trusty (1) systemd-cat.1.gz

NAME

       systemd-cat - Connect a pipeline or program's output with the journal

SYNOPSIS

       systemd-cat [OPTIONS...] [COMMAND] [ARGUMENTS...]

       systemd-cat [OPTIONS...]

DESCRIPTION

       systemd-cat may be used to connect STDOUT and STDERR of a process with the journal, or as a filter tool
       in a shell pipeline to pass the output the previous pipeline element generates to the journal.

       If no parameter is passed systemd-cat will write everything it reads from standard input (STDIN) to the
       journal.

       If parameters are passed they are executed as command line with standard output (STDOUT) and standard
       error output (STDERR) connected to the journal, so that all it writes is stored in the journal.

OPTIONS

       The following options are understood:

       -h, --help
           Prints a short help text and exits.

       --version
           Prints a short version string and exits.

       -t, --identifier=
           Specify a short string that is used to identify the logging tool. If not specified no identifying
           string is written to the journal.

       -p, --priority=
           Specify the default priority level for the logged messages. Pass one of emerg, alert, crit, err,
           warning, notice, info, debug, or a value between 0 and 7 (corresponding to the same named levels).
           These priority values are the same as defined by syslog(3). Defaults to info. Note that this simply
           controls the default, individual lines may be logged with different levels if they are prefixed
           accordingly. For details see --level-prefix= below.

       --level-prefix=
           Controls whether lines read are parsed for syslog priority level prefixes. If enabled (the default) a
           line prefixed with a priority prefix such as <5> is logged at priority 5 (notice), and similar for
           the other priority levels. Takes a boolean argument.

EXIT STATUS

       On success 0 is returned, a non-zero failure code otherwise.

EXAMPLES

       Example 1. Invoke a program

       This calls /bin/ls with STDOUT/STDERR connected to the journal:

           # systemd-cat ls

       Example 2. Usage in a shell pipeline

       This builds a shell pipeline also invoking /bin/ls and writes the output it generates to the journal:

           # ls | systemd-cat

       Even though the two examples have very similar effects the first is preferable since only one process is
       running at a time, and both STDOUT and STDERR are captured while in the second example only STDOUT is
       captured.

SEE ALSO

       systemd(1), systemctl(1), logger(1)