Using the forever module of nodejs, no related files are generated after adding-o

as mentioned, I tried to use forever to manage some js scripts on my local (MacBook15, system 10.13.3) and server (CentOS 7), but I found that no new files were ever generated.

for example, there is a test.js:

here.
console.log("begin test..")

setInterval(()=>{
    console.log(Date.now(), ":test point...")
},10000)

then forever start test.js-o test.log my understanding is that a test.log log file will be generated in this directory to record console.log information, but it doesn"t.

so I would like to ask you, is it my wrong understanding of the usage, or is there something wrong with the way I use it?

Mar.09,2021
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b36289-2bffa.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b36289-2bffa.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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