Visit Our UNIX and Linux User Community

Linux and UNIX Man Pages

Test Your Knowledge in Computers #263
Difficulty: Easy
Alan Turing played a key role in cracking intercepted coded messages that enabled the Allies to defeat the Nazis in many crucial engagements, including the Battle of the Atlantic, and in so doing helped win and end the war.
True or False?
Linux & Unix Commands - Search Man Pages

logger(1) [centos man page]

LOGGER(1)							   User Commands							 LOGGER(1)

NAME
logger - a shell command interface to the syslog(3) system log module SYNOPSIS
logger [options] [message] DESCRIPTION
logger makes entries in the system log. It provides a shell command interface to the syslog(3) system log module. OPTIONS
-n, --server server Write to the specified remote syslog server instead of to the builtin syslog routines. Unless --udp or --tcp is specified the log- ger will first try to use UDP, but if it fails a TCP connection is attempted. -d, --udp Use datagram (UDP) only. By default the connection is tried to syslog port defined in /etc/services, which is often 514. -T, --tcp Use stream (TCP) only. By default the connection is tried to syslog-conn port defined in /etc/services, which is often 601. -P, --port port Use the specified port. -i, --id Log the process ID of the logger process with each line. -f, --file file Log the contents of the specified file. This option cannot be combined with a command-line message. -h, --help Display a help text and exit. -p, --priority priority Enter the message into the log with the specified priority. The priority may be specified numerically or as a facility.level pair. For example, -p local3.info logs the message as informational in the local3 facility. The default is user.notice. -s, --stderr Output the message to standard error as well as to the system log. -t, --tag tag Mark every line to be logged with the specified tag. -u, --socket socket Write to the specified socket instead of to the builtin syslog routines. -V, --version Display version information and exit. -- End the argument list. This is to allow the message to start with a hyphen (-). message Write the message to log; if not specified, and the -f flag is not provided, standard input is logged. The logger utility exits 0 on success, and >0 if an error occurs. Valid facility names are: auth, authpriv (for security information of a sensitive nature), cron, daemon, ftp, kern (can't be generated from user process), lpr, mail, news, security (deprecated synonym for auth), syslog, user, uucp, and local0 to local7, inclusive. Valid level names are: alert, crit, debug, emerg, err, error (deprecated synonym for err), info, notice, panic (deprecated synonym for emerg), warning, warn (deprecated synonym for warning). For the priority order and intended purposes of these levels, see syslog(3). EXAMPLES
logger System rebooted logger -p local0.notice -t HOSTIDM -f /dev/idmc logger -n loghost.example.com System rebooted SEE ALSO
syslog(3), syslogd(8) STANDARDS
The logger command is expected to be IEEE Std 1003.2 ("POSIX.2") compatible. AVAILABILITY
The logger command is part of the util-linux package and is available from Linux Kernel Archive <ftp://ftp.kernel.org/pub/linux/utils/util- linux/>. util-linux April 2013 LOGGER(1)

Check Out this Related Man Page

logger(1B)					     SunOS/BSD Compatibility Package Commands						logger(1B)

NAME
logger - add entries to the system log SYNOPSIS
/usr/ucb/logger [-f filename] [-i] [-p priority] [-t tag] mm [message]... DESCRIPTION
The logger utility provides a method for adding one-line entries to the system log file from the command line. One or more message argu- ments can be given on the command line, in which case each is logged immediately. If message is unspecified, either the file indicated with -f or the standard input is added to the log. Otherwise, a filename can be specified, in which case each line in the file is logged. If neither is specified, logger reads and logs messages on a line-by-line basis from the standard input. OPTIONS
The following options are supported: -i Log the process ID of the logger process with each line. -f filename Use the contents of filename as the message to log. -p priority Enter the message with the specified priority. The message priority can be specified numerically, or as a facility.level pair. For example, `-p local3.info' assigns the message priority to the info level in the local3 facility. The default pri- ority is user.notice. -t tag Mark each line added to the log with the specified tag. EXAMPLES
Example 1: Logging a message The command: example% logger System rebooted will log the message `System rebooted' to the facility at priority notice to be treated by syslogd as other messages to the facility notice are. Example 2: Logging messages from a file The command: example% logger -p local0.notice -t HOSTIDM -f /dev/idmc will read from the file /dev/idmc and will log each line in that file as a message with the tag `HOSTIDM' at priority notice to be treated by syslogd as other messages to the facility local0 are. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWscpu | +-----------------------------+-----------------------------+ SEE ALSO
syslogd(1M), syslog(3C), attributes(5) SunOS 5.10 14 Sep 1992 logger(1B)

Featured Tech Videos