, based on file contents / Calculating statistics and reducing duplicates based on file contents, How to do it..., How it works...
E
- echo
- data, formatting / Formatting your data/output using echo and printf
- output, formatting / Formatting your data/output using echo and printf
- elif statement / Conditional logic using if, else, and elseif
- ELinks / Browsing the web from the CLI
- else statement / Conditional logic using if, else, and elseif
- encoding scheme / Basic searching for strings and files
- escape character / Hidden Bash variables and reserved words
- evtest tool / Using Bash scripts to monitor udev input
- extension
- files, searching by / Searching for files by name and/or extension, Getting ready, How to do it..., How it works...
- external functions
F
- failed SSH attempts
- IP addresses, blocking from / Blocking IP addresses from failed SSH attempts, How it works…
- file-in-file-out program
- file attributes
- using, with conditional logic / Using file attributes with conditional logic, How to do it..., How it works...
- file descriptor
- reference / Linking commands, pipes, and input/output
- file integrity
- checking for / Checking for file integrity and tampering
- files
- basic searching / Basic searching for strings and files, How to do it..., How it works...
- viewing, from various angles / Viewing files from various angles – head, tail, less, and more, Getting ready, How to do it..., How it works...
- searching, by name/extension / Searching for files by name and/or extension, Getting ready, How to do it..., How it works...
- joining, at arbitrary positions / Joining and splitting files at arbitrary positions, Getting ready, How to do it..., How it works...
- splitting, at arbitrary positions / Joining and splitting files at arbitrary positions, Getting ready, How to do it..., How it works...
- generating, of multiple sizes / Generating datasets and random files of various size, Getting ready, How it works...
- monitoring / Monitoring directories and files, How it works...
- compressing / Compressing and archiving files, How to do it...
- archiving / Compressing and archiving files, How to do it...
- new configuration directives / Adding configuration to /etc/logrotate.d/
- retrieving / Mounting network file systems and retrieving files, How it works...
- encrypting, from script / Encrypting/decrypting files from a script
- decrypting, from script / Encrypting/decrypting files from a script
- collecting / Scraping the web and collecting files, How it works…
- filesystem directories
- firewall
- Linux IPtables, using for / Using Linux iptables for a firewall, How to do it..., How it works...
- float / Creating and using basic variables
- for loop
- about / For loop
- functions, using with parameters / Using a function with parameters within a for loop
- format / Basic searching for strings and files
- functions
- using / Using functions and parameters
G
- git command / Parsing a GitHub project and generate a report
- GitHub project
- global context / Hidden Bash variables and reserved words
- globbing / Using wildcards and regexes
- graphics
- creating, on CLI / Creating graphics and presentations on the CLI, How it works...
- grep command / Linking commands, pipes, and input/output, How it works..., How to do it…
- groups
- creating / How to do it...
H
- head command / Viewing files from various angles – head, tail, less, and more
- headers
- including / Including source files
- here-string / How it works...
- hexadecimal / Formatting your data/output using echo and printf
- hidden variables / Hidden Bash variables and reserved words
- high-quality scripts
- HTTP GET method / How to do it…
- HTTP POST method / How to do it…
- hunk / How it works...
I
- if statement / Conditional logic using if, else, and elseif
- incremental remote backup
- inotify / Monitoring directories and files
- inotifywait command / How it works...
- integer / Creating and using basic variables
- integrated development editors (IDEs) / Getting started with Bash and CLI fundamentals
- internationalization
- script, reading for languages / Readying your script for different languages with internationalization, Getting ready, How to do it..., How it works...
- inverted logic / How it works...
- IP addresses
- blocking, from failed SSH attempts / Blocking IP addresses from failed SSH attempts, How it works…
- iptables / Using Linux iptables for a firewall
- iwconfig command / Linking commands, pipes, and input/output
J
- jobs / Getting ready
L
- lame utility HTTP server
- less command / Viewing files from various angles – head, tail, less, and more
- library script
- Linux IPtables
- using, for firewall / Using Linux iptables for a firewall, How to do it..., How it works...
- literal string / Creating and using basic variables
- log files
- managing / How to do it..., How it works...
- logrotate command / Getting ready
- logs
- files, rotating from RAM to storage / Rotating files from RAM to storage for log rotation
- loops
- until loop / Until loop
- writing / Writing one-line conditional statements and loops, How it works...
- Lorem Ipsum / How it works...
- ls command / Getting started with Bash and CLI fundamentals
M
- man command / Getting additional information about commands
- math
- in scripts / Math and calculations in script, Getting ready, How to do it..., How it works...
- MD5sum / Finding and deleting duplicate files or directories
- media file
- more command / Viewing files from various angles – head, tail, less, and more
- mount command / Mounting network file systems and retrieving files, How to do it...
N
- name
- files, searching by / Searching for files by name and/or extension, Getting ready, How to do it..., How it works...
- named pipes / How to do it...
- nested conditional statements / Nested if statements
- network file systems
- network information
- gathering / Getting ready, How to do it..., How it works...
- network traffic
- capturing, headlessly / Capturing network traffic headlessly, How to do it...
O
- one-line conditional statements
- OpenSSL / How it works...
- output
- retrieving / Retrieving return codes and output
- echoing, to raw terminal devices / Echoing output to raw terminal devices, How to do it...
- output format
- output HTML / How to do it…
P
- parameters
- using / Using functions and parameters
- passwordless remote access
- SSH keys, creating for / Creating SSH keys for password less remote access, How to do it...
- patch / Creating a diff of two files and patching
- patching / How to do it..., How it works...
- pattern / Basic searching for strings and files
- pipes / Redirection and pipe bonzanza, Creating a file-in-file-out program and running processes in parallel
- play command / How it works…
- portability
- presentations
- creating, on CLI / Creating graphics and presentations on the CLI, How it works...
- printf
- data, formatting / Formatting your data/output using echo and printf
- output, formatting / Formatting your data/output using echo and printf
- processes
- running, in parallel / Creating a file-in-file-out program and running processes in parallel, How to do it..., How it works...
- program flags
- passing / Passing your program flags
- program input parameters
- obtaining / Getting program input parameters
- programs
- keeping running, after logoff / Keeping programs/scripts running after logoff, Getting ready, How to do it..., How it works...
- temporary files, using / Using temporary files and lock files in your program, Getting ready, How it works...
- lock files, using / Using temporary files and lock files in your program, Getting ready, How it works...
- pwd command / Getting started with Bash and CLI fundamentals
R
- raw terminal devices
- output, echoing to / Echoing output to raw terminal devices, How to do it...
- readarray command / How it works...
- recursive functionality / Introduction
- redirection / Redirection and pipe bonzanza
- regexes
- using / Using wildcards and regexes, Getting ready, How to do it..., How it works...
- reference / How it works...
- report
- generating / Getting ready
- reserved words
- about / Hidden Bash variables and reserved words
- reference / Hidden Bash variables and reserved words
- restricted Bash shells
- used, for securing scripts / Using chroot and restricted Bash shells to secure scripts, How it works…
- return codes
- retrieving / Retrieving return codes and output
- return codes 101 / Return code 101
- root user / Getting started with Bash and CLI fundamentals
- RSS feeds
- parsing / Parsing RSS feeds and output HTML
S
- scope / Creating and using basic variables
- scp command / How to do it...
- scripts
- running, indefinitely / Running a program continuously (forever) using looping constructs or recursion, Getting ready, How to do it..., How it works...
- keeping running, after logoff / Keeping programs/scripts running after logoff, Getting ready, How to do it..., How it works...
- executing, on startup / Executing your script on startup, Getting ready, How to do it..., How it works...
- files, encrypting from / Getting ready
- files, decrypting from / Getting ready
- securing, restricted Bash shells used / Using chroot and restricted Bash shells to secure scripts, How it works…
- securing, chroot used / Using chroot and restricted Bash shells to secure scripts, How it works…
- runtime, calculating / Calculating and reducing the runtime of a script, How it works...
- runtime, reducing / Calculating and reducing the runtime of a script, How it works...
- Select
- used, for making simple user menu / Making a simple multi-level user menu using select, How to do it..., How it works...
- SHA512sum / Finding and deleting duplicate files or directories
- shell
- shell script
- about / Getting started with Bash and CLI fundamentals
- config file, using in / Creating a config file and using it in tandem with your scripts, How to do it...
- SIGHUP / Generating and trapping signals for cleanup
- sign / How it works...
- signals
- generating / Generating and trapping signals for cleanup, Getting ready, How it works...
- trapping, for cleanup / Generating and trapping signals for cleanup, Getting ready, How it works...
- simple frontend GUIs
- creating, for Bash scripts / Creating simple frontend GUIs for Bash scripts, How to do it...
- simple IRC chat bot logger
- simple NAT firewall
- creating / Creating a simple NAT and DMZ firewall, How it works…
- source files
- including / Including source files
- SoX / Playing and managing audio from Bash
- SQL databases
- accessing, remotely / Accessing SQL databases remotely or locally, How it works...
- accessing, locally / Getting ready, How it works...
- SSH keys
- creating, for passwordless remote access / Creating SSH keys for password less remote access, How to do it...
- statistics
- stream editor (SED)
- about / Using SED and AWK to remove/replace substrings
- used, for removing substrings / Getting ready, How it works...
- strings
- about / Creating and using basic variables
- evaluating / Evaluating strings
- basic searching / Basic searching for strings and files, How to do it..., How it works...
- striping / Striping/altering/sorting/deleting/searching strings with Bash only, Getting ready, How to do it...
- altering / Striping/altering/sorting/deleting/searching strings with Bash only, How to do it..., How it works...
- sorting / Striping/altering/sorting/deleting/searching strings with Bash only, How to do it...
- deleting / How to do it...
- searching / How it works...
- substitute user do (Sudo) / Invoking commands when they require permissions
- substrings
- removing, SED used / Getting ready, How it works...
- replacing, AWK used / Getting ready, How it works...
- switch statement
- creating / Case/switch statements and loop constructs
- symbolic links
- Syslog entries
- system information
T
- tail command / Linking commands, pipes, and input/output, Viewing files from various angles – head, tail, less, and more
- tampering
- checking for / Checking for file integrity and tampering
- TAR file / How it works...
- tcpdump / Capturing network traffic headlessly
- terminal / Getting started with Bash and CLI fundamentals
- terminal sessions
- recording, for automation / Recording terminal sessions for automation, How it works...
- time
- fetching, from different locations / Fetching time from different locations, How it works...
- time command / Calculating and reducing the runtime of a script, How to do it...
- timeout
- leveraging, on wait for command completion / Leveraging timeout when waiting for command completion, How to do it..., How it works...
- TLP / Using Bash to monitor battery life and optimize it, How it works…
- tree
- ttyrec tool / Recording terminal sessions for automation
U
- udev input
- monitoring, Bash scripts used / Using Bash scripts to monitor udev input, How it works…
- until loop / Until loop
- useradd command / How to do it...
- user input
- user menu
- making, Select used / Making a simple multi-level user menu using select, How to do it..., How it works...
- user paths
- users
- creating / Creating users and groups systematically
- UTF / Basic searching for strings and files
V
- variable assignment / Hands-on variable assignment
- variables
- creating / Creating and using basic variables
- using / Creating and using basic variables
- hidden variables / Hidden Bash variables and reserved words
- altering / Adding aliases, and altering user paths/variables
- Vim
- Bash script, creating / Your first Bash script with Vim
- reference / Your first Bash script with Vim
W
- W3M / Browsing the web from the CLI
- web
- browsing, from CLI / Browsing the web from the CLI, How it works...
- scraping / Scraping the web and collecting files, How it works…
- wget utility / How it works…
- whoami command / Getting started with Bash and CLI fundamentals
- wildcards
- wpa_supplicant / Configuring basic network connectivity
Z
- zenity tool
- about / Creating simple frontend GUIs for Bash scripts
- working / How it works...
- zip / How it works...