1SYSTEMD-CAT(1) systemd-cat SYSTEMD-CAT(1)
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6 systemd-cat - Connect a pipeline or program's output with the journal
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9 systemd-cat [OPTIONS...] [COMMAND] [ARGUMENTS...]
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11 systemd-cat [OPTIONS...]
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14 systemd-cat may be used to connect the standard input and output of a
15 process to the journal, or as a filter tool in a shell pipeline to pass
16 the output the previous pipeline element generates to the journal.
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18 If no parameter is passed, systemd-cat will write everything it reads
19 from standard input (stdin) to the journal.
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21 If parameters are passed, they are executed as command line with
22 standard output (stdout) and standard error output (stderr) connected
23 to the journal, so that all it writes is stored in the journal.
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26 The following options are understood:
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28 -h, --help
29 Print a short help text and exit.
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31 --version
32 Print a short version string and exit.
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34 -t, --identifier=
35 Specify a short string that is used to identify the logging tool.
36 If not specified, no identification string is written to the
37 journal.
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39 -p, --priority=
40 Specify the default priority level for the logged messages. Pass
41 one of "emerg", "alert", "crit", "err", "warning", "notice",
42 "info", "debug", or a value between 0 and 7 (corresponding to the
43 same named levels). These priority values are the same as defined
44 by syslog(3). Defaults to "info". Note that this simply controls
45 the default, individual lines may be logged with different levels
46 if they are prefixed accordingly. For details, see --level-prefix=
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49 --level-prefix=
50 Controls whether lines read are parsed for syslog priority level
51 prefixes. If enabled (the default), a line prefixed with a priority
52 prefix such as "<5>" is logged at priority 5 ("notice"), and
53 similar for the other priority levels. Takes a boolean argument.
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56 On success, 0 is returned, a non-zero failure code otherwise.
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59 Example 1. Invoke a program
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61 This calls /bin/ls with standard output and error connected to the
62 journal:
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64 # systemd-cat ls
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66 Example 2. Usage in a shell pipeline
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68 This builds a shell pipeline also invoking /bin/ls and writes the
69 output it generates to the journal:
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71 # ls | systemd-cat
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73 Even though the two examples have very similar effects the first is
74 preferable since only one process is running at a time, and both stdout
75 and stderr are captured while in the second example, only stdout is
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79 systemd(1), systemctl(1), logger(1)
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83systemd 239 SYSTEMD-CAT(1)