1

Related to another question I've asked earlier:

Where is the berryboot's 'config.txt' physically located on the raspberry pi? And how would I access it via command line or similar?

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3

First of all 'Raspberry Pi' is not an operating system so you have to tell the name which linux distribution you're using.

I'm using BerryBoot to boot my 4 linux distribution which are installed on my USB disk.

To find out where the config.txt and to modifying it, you have to mount BerryBoot installed device. It's formatted as FAT32.

Find the device name;  
root@pi:~# fdisk -l |grep dev
Disk /dev/mmcblk0: 3904 MB, 3904897024 bytes
/dev/mmcblk0p1               2     7626751     3813375    b  W95 FAT32
Disk /dev/sda: 16.4 GB, 16441671680 bytes
/dev/sda1          131072    32112639    15990784   83  Linux
Disk /dev/sdb: 1500.3 GB, 1500301910016 bytes
/dev/sdb1              63  2930272064  1465136001    7  HPFS/NTFS/exFAT

Then mount the device somewhere and look for config.txt

root@pi:~# mkdir /berry
root@pi:~# mount /dev/mmcblk0p1 /berry
root@pi:~# ls -l /berry
total 45092
-rwxr-xr-x 1 root root    30776 Feb 12 08:48 LICENSE.berryboot
-rwxr-xr-x 1 root root  8170528 Mar 11 04:29 berryboot.img
-rwxr-xr-x 1 root root    17816 Jul 19 17:10 bootcode.bin
-rwxr-xr-x 1 root root      134 Jul 19 16:25 cmdline.txt
-rwxr-xr-x 1 root root      133 Apr  9 21:53 cmdline.txt~
-rwxr-xr-x 1 root root      173 Jul 19 17:25 config.txt
-rwxr-xr-x 1 root root     5886 Jul 19 17:10 fixup.dat
-rwxr-xr-x 1 root root     2032 Jul 19 17:10 fixup_cd.dat
-rwxr-xr-x 1 root root     8842 Jul 19 17:10 fixup_x.dat
-rwxr-xr-x 1 root root  2805264 Jul 19 17:10 kernel.img
-rwxr-xr-x 1 root root  3609232 Mar 11 03:50 kernel_a10_aufs.img
-rwxr-xr-x 1 root root  9616160 Jul 19 17:10 kernel_emergency.img
-rwxr-xr-x 1 root root  2753200 Mar 11 04:29 kernel_rpi_aufs.img
-rwxr-xr-x 1 root root 12294570 Mar 11 04:29 shared.tgz
-rwxr-xr-x 1 root root  2690164 Jul 19 17:10 start.elf
-rwxr-xr-x 1 root root   469208 Jul 19 17:10 start_cd.elf
-rwxr-xr-x 1 root root  3657572 Jul 19 17:10 start_x.elf
-rwxr-xr-x 1 root root      413 Feb 25 00:24 uEnv.txt
2

You had to create a partition and put berryboot's files there on install; these also contained a config.txt. I suspect your question asks how to access this from within one of the distributions you installed. Under openelec it's in /var/media/<some id>, raspbian and archlinux on arm install it under /boot/. A semi user friendly console editor is nano which you would start with nano <file>.

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