Mastering Linux Command Line File Manipulation

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Which command is used to start a new tmux session?

$ tmux kill-session -t

$ tmux attach -t

$ tmux new-session (correct)

$ tmux ls

What is the purpose of using sed in the UNIX environment?

To automate edits (correct)

To list terminal sessions

To clear the screen

To install tmux

What does the command 'sed -i 's/old/new/g' *.txt' do?

Creates a new file named '*.txt'

Lists all files with the extension '.txt'

Deletes all files with the extension '.txt'

Replaces the word 'old' with 'new' in all files with the extension '.txt' (correct)

Which command is used to list files that don't match filea, fileb, or filec?

a-c Signup and view all the answers

What is the purpose of using quotes in shell scripting?

To access variable values inside the quotes Signup and view all the answers

Which command is used to substitute a pattern with a replacement in a file using sed?

a) s Signup and view all the answers

Which command is used to delete lines containing a specific pattern in a file using sed?

b) d Signup and view all the answers

Which command is used to obtain command arguments from another command's output?

expr Signup and view all the answers

Which command is used to append text after lines containing a specific pattern in a file using sed?

c) a Signup and view all the answers

What is the purpose of the '$$' special variable in shell scripting?

To get the shell process ID Signup and view all the answers

Which command is used to insert text before lines containing a specific pattern in a file using sed?

d) i Signup and view all the answers

Which command is used to terminate a process with a specified pid?

kill -9 pid Signup and view all the answers

What does the SIGHUP signal indicate?

The disconnection of a user's terminal Signup and view all the answers

What does the 'disown' command do?

Detaches a process from the current terminal Signup and view all the answers

What is the default behavior for the SIGHUP signal?

Stop executing processes Signup and view all the answers

Which command is used to create a new window in tmux?

$ tmux new-window Signup and view all the answers

What is the purpose of the 'sed' command in the UNIX environment?

All of the above Signup and view all the answers

What is the purpose of the 'tmux-resurrect' plugin?

To save and restore tmux sessions Signup and view all the answers

Which command is used to assign input to variables in shell scripting?

read Signup and view all the answers

What is the purpose of the 'expr' command in shell scripting?

To evaluate arithmetic expressions Signup and view all the answers

What is the purpose of the 'bg' command in UNIX?

To resume a suspended job and run it in the background Signup and view all the answers

What is the purpose of the 'time' command in UNIX?

To measure the execution time of a command Signup and view all the answers

Which command is used to run a command in the background in a shell script?

jobs Signup and view all the answers

What is the purpose of the 'nice' command in Unix-like OS?

To control the priority of a process Signup and view all the answers

What is the default niceness value in Unix-like OS?

0 Signup and view all the answers

What is the effect of having a higher niceness value on a process's CPU time?

The process will receive less CPU time Signup and view all the answers

Which command is used to delete empty lines in a file using sed?

sed '/^$/d' file.txt Signup and view all the answers

What does the command 'grep '^apple' file.txt' do?

Prints lines that start with 'apple' in the file.txt Signup and view all the answers

What does the command 'awk '{print $2}' file.txt' do?

Prints the second column of a space-separated file Signup and view all the answers

What is the purpose of using the '-n' option with sed?

Suppresses auto-display of pattern space Signup and view all the answers

Which command is used to start a new tmux session?

$ tmux new-session Signup and view all the answers

Which command is used to terminate a tmux session with a specified session name?

$ tmux kill-session -t Signup and view all the answers

Which command is used to create a new window in tmux?

$ tmux new-window Signup and view all the answers

Which command is used to assign input to variables in shell scripting?

read Signup and view all the answers

What is the purpose of using quotes in shell scripting?

To enclose strings that contain special characters Signup and view all the answers

What does the command 'grep' do in the UNIX environment?

Searches for a pattern in a file Signup and view all the answers

What is the purpose of the 'bg' command in UNIX?

Resumes a suspended job and runs it in the background Signup and view all the answers

Which command is used to delete lines containing a specific pattern in a file using sed?

sed '/pattern/d' file.txt Signup and view all the answers

Which command is used to append text after lines containing a specific pattern in a file using sed?

sed '/pattern/a\ ext' file.txt Signup and view all the answers

What is the purpose of using quotes in shell scripting?

To group multiple commands together Signup and view all the answers

What does the command 'grep '^apple' file.txt' do?

Matches lines that start with 'apple' Signup and view all the answers

Which command is used to run a command in the background in a shell script?

jobs Signup and view all the answers

What is the purpose of the 'nice' command in Unix-like OS?

To control the priority of a process Signup and view all the answers

What does the SIGHUP signal indicate?

The disconnection of a user's terminal Signup and view all the answers

What is the effect of having a higher niceness value on a process's CPU time?

The process receives less CPU time Signup and view all the answers

Which command is used to change the priority of a running process in Linux?

renice Signup and view all the answers

What is the range of niceness values in UNIX for representing process priority?

-20 to 19 Signup and view all the answers

What is the default behavior of the SIGHUP signal in UNIX?

Stops executing processes Signup and view all the answers

What is the purpose of the 'disown' command in UNIX?

Detach a process from the current terminal Signup and view all the answers

Mastering Linux Command Line File Manipulation

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Questions and Answers

Which command is used to start a new tmux session?

What is the purpose of using sed in the UNIX environment?

What does the command 'sed -i 's/old/new/g' *.txt' do?

Which command is used to list files that don't match filea, fileb, or filec?

What is the purpose of using quotes in shell scripting?

Which command is used to substitute a pattern with a replacement in a file using sed?

Which command is used to delete lines containing a specific pattern in a file using sed?

Which command is used to obtain command arguments from another command's output?

Which command is used to append text after lines containing a specific pattern in a file using sed?

What is the purpose of the '$$' special variable in shell scripting?

Which command is used to insert text before lines containing a specific pattern in a file using sed?

Which command is used to terminate a process with a specified pid?

What does the SIGHUP signal indicate?

What does the 'disown' command do?

What is the default behavior for the SIGHUP signal?

Which command is used to create a new window in tmux?

What is the purpose of the 'sed' command in the UNIX environment?

What is the purpose of the 'tmux-resurrect' plugin?

Which command is used to assign input to variables in shell scripting?

What is the purpose of the 'expr' command in shell scripting?

What is the purpose of the 'bg' command in UNIX?

What is the purpose of the 'time' command in UNIX?

Which command is used to run a command in the background in a shell script?

What is the purpose of the 'nice' command in Unix-like OS?

What is the default niceness value in Unix-like OS?

What is the effect of having a higher niceness value on a process's CPU time?

Which command is used to delete empty lines in a file using sed?

What does the command 'grep '^apple' file.txt' do?

What does the command 'awk '{print $2}' file.txt' do?

What is the purpose of using the '-n' option with sed?

Which command is used to start a new tmux session?

Which command is used to terminate a tmux session with a specified session name?

Which command is used to create a new window in tmux?

Which command is used to assign input to variables in shell scripting?

What is the purpose of using quotes in shell scripting?

What does the command 'grep' do in the UNIX environment?

What is the purpose of the 'bg' command in UNIX?

Which command is used to delete lines containing a specific pattern in a file using sed?

Which command is used to append text after lines containing a specific pattern in a file using sed?

What is the purpose of using quotes in shell scripting?

What does the command 'grep '^apple' file.txt' do?

Which command is used to run a command in the background in a shell script?

What is the purpose of the 'nice' command in Unix-like OS?

What does the SIGHUP signal indicate?

What is the effect of having a higher niceness value on a process's CPU time?

Which command is used to change the priority of a running process in Linux?

What is the range of niceness values in UNIX for representing process priority?

What is the default behavior of the SIGHUP signal in UNIX?

What is the purpose of the 'disown' command in UNIX?

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