Logger (command)

Linux (bsdutils package) and most BSDs including MacOS provide logger command line utility to send messages to syslog, locally or to a remote syslog server. Many languages provide support for writing messages to syslog, such as go: https://godoc.org/github.com/spkg/slog.

Basic Usage

• logger -s "Message"

-s, --stderr Output the message to standard error as well as to the system log.

logger --server 10.10.x.x  "TEST"

• echo "MY TEXT TO LOG" | logger -s

-s, --stderr Output the message to standard error as well as to the system log.

logger -n SERVER.DOMAIN.COM -T  "TEST
logger: failed to resolve name SERVER.DOMAIN.COM port syslog-conn: Servname not supported for ai_socktype

 logger -n SERVER.DOMAIN.COM -T -P 514 "TEST

Activities

1. Log messages to a different file using rsyslog and logger command

Related terms

• systemd-cat
• rfc3164
• rsyslog.conf
• logger (Python)

See also

• log show in MacOS
• journalctl
• Standard streams: /dev/stdin, /dev/stdout, /dev/stderr, /dev/null, File descriptor, set -x, 2>&1, stdbuf
• echo, print, printf, tput, logger, write-output, echo -e, /dev/stdout, banner
• Linux logging, Cisco IOS logging

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Original Source: https://en.wikiversity.org/wiki/Linux_Administration/System_Services/System_Logging/logger