logger 命令用于将 Linux 日志写入系统日志
介绍
系统日志文件：
- CentOS/Redhat 写入
/var/log/message 文件中
- Ubuntu 写入
/var/log/syslog 文件中
安装
apt install bsdutils
help
$ logger --help
Usage:
logger [options] [<message>]
Enter messages into the system log.
Options:
-i log the logger command's PID
--id[=<id>] log the given <id>, or otherwise the PID
-f, --file <file> log the contents of this file
-e, --skip-empty do not log empty lines when processing files
--no-act do everything except the write the log
-p, --priority <prio> mark given message with this priority
--octet-count use rfc6587 octet counting
--prio-prefix look for a prefix on every line read from stdin
-s, --stderr output message to standard error as well
-S, --size <size> maximum size for a single message
-t, --tag <tag> mark every line with this tag
-n, --server <name> write to this remote syslog server
-P, --port <port> use this port for UDP or TCP connection
-T, --tcp use TCP only
-d, --udp use UDP only
--rfc3164 use the obsolete BSD syslog protocol
--rfc5424[=<snip>] use the syslog protocol (the default for remote);
<snip> can be notime, or notq, and/or nohost
--sd-id <id> rfc5424 structured data ID
--sd-param <data> rfc5424 structured data name=value
--msgid <msgid> set rfc5424 message id field
-u, --socket <socket> write to this Unix socket
--socket-errors[=<on|off|auto>]
print connection errors when using Unix sockets
--journald[=<file>] write journald entry
-h, --help display this help
-V, --version display version
For more details see logger(1).
使用示例
logger -h
man logger
logger "This is just a simple log line"
# -p 指定输入消息日志级别
logger -p "local3.info" "This is just a simple log line"
# to syslog
logger -n 192.168.1.10 "This is just a simple log line"
logger -n 192.168.1.10 -P 1514 "This is just a simple log line"
# to syslog use tcp
logger -n 192.168.1.10 -T "This is just a simple log line"
# -i 指定进程id；-t 指定模块名；-s 输出标准错误
logger -i -t xxxx -s "This is just a simple log line"