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mpg123:tldr:3c26e
This command is used to play an mp3 file using the mpg123
command-line audio player. Here's a breakdown of how it works:
-
cat
: This command is used to concatenate and display the content of files. In this case, it is used to read the content of the specified file. -
${file-mp3}
: This is a shell variable substitution. It attempts to expand the value of thefile
variable, and if it is not set or empty, it uses the string "mp3" as a default value. -
|
: This is the pipe symbol, which is used to redirect the output of one command as the input to another command. In this case, it takes the output ofcat ${file-mp3}
and passes it as input to thempg123
command. -
mpg123
: This is a command-line audio player for playing mp3 files. It takes the mp3 data from thecat
command and plays it.
In summary, this command concatenates the content of an mp3 file (specified by the variable file
or using "mp3" as default) and passes it as input to the mpg123
command, which will play it as audio.