unable to run bash script from bash script
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I've created a script that has to be executed on boot and has to run another script (which sets some variables) before executing other commands.
After writing the script, I've successfully executed it in the console, but if the script is added to crontab, the other script inside this one is not executed.
The script (main-script.sh) that has been added to crontab is the following:
#!/bin/bash
source /home/pi/test-script.sh
python mycustompythonscript.py
and the test-script.sh is the following (I replaced the actual script with this one for testing):
#!/bin/bash
echo "greetings from test script" > test.txt
So when i run main-script.sh from console, test-script.sh is executed (the file is created) and the python script is executed. Upon rebooting the RPi, however, the python script is executed, but the test-script.sh is not executed (test.txt file is not created).
Does anyone know what could be the possible reason that test-script.sh is not executed in case the main-script.sh is executed by cron?
bash shell-script raspberry-pi
asked Feb 23 at 8:58
Niko GamulinNiko Gamulin
1355
add a comment |
I've created a script that has to be executed on boot and has to run another script (which sets some variables) before executing other commands.
After writing the script, I've successfully executed it in the console, but if the script is added to crontab, the other script inside this one is not executed.
The script (main-script.sh) that has been added to crontab is the following:
#!/bin/bash
source /home/pi/test-script.sh
python mycustompythonscript.py
and the test-script.sh is the following (I replaced the actual script with this one for testing):
#!/bin/bash
echo "greetings from test script" > test.txt
So when i run main-script.sh from console, test-script.sh is executed (the file is created) and the python script is executed. Upon rebooting the RPi, however, the python script is executed, but the test-script.sh is not executed (test.txt file is not created).
Does anyone know what could be the possible reason that test-script.sh is not executed in case the main-script.sh is executed by cron?
bash shell-script raspberry-pi
asked Feb 23 at 8:58
Niko GamulinNiko Gamulin
1355
1
Depending on how you're executingmain-script.shin crontab, it might be executed via/bin/shinstead of/bin/bash. In case ofsourcecommand it's bash-specific. Try to replace that with. /home/pi/test-script.sh- that should work across the board on all POSIX compliant, bourne-like shells. Let me know if that works for you, and if it does I'll post it as a proper answer
– Sergiy Kolodyazhnyy
Feb 23 at 9:16
You can setSHELL=/bin/bashin your crontab which makes life easier.
– Freddy
Feb 23 at 9:27
I don't know how it finds the python script: You don't give an absolute path.
– ctrl-alt-delor
Feb 23 at 9:54
@SergiyKolodyazhnyy The script has a hash-bash-slash-bin-slash-bash#!/bin/bash, so a modernshwill launchbash.
– ctrl-alt-delor
Feb 23 at 10:22
@ctrl-alt-delor As I mentioned in the comment, "Depending on how you're executing main-script.sh". Ash /path/to/main.shdefinitely won't like bashisms (unless it's CentOS where/bin/shis/bin/bash).
– Sergiy Kolodyazhnyy
Feb 23 at 10:30
add a comment |
I've created a script that has to be executed on boot and has to run another script (which sets some variables) before executing other commands.
After writing the script, I've successfully executed it in the console, but if the script is added to crontab, the other script inside this one is not executed.
The script (main-script.sh) that has been added to crontab is the following:
#!/bin/bash
source /home/pi/test-script.sh
python mycustompythonscript.py
and the test-script.sh is the following (I replaced the actual script with this one for testing):
#!/bin/bash
echo "greetings from test script" > test.txt
So when i run main-script.sh from console, test-script.sh is executed (the file is created) and the python script is executed. Upon rebooting the RPi, however, the python script is executed, but the test-script.sh is not executed (test.txt file is not created).
Does anyone know what could be the possible reason that test-script.sh is not executed in case the main-script.sh is executed by cron?
bash shell-script raspberry-pi
asked Feb 23 at 8:58
Niko GamulinNiko Gamulin
1355
I've created a script that has to be executed on boot and has to run another script (which sets some variables) before executing other commands.
After writing the script, I've successfully executed it in the console, but if the script is added to crontab, the other script inside this one is not executed.
The script (main-script.sh) that has been added to crontab is the following:
#!/bin/bash
source /home/pi/test-script.sh
python mycustompythonscript.py
and the test-script.sh is the following (I replaced the actual script with this one for testing):
#!/bin/bash
echo "greetings from test script" > test.txt
So when i run main-script.sh from console, test-script.sh is executed (the file is created) and the python script is executed. Upon rebooting the RPi, however, the python script is executed, but the test-script.sh is not executed (test.txt file is not created).
Does anyone know what could be the possible reason that test-script.sh is not executed in case the main-script.sh is executed by cron?
bash shell-script raspberry-pi
bash shell-script raspberry-pi
asked Feb 23 at 8:58
Niko GamulinNiko Gamulin
1355
asked Feb 23 at 8:58
Niko GamulinNiko Gamulin
1355
asked Feb 23 at 8:58
Niko GamulinNiko Gamulin
1355
asked Feb 23 at 8:58
Niko GamulinNiko Gamulin
1355
asked Feb 23 at 8:58
Niko GamulinNiko Gamulin
1355
1355
1
Depending on how you're executingmain-script.shin crontab, it might be executed via/bin/shinstead of/bin/bash. In case ofsourcecommand it's bash-specific. Try to replace that with. /home/pi/test-script.sh- that should work across the board on all POSIX compliant, bourne-like shells. Let me know if that works for you, and if it does I'll post it as a proper answer
– Sergiy Kolodyazhnyy
Feb 23 at 9:16
You can setSHELL=/bin/bashin your crontab which makes life easier.
– Freddy
Feb 23 at 9:27
I don't know how it finds the python script: You don't give an absolute path.
– ctrl-alt-delor
Feb 23 at 9:54
@SergiyKolodyazhnyy The script has a hash-bash-slash-bin-slash-bash#!/bin/bash, so a modernshwill launchbash.
– ctrl-alt-delor
Feb 23 at 10:22
@ctrl-alt-delor As I mentioned in the comment, "Depending on how you're executing main-script.sh". Ash /path/to/main.shdefinitely won't like bashisms (unless it's CentOS where/bin/shis/bin/bash).
– Sergiy Kolodyazhnyy
Feb 23 at 10:30
add a comment |
1
Depending on how you're executingmain-script.shin crontab, it might be executed via/bin/shinstead of/bin/bash. In case ofsourcecommand it's bash-specific. Try to replace that with. /home/pi/test-script.sh- that should work across the board on all POSIX compliant, bourne-like shells. Let me know if that works for you, and if it does I'll post it as a proper answer
– Sergiy Kolodyazhnyy
Feb 23 at 9:16
You can setSHELL=/bin/bashin your crontab which makes life easier.
– Freddy
Feb 23 at 9:27
I don't know how it finds the python script: You don't give an absolute path.
– ctrl-alt-delor
Feb 23 at 9:54
@SergiyKolodyazhnyy The script has a hash-bash-slash-bin-slash-bash#!/bin/bash, so a modernshwill launchbash.
– ctrl-alt-delor
Feb 23 at 10:22
@ctrl-alt-delor As I mentioned in the comment, "Depending on how you're executing main-script.sh". Ash /path/to/main.shdefinitely won't like bashisms (unless it's CentOS where/bin/shis/bin/bash).
– Sergiy Kolodyazhnyy
Feb 23 at 10:30
1
1
Depending on how you're executing
main-script.sh in crontab, it might be executed via /bin/sh instead of /bin/bash. In case of source command it's bash-specific. Try to replace that with . /home/pi/test-script.sh - that should work across the board on all POSIX compliant, bourne-like shells. Let me know if that works for you, and if it does I'll post it as a proper answer– Sergiy Kolodyazhnyy
Feb 23 at 9:16
Depending on how you're executing
main-script.sh in crontab, it might be executed via /bin/sh instead of /bin/bash. In case of source command it's bash-specific. Try to replace that with . /home/pi/test-script.sh - that should work across the board on all POSIX compliant, bourne-like shells. Let me know if that works for you, and if it does I'll post it as a proper answer– Sergiy Kolodyazhnyy
Feb 23 at 9:16
You can set
SHELL=/bin/bash in your crontab which makes life easier.– Freddy
Feb 23 at 9:27
You can set
SHELL=/bin/bash in your crontab which makes life easier.– Freddy
Feb 23 at 9:27
I don't know how it finds the python script: You don't give an absolute path.
– ctrl-alt-delor
Feb 23 at 9:54
I don't know how it finds the python script: You don't give an absolute path.
– ctrl-alt-delor
Feb 23 at 9:54
@SergiyKolodyazhnyy The script has a hash-bash-slash-bin-slash-bash
#!/bin/bash, so a modern sh will launch bash.– ctrl-alt-delor
Feb 23 at 10:22
@SergiyKolodyazhnyy The script has a hash-bash-slash-bin-slash-bash
#!/bin/bash, so a modern sh will launch bash.– ctrl-alt-delor
Feb 23 at 10:22
@ctrl-alt-delor As I mentioned in the comment, "Depending on how you're executing main-script.sh". A
sh /path/to/main.sh definitely won't like bashisms (unless it's CentOS where /bin/sh is /bin/bash ).– Sergiy Kolodyazhnyy
Feb 23 at 10:30
@ctrl-alt-delor As I mentioned in the comment, "Depending on how you're executing main-script.sh". A
sh /path/to/main.sh definitely won't like bashisms (unless it's CentOS where /bin/sh is /bin/bash ).– Sergiy Kolodyazhnyy
Feb 23 at 10:30
add a comment |
1 Answer
1
active
oldest
votes
You need to specify an absolute path for test.txt. It won't put it where you expect.
do sudo find / -iname "test.txt" to find it.
(The python script should also have a full path name.)
answered Feb 23 at 10:20
ctrl-alt-delorctrl-alt-delor
12k42561
python seems to be in/usr/bin, so it's found.
– Freddy
Feb 23 at 10:24
1
@Freddy Python script, not python interpreter.
– ctrl-alt-delor
Feb 23 at 10:25
1
Oops, you're right!
– Freddy
Feb 23 at 10:26
add a comment |
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1 Answer
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1 Answer
1
active
oldest
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active
oldest
votes
You need to specify an absolute path for test.txt. It won't put it where you expect.
do sudo find / -iname "test.txt" to find it.
(The python script should also have a full path name.)
answered Feb 23 at 10:20
ctrl-alt-delorctrl-alt-delor
12k42561
python seems to be in/usr/bin, so it's found.
– Freddy
Feb 23 at 10:24
1
@Freddy Python script, not python interpreter.
– ctrl-alt-delor
Feb 23 at 10:25
1
Oops, you're right!
– Freddy
Feb 23 at 10:26
add a comment |
You need to specify an absolute path for test.txt. It won't put it where you expect.
do sudo find / -iname "test.txt" to find it.
(The python script should also have a full path name.)
answered Feb 23 at 10:20
ctrl-alt-delorctrl-alt-delor
12k42561
python seems to be in/usr/bin, so it's found.
– Freddy
Feb 23 at 10:24
1
@Freddy Python script, not python interpreter.
– ctrl-alt-delor
Feb 23 at 10:25
1
Oops, you're right!
– Freddy
Feb 23 at 10:26
add a comment |
You need to specify an absolute path for test.txt. It won't put it where you expect.
do sudo find / -iname "test.txt" to find it.
(The python script should also have a full path name.)
answered Feb 23 at 10:20
ctrl-alt-delorctrl-alt-delor
12k42561
You need to specify an absolute path for test.txt. It won't put it where you expect.
do sudo find / -iname "test.txt" to find it.
(The python script should also have a full path name.)
answered Feb 23 at 10:20
ctrl-alt-delorctrl-alt-delor
12k42561
answered Feb 23 at 10:20
ctrl-alt-delorctrl-alt-delor
12k42561
answered Feb 23 at 10:20
ctrl-alt-delorctrl-alt-delor
12k42561
answered Feb 23 at 10:20
ctrl-alt-delorctrl-alt-delor
12k42561
12k42561
python seems to be in/usr/bin, so it's found.
– Freddy
Feb 23 at 10:24
1
@Freddy Python script, not python interpreter.
– ctrl-alt-delor
Feb 23 at 10:25
1
Oops, you're right!
– Freddy
Feb 23 at 10:26
add a comment |
python seems to be in/usr/bin, so it's found.
– Freddy
Feb 23 at 10:24
1
@Freddy Python script, not python interpreter.
– ctrl-alt-delor
Feb 23 at 10:25
1
Oops, you're right!
– Freddy
Feb 23 at 10:26
python seems to be in
/usr/bin, so it's found.– Freddy
Feb 23 at 10:24
python seems to be in
/usr/bin, so it's found.– Freddy
Feb 23 at 10:24
1
1
@Freddy Python script, not python interpreter.
– ctrl-alt-delor
Feb 23 at 10:25
@Freddy Python script, not python interpreter.
– ctrl-alt-delor
Feb 23 at 10:25
1
1
Oops, you're right!
– Freddy
Feb 23 at 10:26
Oops, you're right!
– Freddy
Feb 23 at 10:26
add a comment |
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1
Depending on how you're executing
main-script.shin crontab, it might be executed via/bin/shinstead of/bin/bash. In case ofsourcecommand it's bash-specific. Try to replace that with. /home/pi/test-script.sh- that should work across the board on all POSIX compliant, bourne-like shells. Let me know if that works for you, and if it does I'll post it as a proper answer– Sergiy Kolodyazhnyy
Feb 23 at 9:16
You can set
SHELL=/bin/bashin your crontab which makes life easier.– Freddy
Feb 23 at 9:27
I don't know how it finds the python script: You don't give an absolute path.
– ctrl-alt-delor
Feb 23 at 9:54
@SergiyKolodyazhnyy The script has a hash-bash-slash-bin-slash-bash
#!/bin/bash, so a modernshwill launchbash.– ctrl-alt-delor
Feb 23 at 10:22
@ctrl-alt-delor As I mentioned in the comment, "Depending on how you're executing main-script.sh". A
sh /path/to/main.shdefinitely won't like bashisms (unless it's CentOS where/bin/shis/bin/bash).– Sergiy Kolodyazhnyy
Feb 23 at 10:30