Practice: Linux Command-Line and Desktop OS

A technician needs to see the full path of the current working directory in a Linux terminal. Which command displays this information?

• Pwd

• Cd

• Find

• Ls

A Linux admin wants to give the owner read, write, and execute permissions on a file, while denying all permissions to group and others. Which chmod command accomplishes this?

• Chmod 777 filename

• Chmod 700 filename

• Chmod 644 filename

• Chmod 755 filename

A user needs to install the Apache web server on an Ubuntu system using the command line. Which command correctly installs the package?

• Yum install apache2

• Apt-get install apache2

• Sudo find apache2 --install

• Su install apache2

A technician needs to check the IP address assigned to a network interface on a Linux machine. Which TWO commands can be used to inspect network interface information?

• Dig localhost

• Grep ifconfig

• Ip addr

• Ip link

A technician wants to search the file /var/log/syslog for all lines containing the word 'error'. Which command accomplishes this?

• Grep error /var/log/syslog

• Find /var/log/syslog -name error

• Cat error /var/log/syslog

• Nano /var/log/syslog error

A Linux admin needs to view all currently running processes along with CPU and memory usage in real time. Which command is best suited for this task?

• Df

• Ls -la

• Ps

• Top

A technician needs to rename a file called report.txt to final_report.txt in the same directory. Which command should be used?

• Chmod report.txt final_report.txt

• Mv report.txt final_report.txt

• Rm report.txt final_report.txt

• Cp report.txt final_report.txt

A junior admin needs to run a command with elevated root privileges without fully switching to the root account. Which TWO approaches allow this on a Linux system?

• Use grep to filter root output

• Use df -h to check available space

• Use sudo before the command

• Use su - to switch to the root account temporarily

A technician wants to find all files named config.txt anywhere under the /etc directory. Which command is correct?

• Cat /etc config.txt

• Ls /etc config.txt

• Find /etc -name config.txt

• Grep -r config.txt /etc

A technician wants to check how much disk space is available on all mounted filesystems in a human-readable format. Which command should be used?

• Ps aux

• Df -h

• Top -d 1

• Ip addr show