With the below command ,all stderr and stdout redirect into /tmp/ss.log and it perform in background process.
python sslocal -c /etc/shadowsocks.json > /tmp/ss.log 2>&1 & Now to redirect stderr and stdout into /var/log directory as following.
python sslocal -c /etc/shadowsocks.json > /var/log/ss.log 2>&1 & bash: /var/log/ss.log: Permission denied It encounter permission problem.
I made a try with sudo tee as following.
python sslocal -c /etc/shadowsocks.json |sudo tee -a /var/log/ss.log 2>&1 & python sslocal -c /etc/shadowsocks.json 2>&1|sudo tee -a /var/log/ss.log & nohup python sslocal -c /etc/shadowsocks.json |sudo tee -a /var/log/ss.log 2>&1 & nohup python sslocal -c /etc/shadowsocks.json 2>&1|sudo tee -a /var/log/ss.log & All of them encounter another problem,the command can't run in background process,it run as foreground process.
How to redirect stderr and stdout into /var/log directory in background process?
3 Answers
Answers 1
Just invoke the redirection as root:
sudo sh -c 'python sslocal -c /etc/shadowsocks.json > /var/log/ss.log 2>&1' & Answers 2
Although you try to redirect stdout / stderr using bash redirection, I may add another alternative: Redirect within your code:
import sys sys.stdout = open(stdout.log, 'w') sys.stderr = open(stderr.log, 'w') You just need to execute this code during application startup and all the output (stdout, and stderr) will be written to the defined log files.
Answers 3
sudo vi /etc/systemd/system/ss.service [Unit] Description=ss [Service] TimeoutStartSec=0 ExecStart=/bin/bash -c '/python sslocal -c /etc/ss.json 2>&1 > /var/log/ss.log 2>&1' [Install] WantedBy=multi-user.target To start it after editing the config file.
sudo systemctl daemon-reload sudo systemctl enable ss.service sudo systemctl start ss.service sudo systemctl status ss -l 1.ss run as a service and it start in reboot automatically.
2.ss can write log into /var/log/ss.log without permission problem.
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