Study Guide Linux Terminals

Transcription

1 Study Guide Linux Terminals Q1 - Keyboard shortcuts Match the following actions or meanings to the corresponding keyboard shortcuts. # Actions # Shortcuts 1 Interrupt the currently executing program 1 ^C 2 Represents and end of file 2 ^Y 3 Suspends the currently executing program 3 ^W 4 Resumes the currently executing program 4 ^D 5 Stops the currently executing program and produces a CORE file 5 ^H 6 Freezes the terminal's display 6 ^S 7 Unfreezes the terminal's display 7 ^X or ^U 8 Erases last character 8 ^\ 9 Erases last word 9 ^Z 10 Deletes entire line 10 ^Q Q2 - Keyboard Signals Match the following actions to the corresponding Linux keyboard signals. # Actions # Signals 1 Interrupts the currently executing program 1 erase 2 Freezes the terminal's display 2 Eof 3 Stops the currently executing program and produces a CORE file 3 kill 4 Represents an End of File 4 Stop 5 Deletes the last character 5 intr 6 Deletes the last word 6 werase 7 Deletes the entire line 7 Quit Q3 - Definitions What do each of the following terms stand for? CURSES TERMINFO TERMCAP

2 NCURSES Q4 - Multiple Choice: Which of the following terminal types... Which of the following terminal types is equivalent to the Linux terminal type? 1. VT VT VT xterm 8. dxterm Q5 - What is a Core File? Select all that apply. A core file is generated when a running program encounters a serious fault 2....terminates its job attempts to access a memory area it is not allowed to receives a QUIT signal receives an INTR signal receives a STOP signal receives a KILL signal receives a DELETE signal Q6 - Name of Terminals What shell command would you issue to display the name of the terminal you are using? Q7 - TERMCAP We are using an old Linux system which is still managing its terminal information using the TERMCAP approach. What shell command would you issue to display the information about all the types of terminals the system is able to manage

3 Q8 - VT100 We are using a VT100 terminal on a Linux system which is managing its terminal information with the TERMINFO approach. What shell command would you issue to display the information about the terminal you are usin? Do not worry if results scroll on your screen and fill up more than a page. Q9 - Environmental Variables How do I get the shell to display a list of all the environmental variables and their values Q10 - Types of Terminals How do I get the shell to display the type of terminal I'm using Q11 - Definitions What does each of the following terms stand for; EOF CR LF Q12 - Generating Keyboard Signals Enter the keyboard shortcuts, e.g. ^W, which are used to produce each of the following keyboard signals. RETURN LINEFEED NEWLINE Q13 - Windows End of Line in text files How does Microsoft Windows systems mark the end of a line in a text file? Q14 - Linux End of Line in text files How do Linux systems mark the end of a line in a text file?

4 Q15 - Linux End of Line in Terminals How do Linux systems represent the end of line on a terminal display? Q16 - Boot Messages What shell command would I use to display the messages issued during the operating system's boot sequence? Q17 - Display Text Files I have a text file named readme.txt which is located in the current folder the shell I'm using operates. What shell command would I issue to visualize it? Q18 - Keyboard Signals What keyboard signal may I use to exit my shell? e.g. ^W? Q19 - Keyboard signals What keyboard signal is a destructive backspace usually mapped to? Q20 - Keyboard signals What keyboard shortcut do I use to pause the scrolling of my terminal's display? Q21 - Keyboard signals I just used ^S to freeze my terminal's display, what keyboard shortcut do I use to unfreeze it? Q22 - Next Exit is Korn Shell What shell command should I issue to prevent a user from exiting a Korn shell every time they hit ^D?

5 Q23 - Next Exit is Bash Shell What shell command would I issue to prevent users from exiting a BASH shell every time they hit ^D? Q24 - Displaying Key Mappings What shell command would I issue to display the key mappings in use? Q25 - TTY not found? I issued the TTY command in my shell in order to see the name of the terminal I was using. The shell responded command not found. Explain why. Q26 - TERMCAP vs. TERMINFO What is the difference between TERMCAP and TERMINFO? Q27 - No work today You are working on your terminal when, after a coffee break, you come back and realize that nothing you type echoes on the terminal anymore. It is still display the prompt as it was when you left. What might be the problem and how do I fix it? Q28 - To Pause or not to pause I just started a program which processes a large amount of data from a data base. Every time a report is ready, which happens about every 5 minutes, it is both displayed on the screen and sent to the printer. After making sure that the program is working and seeing 3 of these reports displayed on the screen, I paused it using ^S and went home. The next morning, the screen still only shows the 3 reports but the printer at the end of the hall ran out of paper after printing 357 of them. What happened? Q29 - This is not^h^h^h working I just logged in remotely to my Linux server from a public library computer. Every time I press the BACKSPACE key a ^H symbol appear on my command line but no characters are deleted. Explain in your own words what is happening.