python - Why can't record log with option --log-file in ssserver? - 


pip install  shadowsocks

and set configuration in /etc/shadowsocks.json . 

sudo ssserver -h |grep log   --log-file log_file    log file daemon mode

i want record log shadowsocks server in /home/user/ss.log.
let's create ssserver daemon.

format1:

sudo vim   /etc/systemd/system/ss.service [unit] description=shadowsocks after=network.target  [service] user=root execstart=/usr/bin/python   /usr/local/bin/ssserver  -c /etc/shadowsocks.json --log-file  /home/user/ss.log  [install] wantedby=multi-user.target  sudo  systemctl daemon-reload sudo systemctl restart  ss

no record in /home/user/ss.log after many web page opened via shadowsocks.
bug argument --log-file in ssserver or not?
no use write :

execstart=/usr/bin/python   /usr/local/bin/ssserver --log-file  /home/user/ss.log  -c /etc/shadowsocks.json

format2: 

sudo vim   /etc/systemd/system/ss.service [unit] description=shadowsocks after=network.target  [service] user=root standardoutput=journal standarderror=journal execstart=/usr/bin/python /usr/local/bin/ssserver -c /etc/shadowsocks.json    [install] wantedby=multi-user.target

to check log command sudo journalctl -u ss.

format3:

sudo vim   /etc/systemd/system/ss.service [unit] description=shadowsocks after=network.target  [service] user=root execstart=/bin/bash -c "/usr/bin/python /usr/local/bin/ssserver -c /etc/shadowsocks.json >/home/user/ss.log  2>&1"   [install] wantedby=multi-user.target

it verified format2 , format3 can work properly,my puzzles is:
why format1 can't work?


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