mailx:tldr:f36aa

This command is used to send an email using the mailx command line utility. Let's break it down:

1. echo "${content}": This part echoes the value of the variable ${content}. The echo command displays the contents of ${content} in the standard output.

2. |: This is a pipe symbol that connects the output of the echo command to the input of the mailx command.

3. mailx -s "${subject}" ${to_addr}: This part invokes the mailx command with the following options:

   • -s "${subject}": The -s option is used to specify the email subject. "${subject}" is the value of the ${subject} variable.
   • ${to_addr}: This is the email address of the recipient. It could be an individual email address or multiple addresses separated by a comma.

Overall, this command takes the value of ${content} as the email body, ${subject} as the subject, and ${to_addr} as the recipient's address, and sends the email using the mailx utility.