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raspberry:read_only [2021/05/27 14:00]
admin 		raspberry:read_only [2021/05/27 14:21]
admin [Disable some Programs]
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-==== Fstab ==== +==== Drives ==== 
-in the fstab:+In the fstab:
   $ sudo nano /etc/fstab   $ sudo nano /etc/fstab
-one has to change the SD card to read only (ro) and also make a temporary virtual drive:+one has to change the SD card to read only (ro) and one has to make a temporary virtual drive (30MB), too:
   /dev/mmcblk0p2  /               ext4    defaults,noatime,ro  0       1   /dev/mmcblk0p2  /               ext4    defaults,noatime,ro  0       1
   tmpfs           /tmp            tmpfs   defaults,size=30M    0       0   tmpfs           /tmp            tmpfs   defaults,size=30M    0       0
  
 +----
 ==== Disable some Programs ==== ==== Disable some Programs ====
 One has to disable some programs,  rsyslog and dphys-swapfile:\\ One has to disable some programs,  rsyslog and dphys-swapfile:\\
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   $ sudo systemctl disable rsyslog   $ sudo systemctl disable rsyslog
   $ sudo systemctl disable dphys-swapfile   $ sudo systemctl disable dphys-swapfile
 +
 +If one needs a programs that requires writing one has to make sure that will be in the temporary drive. That could be done for example with a symbolic link:
 +  $ ln -s /home/pi/tmp /tmp
  
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