Hi Dieter, Still not working. I have a hunch that the problem is with Tkinter but can't tell. I have to run my GUI program SimB.py with the terminal program on the BBB, typing sudo python SimB.py, then it runs happily.
*Here's my crontab in /etc:* # /etc/crontab: system-wide crontab # Unlike any other crontab you don't have to run the `crontab' # command to install the new version when you edit this file # and files in /etc/cron.d. These files also have username fields, # that none of the other crontabs do. SHELL=/bin/sh PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin # m h dom mon dow user command 17 * * * * root cd / && run-parts --report /etc/cron.hourly 25 6 * * * root test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.daily ) 47 6 * * 7 root test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.weekly ) 52 6 1 * * root test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.monthly ) # @reboot root /usr/bin/python /home/debian/Desktop/SimB.py * * * * * root /usr/bin/python /home/debian/Desktop/SimB.py *and here's from the syslog file that doesn't tell me anything:* Apr 16 23:37:01 beaglebone /USR/SBIN/CRON[2293]: (root) CMD (sudo python /home/debian/Desktop/SimB.py) Apr 16 23:37:01 beaglebone /USR/SBIN/CRON[2294]: (debian) CMD (sudo python /home/debian/Desktop/SimB.py) Apr 16 23:37:01 beaglebone /USR/SBIN/CRON[2295]: (root) CMD (/usr/bin/python /home/debian/Desktop/SimB.py) Apr 16 23:37:14 beaglebone /USR/SBIN/CRON[2292]: (CRON) info (No MTA installed, discarding output) Apr 16 23:37:14 beaglebone /USR/SBIN/CRON[2290]: (CRON) info (No MTA installed, discarding output) Apr 16 23:37:14 beaglebone /USR/SBIN/CRON[2291]: (CRON) info (No MTA installed, discarding output) I can successfully run my program with a keyboard attached to my BBB using sudo python SimB.py, have to use the sudo, otherwise gets a Tkinter error. I just now double-checked and my GUI program SimB.py runs very happily. Cannot run SimB.py thru putty as it gives the Tkinter error. Any ideas? Thanks, John On Saturday, April 16, 2016 at 1:04:21 AM UTC-7, Dieter Wirz wrote: > > On Sat, Apr 16, 2016 at 5:57 AM, John Baker <[email protected] > <javascript:>> wrote: > >> John Minton, >> I gave crontab a try and of course it didn't work. It seems like this >> should be a piece of cake to do. I probably did something wrong. I checked >> the syslog and see an error: "No MTA installed." >> > > > If u > > have an error in crontab the crontab tries to send you an Email... And > of coarse cannot without MTA;) > > My crontab file says: >> >> @reboot sudo python /home/debian/Desktop/myProg.py >> * * * * * sudo python /home/debian/Desktop/myProg.py >> > > The are two crontabs, users and system crontab. > Users crontab you can change with > $ crontab -e > System crontab with > $ sudo nano /etc/crontab > > If u want to run a process as root, then best is, if u add > >> @reboot root /usr/bin/python /home/debian/Desktop/myProg.py >> * * * * * root /usr/bin/python /home/debian/Desktop/myProg.py >> > to /etc/crontab > > HTH > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/ad44be62-e803-43e8-b131-131d16fd92f9%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
