![Forrest logo](/images/logo.png)
xe:tldr:0e0a8
The given command is a combination of two separate commands connected by a pipe(|):
-
echo -e 'a\nb'
: This command uses theecho
command with the-e
option to interpret escape sequences. It prints two lines, "a" and "b", each on a separate line. -
xe -N${2} -s 'echo $2 $1'
: This command uses a custom command or script calledxe
. The-N${2}
argument means that it takes an additional argument (let's assume it's the number 2) and assigns it to the variableN
within the script. The-s
option specifies that the following string should be executed as a script.
The script passed to xe
as an argument is 'echo $2 $1'
. It uses shell variables $1 and $2, where $1 refers to the first argument (a
) and $2 refers to the second argument (b
). Therefore, when the script is executed, it will output b a
since it echoes the second variable followed by the first variable.
In summary, this command prints "a" and "b" using echo
, and then xe
takes the second argument and executes a script that echoes the second argument followed by the first argument.