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CompTIA Linux+ XK0-005 Scripting & Automation Flashcards
CompTIA Linux+ XK0-005 (v7) Flashcards
| Front | Back |
| How can you check if a variable is empty in Bash | Use '[ -z "$variable" ]' |
| How do you capture the output of a command in a variable in Bash | Use backticks (`command`) or $(command) |
| How do you create a variable in Bash | variable_name=value |
| How do you list all scheduled cron jobs for the current user | crontab -l |
| How do you make a script executable | Use 'chmod +x <script_name>' |
| How do you redirect stderr to a file in Bash | Use '2>' followed by the file name |
| How do you remove a cron job for the current user | Use 'crontab -r' |
| How do you test for equality between two numbers in Bash | Use '[ value1 -eq value2 ]' |
| What command is used to debug a Bash script line-by-line | bash -x <script_name> |
| What does 'source' or '.' do in Bash | It executes a script in the current shell environment |
| What does $0 represent in a Bash script | It represents the name of the script being executed |
| What does the 'read' command do in Bash scripting | It reads user input and assigns it to a variable |
| What does the $? variable represent in Bash | It holds the exit status of the last executed command |
| What is cron syntax format | minute hour day month day_of_week command |
| What is the default shell environment variable that holds the user's path | PATH |
| What is the function of the 'export' command | To make an environment variable available to child processes |
| What is the purpose of 'set -e' in a Bash script | It exits the script if any command fails |
| What is the purpose of a shebang (#!) at the beginning of a script | It specifies the interpreter to execute the script. |
| What is the purpose of the 'trap' command in Bash scripting | To catch signals and execute commands when they occur |
| What operator is used to append output to a file | >> |
| What tool provides a simplified method for creating scheduled jobs in a human-readable format | Anacron |
| What variable is used to store the number of arguments passed to a script | $# |
| Which command is used to schedule a one-time task | at |
| Which command is used to schedule tasks on Linux | cron or at |
This deck explores bash scripting fundamentals, automation techniques, scheduled tasks, environment variables, and script debugging methods required for the Linux+ certification.