Which of the following are characteristic of the

Which construct replaces a command with its output in a POSIX shell?

Star schema consists of:

In Bash, which syntax is used for arithmetic expansion?

How do you access the value of a variable named `USERNAME` in a shell script?

Which command is used to search text patterns in files?

Which command is used to display the number of lines in a file?

How do you check the exit status of the last executed command in a shell?

Which command is used to display the first few lines of a file?

In shell scripting, how do you assign the string "Hello World" to a variable named `MESSAGE`?

Which command is used to display the last 10 lines of a file in Linux?