logger:tldr:fcd6c

The command "echo ${log_entry} | logger" is used to send a log entry to the system logger.

Here's what each part of the command does:

1. "echo ${log_entry}": The "echo" command is used to display text or variables on the command line. In this case, it displays the value of the "log_entry" variable. The "$" before "log_entry" is used to reference the value of the variable.

2. "|": The "|" symbol is called a pipe operator. It is used to redirect the output of the command on the left side of the pipe to the input of the command on the right side of the pipe.

3. "logger": The "logger" command is a system utility that allows you to send log messages to the system logger. It is commonly used in shell scripts to write log entries for various purposes.

Combining all the parts, when the command "echo ${log_entry} | logger" is executed, it takes the value of the "log_entry" variable, sends it as input to the "logger" command, and subsequently logs the entry using the system logger.