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# logger
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## 说明
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**logger命令** 是用于往系统中写入日志，他提供一个shell命令接口到syslog系统模块
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## 选项
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```markdown
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-T, --tcp 只使用 TCP
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-d, --udp 只使用 UDP
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-i, --id 同时记录进程 ID
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-f, --file <文件> 记录此文件的内容
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-h, --help 显示此帮助并退出
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-S, --size <num> maximum size for a single message (default 1024)
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-n, --server <name> write to this remote syslog server
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-P, --port <port> use this port for UDP or TCP connection
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-p, --priority <prio> mark given message with this priority
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-s, --stderr output message to standard error as well
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-t, --tag <标志> 用此标志标记每一行
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-u, --socket <套接字> 写入此 Unix 套接字
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```
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## 实例
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```bash
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logger -p syslog.info "backup.sh is starting"
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```
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