Cron Email with msmtp MCQ Quiz

Question 1 Not answered

What is the main purpose of configuring msmtp with cron?

To make cron jobs run faster To allow cron jobs to send email notifications through an SMTP server To replace the Linux kernel scheduler To create new Gmail accounts automatically

Explanation: msmtp acts as an SMTP client so cron/mail output can be delivered to an external inbox such as Gmail.

Question 2 Not answered

What does MAILTO do inside a crontab?

It changes the system hostname It installs the mail command It disables cron jobs permanently It sets the email address where cron sends job output

Explanation: MAILTO tells cron where to send output generated by cron jobs.

Question 3 Not answered

Which password should be used for Gmail SMTP with msmtp?

Google App Password Normal Gmail login password Linux root password SSH private key password

Explanation: For Gmail SMTP, use a Google App Password, not your normal Gmail password.

Question 4 Not answered

What must usually be enabled before creating a Google App Password?

Guest mode Browser sync 2-Step Verification Google Drive offline mode

Explanation: Google App Passwords require 2-Step Verification to be enabled on the Google Account.

Question 5 Not answered

Which file is commonly used for system-wide msmtp configuration?

/etc/crontab.conf /etc/msmtprc /var/log/msmtp.conf /home/msmtp/config

Explanation: The system-wide msmtp configuration file is commonly `/etc/msmtprc`.

Question 6 Not answered

Which file can be used for user-specific msmtp configuration?

~/.msmtprc ~/.crontabrc ~/mail.conf ~/smtp.log

Explanation: A user-specific msmtp configuration can be stored in `~/.msmtprc`.

Question 7 Not answered

Which command secures `/etc/msmtprc` so only the owner can read and write it?

sudo chmod 777 /etc/msmtprc sudo chmod 000 /etc/msmtprc sudo chmod +x /etc/msmtprc sudo chmod 600 /etc/msmtprc

Explanation: `chmod 600` allows only the file owner to read and write the file.

Question 8 Not answered

Why should `/etc/msmtprc` be protected?

It contains kernel modules It stores user home directories It contains the Gmail App Password It stores Docker images

Explanation: The msmtp config contains sensitive SMTP credentials, so permissions should be strict.

Question 9 Not answered

Which command creates the msmtp log file if it does not exist?

sudo mkdir /var/log/msmtp.log sudo touch /var/log/msmtp.log sudo chmod /var/log/msmtp.log sudo cron /var/log/msmtp.log

Explanation: `touch` creates the file if it does not exist.

Question 10 Not answered

Which command tests msmtp directly with a subject line?

mail status msmtp cron --test-email user@gmail.com systemctl test msmtp user@gmail.com printf "Subject: msmtp direct test\n\nTest email\n" | msmtp user@gmail.com

Explanation: Using `printf` with a Subject header and piping to msmtp is a direct SMTP test.

Question 11 Not answered

What does this error mean: `mail: cannot send message: Process exited with a non-zero status`?

The mail command attempted to send, but the mail sending process failed The email was definitely delivered successfully Cron is disabled permanently The system has no users

Explanation: This means the mail-sending backend failed. You should check msmtp logs and sendmail linkage.

Question 12 Not answered

Which command helps check msmtp errors?

cat /etc/passwd df -h cat /var/log/msmtp.log lsblk

Explanation: `/var/log/msmtp.log` stores msmtp log messages if configured.

Question 13 Not answered

Which command checks whether `/usr/sbin/sendmail` points to msmtp?

hostnamectl readlink -f /usr/sbin/sendmail crontab -e lsblk -f

Explanation: `readlink -f /usr/sbin/sendmail` shows the real target of the sendmail compatibility path.

Question 14 Not answered

What does `account default : gmail` mean in `/etc/msmtprc`?

Create a new Gmail account Delete the Gmail account Disable SMTP authentication Use the gmail account block as the default msmtp account

Explanation: It tells msmtp to use the configured `gmail` account by default.

Question 15 Not answered

Which SMTP host is used for Gmail in this lab?

smtp.gmail.com mail.localhost imap.gmail.com github.com

Explanation: Gmail SMTP uses `smtp.gmail.com`.

Question 16 Not answered

Which SMTP port was used for Gmail TLS submission in this lab?

22 80 587 443

Explanation: Port 587 is commonly used for SMTP submission with STARTTLS.

Question 17 Not answered

What happens if cron output is redirected using `>> logfile 2>&1`?

Cron sends two emails every minute Output and errors go to the log file instead of being emailed by cron The script is deleted The system timezone changes

Explanation: Redirection sends stdout and stderr to the log file, so cron may have no output left to email.

Question 18 Not answered

What does `MAILTO=""` mean?

Send email to root only Use Gmail automatically Restart cron Disable cron email output

Explanation: An empty MAILTO disables cron email for that crontab.

Question 19 Not answered

Which cron entry sends email every minute if the command produces output?

* * * * * echo "Hello from cron at $(date)" 0 2 * * * /opt/scripts/backup.sh >> /var/log/backup.log 2>&1 # * * * * * echo "Hello" MAILTO=""

Explanation: This command runs every minute and prints output, so cron can email that output if MAILTO is set.

Question 20 Not answered

Why should you remove or comment the every-minute test cron job after testing?

It will uninstall msmtp It will disable Gmail It will keep sending email every minute It will delete /etc/msmtprc

Explanation: The test job runs every minute, so leaving it active will flood your inbox.

Question 21 Not answered

Which cron style is best when you want logs only and no email?

MAILTO="email" with no command MAILTO="" and redirect output with `>> logfile 2>&1` Delete cron service Use normal Gmail password

Explanation: Set `MAILTO=""` to disable email and redirect output/errors to a log file.

Question 22 Not answered

Which method can send output to both a log file and cron email?

Use `chmod 777` Use `rm -rf` Use `lsblk` Use `tee -a`

Explanation: `tee -a` writes output to a file and also passes it along, allowing cron to email it.

Question 23 Not answered

Which command tests the `mail` command after msmtp direct testing works?

mail --install gmail crontab -r echo "Hello from mail command" | mail -s "Mail Test" user@gmail.com systemctl restart gmail

Explanation: This sends a test email using the `mail` command with a subject.

Question 24 Not answered

Which command edits the user's crontab to set MAILTO?

crontab -e sudo vim /etc/msmtprc cat /var/log/msmtp.log which msmtp

Explanation: `crontab -e` edits the current user's crontab where MAILTO can be set.

Question 25 Not answered

What proved the lab was successful?

The system rebooted Emails arrived from msmtp direct test, mail command test, and cron MAILTO test The App Password was pasted into chat The backup script was deleted

Explanation: Receiving all three emails proves Gmail SMTP, msmtp, mail, and cron MAILTO are working.

Result