RHCSA Study Set Complete With Accurate Solutions
While configuring security groups, how do you connect all IPs to your cloud
server Right Ans - 0.0.0.0/0
What is an important requirement to SSH into your cloud server? Right Ans
- A key pair
whoami Right Ans - Displays the user you are currently logged in as
Ip addr show Right Ans - Displays ip address information
free -m Right Ans - Displays free and used memory in the system (-m flag
indicates memory in MB)
df -h Right Ans - view device free space in human readable form
find mnt Right Ans - Displays file systems mounted on the server
What is the bash shell? Right Ans - a command line interpreter that
processes Linux commands
What provides the capability to tab x2 for more command options? Right
Ans - The bash shell
What partition can you not boot from? Right Ans - LVM (you need to boot
from a standard partition)
How would you disable the auto lock feature? Right Ans - Settings -> power
-> blankscreen -> never
What are the command line symbols to show a normal user and admin?
Right Ans - $= normal user #= admin
How do you login to root? Right Ans - su -
How do you run a command as root? Right Ans - sudo (command)
,What program is used to deploy cloud servers and what are instances?
Right Ans - EC2 and instances are the amount of servers
history Right Ans - Displays all commands previously ran
!2 Right Ans - Runs the second command displayed when you run the
history command
!a Right Ans - Runs the command that starts with an a ,when running the
history command
CTRL + r Right Ans - Re-runs a command that you previously typed.
ps aux Right Ans - Displays all processes running
How do you display the word count for a commands output? Right Ans -
(Command) | wc
How do you redirect the commands output to a specific file path? Right Ans
- > (>> redirects without overriding existing information)
How do you redirect the commands error output and which file path deletes
files sent to it? Right Ans - 2> /dev/null
What is an example of an environment variable that changes the bash shell?
Right Ans - s_colors
alias g=grep Right Ans - Creates a shortcut for the command so you can
now type g to use the command
Standard Input (STOIN), Standard Output (STOUT), and Standard Error
(STOERR) Right Ans - You (STOIN) -> Command -> Terminal (STOUT)
For STOERR the default is STOERR -> Terminal (using 2> redirects STOERR)
who Right Ans - Displays users currently connected to the server
grep -R student /etc Right Ans - grep: searches for files/directories -R:
Looks for sub-directories student: searches for the word student /etc:
searches in /etc
, ls -l /etc | grep host Right Ans - lists files that only have host in the name
What is FHS? Right Ans - Filesystem Hierarchy Standard
defines structure and contents.
The boot directory Right Ans - files needed to boot the system. Ex: vmlinuz-
4.18.0-32 is the kernel (allows the software to talk to the hardware).
The dev directory Right Ans - contains device file for the system to talk to
certain hardware
The etc directoy Right Ans - configuration files. Ex: user password file
home directory Right Ans - individual user directories
usr directory Right Ans - binaries, commands, and software executables
var directory Right Ans - used to write dynamic data. Ex: log files
While in the manual pages how do you search, go to the next result, and go to
the bottom of the manual page. Right Ans - / (word) n G
How many manual page sections are there and what are the 3 important
ones? Right Ans - 9 1 = executable programs, 5 = file formats, and 8 =
system admin commands.
Where could you find related commands in the man pages? Right Ans - See
also
If you are using the man -k commands and are receiving a "nothing
appropriate" error, what command do you use? Right Ans - mandb
man -k user | grep 8 Right Ans - searches man pages for the word user but
only in section 8
What is the minimum amount of information that you need to provide during
Linux installation? Right Ans - Installation destination and the root
password.
While configuring security groups, how do you connect all IPs to your cloud
server Right Ans - 0.0.0.0/0
What is an important requirement to SSH into your cloud server? Right Ans
- A key pair
whoami Right Ans - Displays the user you are currently logged in as
Ip addr show Right Ans - Displays ip address information
free -m Right Ans - Displays free and used memory in the system (-m flag
indicates memory in MB)
df -h Right Ans - view device free space in human readable form
find mnt Right Ans - Displays file systems mounted on the server
What is the bash shell? Right Ans - a command line interpreter that
processes Linux commands
What provides the capability to tab x2 for more command options? Right
Ans - The bash shell
What partition can you not boot from? Right Ans - LVM (you need to boot
from a standard partition)
How would you disable the auto lock feature? Right Ans - Settings -> power
-> blankscreen -> never
What are the command line symbols to show a normal user and admin?
Right Ans - $= normal user #= admin
How do you login to root? Right Ans - su -
How do you run a command as root? Right Ans - sudo (command)
,What program is used to deploy cloud servers and what are instances?
Right Ans - EC2 and instances are the amount of servers
history Right Ans - Displays all commands previously ran
!2 Right Ans - Runs the second command displayed when you run the
history command
!a Right Ans - Runs the command that starts with an a ,when running the
history command
CTRL + r Right Ans - Re-runs a command that you previously typed.
ps aux Right Ans - Displays all processes running
How do you display the word count for a commands output? Right Ans -
(Command) | wc
How do you redirect the commands output to a specific file path? Right Ans
- > (>> redirects without overriding existing information)
How do you redirect the commands error output and which file path deletes
files sent to it? Right Ans - 2> /dev/null
What is an example of an environment variable that changes the bash shell?
Right Ans - s_colors
alias g=grep Right Ans - Creates a shortcut for the command so you can
now type g to use the command
Standard Input (STOIN), Standard Output (STOUT), and Standard Error
(STOERR) Right Ans - You (STOIN) -> Command -> Terminal (STOUT)
For STOERR the default is STOERR -> Terminal (using 2> redirects STOERR)
who Right Ans - Displays users currently connected to the server
grep -R student /etc Right Ans - grep: searches for files/directories -R:
Looks for sub-directories student: searches for the word student /etc:
searches in /etc
, ls -l /etc | grep host Right Ans - lists files that only have host in the name
What is FHS? Right Ans - Filesystem Hierarchy Standard
defines structure and contents.
The boot directory Right Ans - files needed to boot the system. Ex: vmlinuz-
4.18.0-32 is the kernel (allows the software to talk to the hardware).
The dev directory Right Ans - contains device file for the system to talk to
certain hardware
The etc directoy Right Ans - configuration files. Ex: user password file
home directory Right Ans - individual user directories
usr directory Right Ans - binaries, commands, and software executables
var directory Right Ans - used to write dynamic data. Ex: log files
While in the manual pages how do you search, go to the next result, and go to
the bottom of the manual page. Right Ans - / (word) n G
How many manual page sections are there and what are the 3 important
ones? Right Ans - 9 1 = executable programs, 5 = file formats, and 8 =
system admin commands.
Where could you find related commands in the man pages? Right Ans - See
also
If you are using the man -k commands and are receiving a "nothing
appropriate" error, what command do you use? Right Ans - mandb
man -k user | grep 8 Right Ans - searches man pages for the word user but
only in section 8
What is the minimum amount of information that you need to provide during
Linux installation? Right Ans - Installation destination and the root
password.
