root@armadillo:~# ls /dev/ttyACM* /dev/ttyACM0 /dev/ttyACM1 root@armadillo:~# sudo LANG=C systemctl status system_init_test.service [0;1;31m*.[0m system_init_test.service - system_init_test daemon.[m Loaded: loaded (/etc/systemd/system/system_init_test.service; enabled; vendor.[m Active: .[0;1;31mfailed.[0m (Result: exit-code) since Wed 2021-12-15 16:59:01 JST; 49s ago.[m Process: 546 ExecStart=/root/system_init_test.sh .[0;1;31m(code=exited, status=1/FAILUR.[m.. Main PID: 546 (code=exited, status=1/FAILURE).[m [m Dec 15 16:59:01 armadillo systemd[1]: .[0;1;39msystem_init_test.service: Failed with resu.[m Dec 15 16:59:01 armadillo systemd[1]: system_init_test.service: Service hold-off.[m..Dec 15 16:59:01 armadillo systemd[1]: Stopped system_init_test daemon..[m Dec 15 16:59:01 armadillo systemd[1]: .[0;1;39msystem_init_test.service: Start request re.[m Dec 15 16:59:01 armadillo systemd[1]: .[0;1;31mFailed to start system_init_test daemon..[0m.[m Dec 15 16:59:01 armadillo systemd[1]: .[0;1;39msystem_init_test.service: Unit entered fai.[m Dec 15 16:59:01 armadillo systemd[1]: .[0;1;39msystem_init_test.service: Failed with resu.[m [7mlines 1-13/13 (END).[27m.[K[ 64.416784] random: crng init done [ 64.420228] random: 6 urandom warning(s) missed due to ratelimiting