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Combining tail && journalctl
Forward logs from file to journaldStop tailing logClear terminal window before tail -f outputdoes journalctl eliminate the need for most logging?How to view stderr log only with journalctl?Application log files to the systemd journalWhy journalctl does not display log message if I use filtering by unit?Bypass systemd-journald to send messages directly to ryslog daemonHow to continuously tail a log, find all files (sed), and display (cat) the found filesrsyslog: send logs to different file using custom templateGetting systemd service logs faster from my service
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I'm tailing logs of my own app and postgres.
tail -f /tmp/myapp.log /var/log/postgresql/postgresql.main.log
I need to include pgpool's logs. It used to be syslog but now it is in journalctl.
Is there a way to tie tail -f && journalctl -f together?
systemd tail journalctl
edited Oct 7 '16 at 14:34
Jeff Schaller♦
44.7k1162145
asked Oct 7 '16 at 14:25
bikeybikey
71114
add a comment |
I'm tailing logs of my own app and postgres.
tail -f /tmp/myapp.log /var/log/postgresql/postgresql.main.log
I need to include pgpool's logs. It used to be syslog but now it is in journalctl.
Is there a way to tie tail -f && journalctl -f together?
systemd tail journalctl
edited Oct 7 '16 at 14:34
Jeff Schaller♦
44.7k1162145
asked Oct 7 '16 at 14:25
bikeybikey
71114
add a comment |
I'm tailing logs of my own app and postgres.
tail -f /tmp/myapp.log /var/log/postgresql/postgresql.main.log
I need to include pgpool's logs. It used to be syslog but now it is in journalctl.
Is there a way to tie tail -f && journalctl -f together?
systemd tail journalctl
edited Oct 7 '16 at 14:34
Jeff Schaller♦
44.7k1162145
asked Oct 7 '16 at 14:25
bikeybikey
71114
I'm tailing logs of my own app and postgres.
tail -f /tmp/myapp.log /var/log/postgresql/postgresql.main.log
I need to include pgpool's logs. It used to be syslog but now it is in journalctl.
Is there a way to tie tail -f && journalctl -f together?
systemd tail journalctl
systemd tail journalctl
edited Oct 7 '16 at 14:34
Jeff Schaller♦
44.7k1162145
asked Oct 7 '16 at 14:25
bikeybikey
71114
edited Oct 7 '16 at 14:34
Jeff Schaller♦
44.7k1162145
asked Oct 7 '16 at 14:25
bikeybikey
71114
edited Oct 7 '16 at 14:34
Jeff Schaller♦
44.7k1162145
edited Oct 7 '16 at 14:34
Jeff Schaller♦
44.7k1162145
edited Oct 7 '16 at 14:34
Jeff Schaller♦
44.7k1162145
44.7k1162145
asked Oct 7 '16 at 14:25
bikeybikey
71114
asked Oct 7 '16 at 14:25
bikeybikey
71114
asked Oct 7 '16 at 14:25
bikeybikey
71114
71114
add a comment |
add a comment |
4 Answers
4
active
oldest
votes
You could forward your log entries to journal:
systemd-cat tail -f /tmp/myapp.log /var/log/postgresql.log
and then use journalctl -f... though as Mark mentioned, that will print all journal entries.
One way to filter only the messages from those logs and from that particular unit is to use a distinct SYSLOG_IDENTIFIER i.e. edit the unit file and under the [Service] section add e.g.
SyslogIdentifier=my_stuff
restart the unit then run systemd-cat with the same identifier
systemd-cat -t my_stuff tail -f /tmp/myapp.log /var/log/postgresql.log
and finally query the journal only for that particular identifier:
journalctl -f -t my_stuff
answered Apr 23 '17 at 15:12
don_crisstidon_crissti
51.8k15141168
add a comment |
If you have bash available, you can use process substitution as one of the tail parameters:
tail -f /tmp/myapp.log /var/log/postgresql/postgresql.main.log <(journalctl -f)
answered Oct 7 '16 at 14:37
Jeff Schaller♦Jeff Schaller
44.7k1162145
This is the elegant way I also tried, but is doesn't work. Tail shows that it's using /dev/fd/xx, but no logs are displayed.
– bikey
Oct 7 '16 at 15:12
correct; /dev/fd/xxx is the temporary pipe that bash uses in order to implement the process substitution; any journalctl output will show up in there.
– Jeff Schaller♦
Oct 7 '16 at 15:13
4
You probably don't want to follow the whole journal but just those for the pgpool unit. Assuming the service namedpgpool.service, tryjournalctl -fu pgpool.service. Also, if you are not running this as root, make sure the user is in thesystemd-journalgroup!
– Mark Stosberg
Oct 10 '16 at 13:50
add a comment |
try something like:
tail -f /tmp/myapp.log >> /tmp/tail.log &
journalctl -f >> /tmp/tail.log &
tail -f /tmp/tail.log
edited Apr 23 '17 at 12:58
Jeff Schaller♦
44.7k1162145
answered Oct 7 '16 at 14:33
PaulPaul
115
add a comment |
You could use:
journalctl -u service-name -f
-f, --follow
Show only the most recent journal entries, and continuously print new entries as they are appended to the journal.
Here I've added "service-name" to distinguish this answer from others; you substitute the actual service name instead of the text service-name.
edited 2 days ago
Jeff Schaller♦
44.7k1162145
answered 2 days ago
TouficToufic
1
New contributor
Toufic is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
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4 Answers
4
active
oldest
votes
4 Answers
4
active
oldest
votes
active
oldest
votes
active
oldest
votes
You could forward your log entries to journal:
systemd-cat tail -f /tmp/myapp.log /var/log/postgresql.log
and then use journalctl -f... though as Mark mentioned, that will print all journal entries.
One way to filter only the messages from those logs and from that particular unit is to use a distinct SYSLOG_IDENTIFIER i.e. edit the unit file and under the [Service] section add e.g.
SyslogIdentifier=my_stuff
restart the unit then run systemd-cat with the same identifier
systemd-cat -t my_stuff tail -f /tmp/myapp.log /var/log/postgresql.log
and finally query the journal only for that particular identifier:
journalctl -f -t my_stuff
answered Apr 23 '17 at 15:12
don_crisstidon_crissti
51.8k15141168
add a comment |
You could forward your log entries to journal:
systemd-cat tail -f /tmp/myapp.log /var/log/postgresql.log
and then use journalctl -f... though as Mark mentioned, that will print all journal entries.
One way to filter only the messages from those logs and from that particular unit is to use a distinct SYSLOG_IDENTIFIER i.e. edit the unit file and under the [Service] section add e.g.
SyslogIdentifier=my_stuff
restart the unit then run systemd-cat with the same identifier
systemd-cat -t my_stuff tail -f /tmp/myapp.log /var/log/postgresql.log
and finally query the journal only for that particular identifier:
journalctl -f -t my_stuff
answered Apr 23 '17 at 15:12
don_crisstidon_crissti
51.8k15141168
add a comment |
You could forward your log entries to journal:
systemd-cat tail -f /tmp/myapp.log /var/log/postgresql.log
and then use journalctl -f... though as Mark mentioned, that will print all journal entries.
One way to filter only the messages from those logs and from that particular unit is to use a distinct SYSLOG_IDENTIFIER i.e. edit the unit file and under the [Service] section add e.g.
SyslogIdentifier=my_stuff
restart the unit then run systemd-cat with the same identifier
systemd-cat -t my_stuff tail -f /tmp/myapp.log /var/log/postgresql.log
and finally query the journal only for that particular identifier:
journalctl -f -t my_stuff
answered Apr 23 '17 at 15:12
don_crisstidon_crissti
51.8k15141168
You could forward your log entries to journal:
systemd-cat tail -f /tmp/myapp.log /var/log/postgresql.log
and then use journalctl -f... though as Mark mentioned, that will print all journal entries.
One way to filter only the messages from those logs and from that particular unit is to use a distinct SYSLOG_IDENTIFIER i.e. edit the unit file and under the [Service] section add e.g.
SyslogIdentifier=my_stuff
restart the unit then run systemd-cat with the same identifier
systemd-cat -t my_stuff tail -f /tmp/myapp.log /var/log/postgresql.log
and finally query the journal only for that particular identifier:
journalctl -f -t my_stuff
answered Apr 23 '17 at 15:12
don_crisstidon_crissti
51.8k15141168
answered Apr 23 '17 at 15:12
don_crisstidon_crissti
51.8k15141168
answered Apr 23 '17 at 15:12
don_crisstidon_crissti
51.8k15141168
answered Apr 23 '17 at 15:12
don_crisstidon_crissti
51.8k15141168
51.8k15141168
add a comment |
add a comment |
If you have bash available, you can use process substitution as one of the tail parameters:
tail -f /tmp/myapp.log /var/log/postgresql/postgresql.main.log <(journalctl -f)
answered Oct 7 '16 at 14:37
Jeff Schaller♦Jeff Schaller
44.7k1162145
This is the elegant way I also tried, but is doesn't work. Tail shows that it's using /dev/fd/xx, but no logs are displayed.
– bikey
Oct 7 '16 at 15:12
correct; /dev/fd/xxx is the temporary pipe that bash uses in order to implement the process substitution; any journalctl output will show up in there.
– Jeff Schaller♦
Oct 7 '16 at 15:13
4
You probably don't want to follow the whole journal but just those for the pgpool unit. Assuming the service namedpgpool.service, tryjournalctl -fu pgpool.service. Also, if you are not running this as root, make sure the user is in thesystemd-journalgroup!
– Mark Stosberg
Oct 10 '16 at 13:50
add a comment |
If you have bash available, you can use process substitution as one of the tail parameters:
tail -f /tmp/myapp.log /var/log/postgresql/postgresql.main.log <(journalctl -f)
answered Oct 7 '16 at 14:37
Jeff Schaller♦Jeff Schaller
44.7k1162145
This is the elegant way I also tried, but is doesn't work. Tail shows that it's using /dev/fd/xx, but no logs are displayed.
– bikey
Oct 7 '16 at 15:12
correct; /dev/fd/xxx is the temporary pipe that bash uses in order to implement the process substitution; any journalctl output will show up in there.
– Jeff Schaller♦
Oct 7 '16 at 15:13
4
You probably don't want to follow the whole journal but just those for the pgpool unit. Assuming the service namedpgpool.service, tryjournalctl -fu pgpool.service. Also, if you are not running this as root, make sure the user is in thesystemd-journalgroup!
– Mark Stosberg
Oct 10 '16 at 13:50
add a comment |
If you have bash available, you can use process substitution as one of the tail parameters:
tail -f /tmp/myapp.log /var/log/postgresql/postgresql.main.log <(journalctl -f)
answered Oct 7 '16 at 14:37
Jeff Schaller♦Jeff Schaller
44.7k1162145
If you have bash available, you can use process substitution as one of the tail parameters:
tail -f /tmp/myapp.log /var/log/postgresql/postgresql.main.log <(journalctl -f)
answered Oct 7 '16 at 14:37
Jeff Schaller♦Jeff Schaller
44.7k1162145
answered Oct 7 '16 at 14:37
Jeff Schaller♦Jeff Schaller
44.7k1162145
answered Oct 7 '16 at 14:37
Jeff Schaller♦Jeff Schaller
44.7k1162145
answered Oct 7 '16 at 14:37
Jeff Schaller♦Jeff Schaller
44.7k1162145
44.7k1162145
This is the elegant way I also tried, but is doesn't work. Tail shows that it's using /dev/fd/xx, but no logs are displayed.
– bikey
Oct 7 '16 at 15:12
correct; /dev/fd/xxx is the temporary pipe that bash uses in order to implement the process substitution; any journalctl output will show up in there.
– Jeff Schaller♦
Oct 7 '16 at 15:13
4
You probably don't want to follow the whole journal but just those for the pgpool unit. Assuming the service namedpgpool.service, tryjournalctl -fu pgpool.service. Also, if you are not running this as root, make sure the user is in thesystemd-journalgroup!
– Mark Stosberg
Oct 10 '16 at 13:50
add a comment |
This is the elegant way I also tried, but is doesn't work. Tail shows that it's using /dev/fd/xx, but no logs are displayed.
– bikey
Oct 7 '16 at 15:12
correct; /dev/fd/xxx is the temporary pipe that bash uses in order to implement the process substitution; any journalctl output will show up in there.
– Jeff Schaller♦
Oct 7 '16 at 15:13
4
You probably don't want to follow the whole journal but just those for the pgpool unit. Assuming the service namedpgpool.service, tryjournalctl -fu pgpool.service. Also, if you are not running this as root, make sure the user is in thesystemd-journalgroup!
– Mark Stosberg
Oct 10 '16 at 13:50
This is the elegant way I also tried, but is doesn't work. Tail shows that it's using /dev/fd/xx, but no logs are displayed.
– bikey
Oct 7 '16 at 15:12
This is the elegant way I also tried, but is doesn't work. Tail shows that it's using /dev/fd/xx, but no logs are displayed.
– bikey
Oct 7 '16 at 15:12
correct; /dev/fd/xxx is the temporary pipe that bash uses in order to implement the process substitution; any journalctl output will show up in there.
– Jeff Schaller♦
Oct 7 '16 at 15:13
correct; /dev/fd/xxx is the temporary pipe that bash uses in order to implement the process substitution; any journalctl output will show up in there.
– Jeff Schaller♦
Oct 7 '16 at 15:13
4
4
You probably don't want to follow the whole journal but just those for the pgpool unit. Assuming the service named
pgpool.service, try journalctl -fu pgpool.service. Also, if you are not running this as root, make sure the user is in the systemd-journal group!– Mark Stosberg
Oct 10 '16 at 13:50
You probably don't want to follow the whole journal but just those for the pgpool unit. Assuming the service named
pgpool.service, try journalctl -fu pgpool.service. Also, if you are not running this as root, make sure the user is in the systemd-journal group!– Mark Stosberg
Oct 10 '16 at 13:50
add a comment |
try something like:
tail -f /tmp/myapp.log >> /tmp/tail.log &
journalctl -f >> /tmp/tail.log &
tail -f /tmp/tail.log
edited Apr 23 '17 at 12:58
Jeff Schaller♦
44.7k1162145
answered Oct 7 '16 at 14:33
PaulPaul
115
add a comment |
try something like:
tail -f /tmp/myapp.log >> /tmp/tail.log &
journalctl -f >> /tmp/tail.log &
tail -f /tmp/tail.log
edited Apr 23 '17 at 12:58
Jeff Schaller♦
44.7k1162145
answered Oct 7 '16 at 14:33
PaulPaul
115
add a comment |
try something like:
tail -f /tmp/myapp.log >> /tmp/tail.log &
journalctl -f >> /tmp/tail.log &
tail -f /tmp/tail.log
edited Apr 23 '17 at 12:58
Jeff Schaller♦
44.7k1162145
answered Oct 7 '16 at 14:33
PaulPaul
115
try something like:
tail -f /tmp/myapp.log >> /tmp/tail.log &
journalctl -f >> /tmp/tail.log &
tail -f /tmp/tail.log
edited Apr 23 '17 at 12:58
Jeff Schaller♦
44.7k1162145
answered Oct 7 '16 at 14:33
PaulPaul
115
edited Apr 23 '17 at 12:58
Jeff Schaller♦
44.7k1162145
edited Apr 23 '17 at 12:58
Jeff Schaller♦
44.7k1162145
edited Apr 23 '17 at 12:58
Jeff Schaller♦
44.7k1162145
44.7k1162145
answered Oct 7 '16 at 14:33
PaulPaul
115
answered Oct 7 '16 at 14:33
PaulPaul
115
answered Oct 7 '16 at 14:33
PaulPaul
115
115
add a comment |
add a comment |
You could use:
journalctl -u service-name -f
-f, --follow
Show only the most recent journal entries, and continuously print new entries as they are appended to the journal.
Here I've added "service-name" to distinguish this answer from others; you substitute the actual service name instead of the text service-name.
edited 2 days ago
Jeff Schaller♦
44.7k1162145
answered 2 days ago
TouficToufic
1
New contributor
Toufic is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
You could use:
journalctl -u service-name -f
-f, --follow
Show only the most recent journal entries, and continuously print new entries as they are appended to the journal.
Here I've added "service-name" to distinguish this answer from others; you substitute the actual service name instead of the text service-name.
edited 2 days ago
Jeff Schaller♦
44.7k1162145
answered 2 days ago
TouficToufic
1
New contributor
Toufic is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
You could use:
journalctl -u service-name -f
-f, --follow
Show only the most recent journal entries, and continuously print new entries as they are appended to the journal.
Here I've added "service-name" to distinguish this answer from others; you substitute the actual service name instead of the text service-name.
edited 2 days ago
Jeff Schaller♦
44.7k1162145
answered 2 days ago
TouficToufic
1
New contributor
Toufic is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
You could use:
journalctl -u service-name -f
-f, --follow
Show only the most recent journal entries, and continuously print new entries as they are appended to the journal.
Here I've added "service-name" to distinguish this answer from others; you substitute the actual service name instead of the text service-name.
edited 2 days ago
Jeff Schaller♦
44.7k1162145
answered 2 days ago
TouficToufic
1
New contributor
Toufic is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 2 days ago
Jeff Schaller♦
44.7k1162145
edited 2 days ago
Jeff Schaller♦
44.7k1162145
edited 2 days ago
Jeff Schaller♦
44.7k1162145
44.7k1162145
answered 2 days ago
TouficToufic
1
New contributor
Toufic is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
answered 2 days ago
TouficToufic
1
answered 2 days ago
TouficToufic
1
1
New contributor
Toufic is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Toufic is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Toufic is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
add a comment |
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