Linux Part-I

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Linux Part-I

Packages can be downloaded but not installed with yum or dnf by specifying which option? *

1 point

None of these answers. yum does not support downloading packages without installing them.

--downloaddir

-d

--downloadonly

The ssh-copy-id command copies _ to the remote host. *

1 point

both private and public keys

the ssh public key

the ssh private key

a fingerprint file

When would this system cron job run its task? 0 1 * * * *

1 point

every minute of the hour

every hour of every day

every day at 1:00 AM

only on Mondays

Which command in Bash executes the last line in the shell history that starts with ls? *

1 point

!ls

What character class is equal to this set?[0-9] *

1 point

[[:alnum:]]

[[:digit:]]

[[:alpha:]]

[[:num:]]

What is the key difference between a redirect (>) and piping to the tee command? *

1 point

The tee command sends output only to STDOUT and STDERR.

A redirect sends output to STDOUT and a file, whereas a tee sends output only to STDOUT.

Nothing, they are the same.

The tee command sends output to STDOUT and a file, whereas a redirect sends output only to a file.

Assume the variable myNumber holds a string consisting of 10 digits. What will this command output? *

1 point

It will only match digits—and since the string has only digits, the command will output the same number without changes.

It will output the same 10-digit number, but every digit will be inside parentheses.

It will output the entire 10-digit number inside parentheses.

It will output the same 10-digit number, but the first 3 digits will be inside parentheses.

Which command will tell you how long a system has been running? *

1 point

log

uptime

runtime

access

What would this command output? *

1 point

the user ID, process ID, parent process ID, CPU usage, and command name of a process

the user ID, group ID, parent process ID, CPU usage, and command name of a process

the UUID, process ID, parent process ID, CPU usage, and command name of a process

all of these answers

Which command allows you to do packet analysis from the command line? *

1 point

wireshark

ethtool

netstat

tcpdump

What command is used to determine the amount of disk usage for a directory? *

1 point

find

fdisk

What does this command string do? *

1 point

It finds all files using ls -l and hands them off to the find command to display.

It finds all files older than 10 minutes and long lists them using the ls command.

It finds all files larger than 10 MB and long lists them using the ls command.

It uses the ls command to find all files in the filesystem matching the {} wildcard.

How would you describe PCP (Performance Co-Pilot)? *

1 point

It is an application testing suite used to profile programming code.

It is a local command used for monitoring local system resources in real time.

It is a set of tools, services, and libraries for gathering and analyzing performance measures.

It is a tool designed to change system configuration for purposes of optimization.

To mount a drive by its ID, what command would you use first to retrieve it? *

1 point

df -h

listid

ls -l

blkid

Linux file access control lists (ACLs) are _. *

1 point

discretionary access control system permissions layered over standard Linux permissions

mandatory access control system permissions layered over standard Linux permissions

a type of firewall for Linux

the same as standard Linux permissions

What command would you use to resize an LVM volume group to include an additional physical volume? *

1 point

vgadd

vgresize

vgappend

vgextend

You want to resolve a long list of DNS names using dig. What should you do? *

1 point

Create a text file including all names and use the -f option of dig.

Type in each query manually.

Write a shell script to send multiple dig queries to the DNS server.

Save the DNS names in an SQL database and process it with dig.

In a systemd-based OS, you can change the system hostname by editing /etc/hostname manually and then doing what? *

1 point

Restart dhcpd.

Run /etc/hostname.

Nothing, the system notices automatically.

Notify systemd to update it by restarting the systemd-hostnamed service.

You are managing an Apache web server on a system using SELinux. By default it cannot read personal webpages in users' home directories. What SELinux boolean would you set to allow this? *

1 point

apache_enable_homedirs

httpd_enable_userdirs

httpd_enable_homedirs

httpd_enable_userhome_dirs

When using iproute2, how do you show routing information for an IPv6 network? *

1 point

route -ipv6

route

ip -6 route show

ip route show

ifconfig has been deprecated. What command is now recommended for changing IP addresses in the live config? *

1 point

netconf

ipconfig

ipman

When archiving files, which command will preserve all file attributes including ACLs and SELinux security context? *

1 point

zip

tar