Output print statement in python does not goes into cron log
my crontab looks like this:
@reboot sh /home/pi/LCDinterface/shutdownlauncher.sh 2>&1 | tee -a /home/cronlog
Content of shutdownlauncher.sh :
cd /
cd home/pi/LCDinterface
date
python shutdown.py
echo ''
cd /
Content of shutdown.py :
if interrupt_happens:
print ("shutting down")
time.sleep(3)
os.system("sudo shutdown -h now")
If I run python shutdown.py or sh shutdownlauncher.sh I can always see the output text 'shutting down' in my terminal. But If only cron starts running the bash script, which calls the python script. I never see the text, and it does not appear in the log. The date command in sh script appears in my log, but not in the terminal. Can you help me with that? How to edit the shutdownlauncher.sh or the cron job to see the outputs in the terminal, and in the log too? This whole thing runs on a Raspberry Pi 3, I am connected on SSH.
Content of my log file:
Fri Apr 7 19:26:33 CEST 2017
Fri Apr 7 19:36:11 CEST 2017
Fri Apr 7 21:18:45 CEST 2017
Sat Apr 8 00:08:09 CEST 2017
Sat Apr 8 00:29:31 CEST 2017
Sat Apr 8 10:08:17 CEST 2017
Sat Apr 8 11:58:35 CEST 2017
shell-script cron logs raspberry-pi stdout
edited Apr 8 '17 at 17:48
Jeff Schaller
41.5k1056132
asked Apr 8 '17 at 17:15
user3598726user3598726
1064
bumped to the homepage by Community♦ 1 min ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
add a comment |
my crontab looks like this:
@reboot sh /home/pi/LCDinterface/shutdownlauncher.sh 2>&1 | tee -a /home/cronlog
Content of shutdownlauncher.sh :
cd /
cd home/pi/LCDinterface
date
python shutdown.py
echo ''
cd /
Content of shutdown.py :
if interrupt_happens:
print ("shutting down")
time.sleep(3)
os.system("sudo shutdown -h now")
If I run python shutdown.py or sh shutdownlauncher.sh I can always see the output text 'shutting down' in my terminal. But If only cron starts running the bash script, which calls the python script. I never see the text, and it does not appear in the log. The date command in sh script appears in my log, but not in the terminal. Can you help me with that? How to edit the shutdownlauncher.sh or the cron job to see the outputs in the terminal, and in the log too? This whole thing runs on a Raspberry Pi 3, I am connected on SSH.
Content of my log file:
Fri Apr 7 19:26:33 CEST 2017
Fri Apr 7 19:36:11 CEST 2017
Fri Apr 7 21:18:45 CEST 2017
Sat Apr 8 00:08:09 CEST 2017
Sat Apr 8 00:29:31 CEST 2017
Sat Apr 8 10:08:17 CEST 2017
Sat Apr 8 11:58:35 CEST 2017
shell-script cron logs raspberry-pi stdout
edited Apr 8 '17 at 17:48
Jeff Schaller
41.5k1056132
asked Apr 8 '17 at 17:15
user3598726user3598726
1064
bumped to the homepage by Community♦ 1 min ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
Why would you want to runshutdownon boot? A@rebootcron-job runs when the machine is booting up.
– Kusalananda
Apr 8 '17 at 17:33
What "terminal" are you expecting the output to be shown on?
– terdon♦
Apr 8 '17 at 17:51
add a comment |
my crontab looks like this:
@reboot sh /home/pi/LCDinterface/shutdownlauncher.sh 2>&1 | tee -a /home/cronlog
Content of shutdownlauncher.sh :
cd /
cd home/pi/LCDinterface
date
python shutdown.py
echo ''
cd /
Content of shutdown.py :
if interrupt_happens:
print ("shutting down")
time.sleep(3)
os.system("sudo shutdown -h now")
If I run python shutdown.py or sh shutdownlauncher.sh I can always see the output text 'shutting down' in my terminal. But If only cron starts running the bash script, which calls the python script. I never see the text, and it does not appear in the log. The date command in sh script appears in my log, but not in the terminal. Can you help me with that? How to edit the shutdownlauncher.sh or the cron job to see the outputs in the terminal, and in the log too? This whole thing runs on a Raspberry Pi 3, I am connected on SSH.
Content of my log file:
Fri Apr 7 19:26:33 CEST 2017
Fri Apr 7 19:36:11 CEST 2017
Fri Apr 7 21:18:45 CEST 2017
Sat Apr 8 00:08:09 CEST 2017
Sat Apr 8 00:29:31 CEST 2017
Sat Apr 8 10:08:17 CEST 2017
Sat Apr 8 11:58:35 CEST 2017
shell-script cron logs raspberry-pi stdout
edited Apr 8 '17 at 17:48
Jeff Schaller
41.5k1056132
asked Apr 8 '17 at 17:15
user3598726user3598726
1064
my crontab looks like this:
@reboot sh /home/pi/LCDinterface/shutdownlauncher.sh 2>&1 | tee -a /home/cronlog
Content of shutdownlauncher.sh :
cd /
cd home/pi/LCDinterface
date
python shutdown.py
echo ''
cd /
Content of shutdown.py :
if interrupt_happens:
print ("shutting down")
time.sleep(3)
os.system("sudo shutdown -h now")
If I run python shutdown.py or sh shutdownlauncher.sh I can always see the output text 'shutting down' in my terminal. But If only cron starts running the bash script, which calls the python script. I never see the text, and it does not appear in the log. The date command in sh script appears in my log, but not in the terminal. Can you help me with that? How to edit the shutdownlauncher.sh or the cron job to see the outputs in the terminal, and in the log too? This whole thing runs on a Raspberry Pi 3, I am connected on SSH.
Content of my log file:
Fri Apr 7 19:26:33 CEST 2017
Fri Apr 7 19:36:11 CEST 2017
Fri Apr 7 21:18:45 CEST 2017
Sat Apr 8 00:08:09 CEST 2017
Sat Apr 8 00:29:31 CEST 2017
Sat Apr 8 10:08:17 CEST 2017
Sat Apr 8 11:58:35 CEST 2017
shell-script cron logs raspberry-pi stdout
shell-script cron logs raspberry-pi stdout
edited Apr 8 '17 at 17:48
Jeff Schaller
41.5k1056132
asked Apr 8 '17 at 17:15
user3598726user3598726
1064
edited Apr 8 '17 at 17:48
Jeff Schaller
41.5k1056132
asked Apr 8 '17 at 17:15
user3598726user3598726
1064
edited Apr 8 '17 at 17:48
Jeff Schaller
41.5k1056132
edited Apr 8 '17 at 17:48
Jeff Schaller
41.5k1056132
edited Apr 8 '17 at 17:48
Jeff Schaller
41.5k1056132
41.5k1056132
asked Apr 8 '17 at 17:15
user3598726user3598726
1064
asked Apr 8 '17 at 17:15
user3598726user3598726
1064
asked Apr 8 '17 at 17:15
user3598726user3598726
1064
1064
bumped to the homepage by Community♦ 1 min ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
bumped to the homepage by Community♦ 1 min ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
Why would you want to runshutdownon boot? A@rebootcron-job runs when the machine is booting up.
– Kusalananda
Apr 8 '17 at 17:33
What "terminal" are you expecting the output to be shown on?
– terdon♦
Apr 8 '17 at 17:51
add a comment |
Why would you want to runshutdownon boot? A@rebootcron-job runs when the machine is booting up.
– Kusalananda
Apr 8 '17 at 17:33
What "terminal" are you expecting the output to be shown on?
– terdon♦
Apr 8 '17 at 17:51
Why would you want to run
shutdown on boot? A @reboot cron-job runs when the machine is booting up.– Kusalananda
Apr 8 '17 at 17:33
Why would you want to run
shutdown on boot? A @reboot cron-job runs when the machine is booting up.– Kusalananda
Apr 8 '17 at 17:33
What "terminal" are you expecting the output to be shown on?
– terdon♦
Apr 8 '17 at 17:51
What "terminal" are you expecting the output to be shown on?
– terdon♦
Apr 8 '17 at 17:51
add a comment |
1 Answer
1
active
oldest
votes
Instead of print function try use module syslog.
import syslog
syslog.syslog('System is going to shutdown')
answered Apr 8 '17 at 17:24
darvarkdarvark
1875
I tried it, It did not help unfortunately. I suspect python scipt does not actully returns becouse of the shutdown, all my other cronlogs looks nice, and they work the same way: bash script call python scripts with simple prints
– user3598726
Apr 8 '17 at 17:40
Give the full path topythonin yourshutdownlauncher.shscript.
– user218374
Apr 8 '17 at 17:43
why do you want to use python to shutdown system? If you need delay, shutdown provides it
– darvark
Apr 8 '17 at 17:43
If I print sys. executable I always get back the same path, so the python version is ok, but i will try it. I use python to shut down, becouse I use GPIO interrupt on raspberry to start the shutdown, it was easy to do in python , works well, only print statement is missing
– user3598726
Apr 8 '17 at 17:50
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Instead of print function try use module syslog.
import syslog
syslog.syslog('System is going to shutdown')
answered Apr 8 '17 at 17:24
darvarkdarvark
1875
I tried it, It did not help unfortunately. I suspect python scipt does not actully returns becouse of the shutdown, all my other cronlogs looks nice, and they work the same way: bash script call python scripts with simple prints
– user3598726
Apr 8 '17 at 17:40
Give the full path topythonin yourshutdownlauncher.shscript.
– user218374
Apr 8 '17 at 17:43
why do you want to use python to shutdown system? If you need delay, shutdown provides it
– darvark
Apr 8 '17 at 17:43
If I print sys. executable I always get back the same path, so the python version is ok, but i will try it. I use python to shut down, becouse I use GPIO interrupt on raspberry to start the shutdown, it was easy to do in python , works well, only print statement is missing
– user3598726
Apr 8 '17 at 17:50
add a comment |
Instead of print function try use module syslog.
import syslog
syslog.syslog('System is going to shutdown')
answered Apr 8 '17 at 17:24
darvarkdarvark
1875
I tried it, It did not help unfortunately. I suspect python scipt does not actully returns becouse of the shutdown, all my other cronlogs looks nice, and they work the same way: bash script call python scripts with simple prints
– user3598726
Apr 8 '17 at 17:40
Give the full path topythonin yourshutdownlauncher.shscript.
– user218374
Apr 8 '17 at 17:43
why do you want to use python to shutdown system? If you need delay, shutdown provides it
– darvark
Apr 8 '17 at 17:43
If I print sys. executable I always get back the same path, so the python version is ok, but i will try it. I use python to shut down, becouse I use GPIO interrupt on raspberry to start the shutdown, it was easy to do in python , works well, only print statement is missing
– user3598726
Apr 8 '17 at 17:50
add a comment |
Instead of print function try use module syslog.
import syslog
syslog.syslog('System is going to shutdown')
answered Apr 8 '17 at 17:24
darvarkdarvark
1875
Instead of print function try use module syslog.
import syslog
syslog.syslog('System is going to shutdown')
answered Apr 8 '17 at 17:24
darvarkdarvark
1875
answered Apr 8 '17 at 17:24
darvarkdarvark
1875
answered Apr 8 '17 at 17:24
darvarkdarvark
1875
answered Apr 8 '17 at 17:24
darvarkdarvark
1875
1875
I tried it, It did not help unfortunately. I suspect python scipt does not actully returns becouse of the shutdown, all my other cronlogs looks nice, and they work the same way: bash script call python scripts with simple prints
– user3598726
Apr 8 '17 at 17:40
Give the full path topythonin yourshutdownlauncher.shscript.
– user218374
Apr 8 '17 at 17:43
why do you want to use python to shutdown system? If you need delay, shutdown provides it
– darvark
Apr 8 '17 at 17:43
If I print sys. executable I always get back the same path, so the python version is ok, but i will try it. I use python to shut down, becouse I use GPIO interrupt on raspberry to start the shutdown, it was easy to do in python , works well, only print statement is missing
– user3598726
Apr 8 '17 at 17:50
add a comment |
I tried it, It did not help unfortunately. I suspect python scipt does not actully returns becouse of the shutdown, all my other cronlogs looks nice, and they work the same way: bash script call python scripts with simple prints
– user3598726
Apr 8 '17 at 17:40
Give the full path topythonin yourshutdownlauncher.shscript.
– user218374
Apr 8 '17 at 17:43
why do you want to use python to shutdown system? If you need delay, shutdown provides it
– darvark
Apr 8 '17 at 17:43
If I print sys. executable I always get back the same path, so the python version is ok, but i will try it. I use python to shut down, becouse I use GPIO interrupt on raspberry to start the shutdown, it was easy to do in python , works well, only print statement is missing
– user3598726
Apr 8 '17 at 17:50
I tried it, It did not help unfortunately. I suspect python scipt does not actully returns becouse of the shutdown, all my other cronlogs looks nice, and they work the same way: bash script call python scripts with simple prints
– user3598726
Apr 8 '17 at 17:40
I tried it, It did not help unfortunately. I suspect python scipt does not actully returns becouse of the shutdown, all my other cronlogs looks nice, and they work the same way: bash script call python scripts with simple prints
– user3598726
Apr 8 '17 at 17:40
Give the full path to
python in your shutdownlauncher.sh script.– user218374
Apr 8 '17 at 17:43
Give the full path to
python in your shutdownlauncher.sh script.– user218374
Apr 8 '17 at 17:43
why do you want to use python to shutdown system? If you need delay, shutdown provides it
– darvark
Apr 8 '17 at 17:43
why do you want to use python to shutdown system? If you need delay, shutdown provides it
– darvark
Apr 8 '17 at 17:43
If I print sys. executable I always get back the same path, so the python version is ok, but i will try it. I use python to shut down, becouse I use GPIO interrupt on raspberry to start the shutdown, it was easy to do in python , works well, only print statement is missing
– user3598726
Apr 8 '17 at 17:50
If I print sys. executable I always get back the same path, so the python version is ok, but i will try it. I use python to shut down, becouse I use GPIO interrupt on raspberry to start the shutdown, it was easy to do in python , works well, only print statement is missing
– user3598726
Apr 8 '17 at 17:50
add a comment |
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Why would you want to run
shutdownon boot? A@rebootcron-job runs when the machine is booting up.– Kusalananda
Apr 8 '17 at 17:33
What "terminal" are you expecting the output to be shown on?
– terdon♦
Apr 8 '17 at 17:51