journalctl查看systemctl启动日志及其他例子
# 1.先看状态 systemctl status app-scanner-update.service # 看到提示 active: failed (Result: exit-code),简短信息看不出根因 # 2.查看该服务全部历史日志(不实时) journalctl -u app-scanner-update.service # 3.只看本次系统开机后的服务日志 journalctl -u app-scanner-update.service -b # 4.开启实时监控,再重启复现故障 journalctl -u app-scanner-update.service -f # 另一个终端执行重启 systemctl restart app-scanner-update.service

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