bilson · November 15, 2022 06:16 · Jan 25, 2018 · Jan 24, 2018 · Jan 24, 2018 · Jan 24, 2018
diff --git a/chroot-to-pi.sh b/chroot-to-pi.sh
@@ -48,7 +48,7 @@ mount --bind /proc /mnt/raspbian/proc/
 mount --bind /dev/pts /mnt/raspbian/dev/pts
 
 # ld.so.preload fix
-sed -i 's/^/#/g' /mnt/raspbian/etc/ld.so.preload
+sed -i 's/^/#CHROOT /g' /mnt/raspbian/etc/ld.so.preload
 
 # copy qemu binary
 cp /usr/bin/qemu-arm-static /mnt/raspbian/usr/bin/
@@ -63,7 +63,7 @@ chroot /mnt/raspbian /bin/bash
 # ----------------------------
 # Clean up
 # revert ld.so.preload fix
-sed -i 's/^#//g' /mnt/raspbian/etc/ld.so.preload
+sed -i 's/^#CHROOT //g' /mnt/raspbian/etc/ld.so.preload
 
 # unmount everything
 umount /mnt/raspbian/{dev/pts,dev,sys,proc,boot,}
diff --git a/chroot-to-pi.sh b/chroot-to-pi.sh
@@ -5,6 +5,8 @@
 # on your Ubuntu desktop/laptop
 # just much faster and more convenient
 
+# credits: https://gist.github.com/jkullick/9b02c2061fbdf4a6c4e8a78f1312a689
+
 # make sure you have issued
 # (sudo) apt install qemu qemu-user-static binfmt-support
 

diff --git a/chroot-to-pi.sh b/chroot-to-pi.sh
@@ -33,6 +33,7 @@
 # https://gist.github.com/htruong/0271d84ae81ee1d301293d126a5ad716
 # so it's better just to let the pi resize the partitions
 
+mkdir -p /mnt/raspbian
 
 # mount partition
 mount -o rw ${1}2  /mnt/raspbian

diff --git a/chroot-to-pi.sh b/chroot-to-pi.sh
@@ -1,23 +1,24 @@
 #!/bin/bash
 
-# This script allows you to chroot ("work on") the raspbian sd card
-# as if it's the raspberry pi on your Ubuntu desktop/laptop
+# This script allows you to chroot ("work on") 
+# the raspbian sd card as if it's the raspberry pi
+# on your Ubuntu desktop/laptop
 # just much faster and more convenient
 
 # make sure you have issued
 # (sudo) apt install qemu qemu-user-static binfmt-support
 
 # Write the raspbian image onto the sd card,
-# boot the pi with the card once so it expands the fs automatically
+# boot the pi with the card once 
+# so it expands the fs automatically
 # then plug back to your laptop/desktop
 # and chroot to it with this script.
 
 # Invoke:
 # (sudo) ./chroot-to-pi.sh /dev/sdb 
-
-# (assuming /dev/sdb is your sd-card, to find out, issue 
+# assuming /dev/sdb is your sd-card
+# if you don't know, when you plug the card in, type:
 # dmesg | tail -n30 
-# when you plug the card in, it will tell you.)
 
 
 # Note: If you have an image file instead of the sd card, 
@@ -49,19 +50,14 @@ sed -i 's/^/#/g' /mnt/raspbian/etc/ld.so.preload
 # copy qemu binary
 cp /usr/bin/qemu-arm-static /mnt/raspbian/usr/bin/
 
+echo "You will be transferred to the bash shell now."
+echo "Issue 'exit' when you are done."
+echo "Issue 'su pi' if you need to work as the user pi."
+
 # chroot to raspbian
 chroot /mnt/raspbian /bin/bash
 
-# ------------------------------------------------
-# You will be taken to the bash command line now
-# So do whatever you need to do
-# and issue 
-# exit 
-# when you're done
-# if you need to work as the pi username, do
-# su pi
-# ------------------------------------------------
-
+# ----------------------------
 # Clean up
 # revert ld.so.preload fix
 sed -i 's/^#//g' /mnt/raspbian/etc/ld.so.preload

diff --git a/chroot-to-pi.sh b/chroot-to-pi.sh
@@ -8,24 +8,30 @@
 # (sudo) apt install qemu qemu-user-static binfmt-support
 
 # Write the raspbian image onto the sd card,
-# boot the pi with the card so it expands the fs
+# boot the pi with the card once so it expands the fs automatically
 # then plug back to your laptop/desktop
-# and chroot to it with this script 
+# and chroot to it with this script.
+
 # Invoke:
 # (sudo) ./chroot-to-pi.sh /dev/sdb 
+
 # (assuming /dev/sdb is your sd-card, to find out, issue 
 # dmesg | tail -n30 
 # when you plug the card in, it will tell you.)
 
-# If you have an image file instead of the sd card, you will need to issue 
+
+# Note: If you have an image file instead of the sd card, 
+# you will need to issue 
 # (sudo) apt install kpartx
 # (sudo) kpartx -v -a 2017-11-29-raspbian-stretch-lite.img
 # then
 # (sudo) ./chroot-to-pi.sh /dev/mapper/loop0p
-# Note that with the vanilla image, you have very little space to work on
+# With the vanilla image, you have very little space to work on
 # I have not figured out a reliable way to resize it
 # Something like this should work, but it didn't in my experience
 # https://gist.github.com/htruong/0271d84ae81ee1d301293d126a5ad716
+# so it's better just to let the pi resize the partitions
+
 
 # mount partition
 mount -o rw ${1}2  /mnt/raspbian
@@ -46,14 +52,17 @@ cp /usr/bin/qemu-arm-static /mnt/raspbian/usr/bin/
 # chroot to raspbian
 chroot /mnt/raspbian /bin/bash
 
+# ------------------------------------------------
 # You will be taken to the bash command line now
 # So do whatever you need to do
 # and issue 
 # exit 
 # when you're done
-# if you need to work on the pi username, do
+# if you need to work as the pi username, do
 # su pi
+# ------------------------------------------------
 
+# Clean up
 # revert ld.so.preload fix
 sed -i 's/^#//g' /mnt/raspbian/etc/ld.so.preload
 

diff --git a/chroot-to-pi.sh b/chroot-to-pi.sh
@@ -8,10 +8,14 @@
 # (sudo) apt install qemu qemu-user-static binfmt-support
 
 # Write the raspbian image onto the sd card,
-# boot the pi so it expands the fs, then plug back to your laptop/desktop
+# boot the pi with the card so it expands the fs
+# then plug back to your laptop/desktop
 # and chroot to it with this script 
 # Invoke:
-# (sudo) ./chroot-to-pi.sh /dev/sdb
+# (sudo) ./chroot-to-pi.sh /dev/sdb 
+# (assuming /dev/sdb is your sd-card, to find out, issue 
+# dmesg | tail -n30 
+# when you plug the card in, it will tell you.)
 
 # If you have an image file instead of the sd card, you will need to issue 
 # (sudo) apt install kpartx
@@ -47,6 +51,8 @@ chroot /mnt/raspbian /bin/bash
 # and issue 
 # exit 
 # when you're done
+# if you need to work on the pi username, do
+# su pi
 
 # revert ld.so.preload fix
 sed -i 's/^#//g' /mnt/raspbian/etc/ld.so.preload

diff --git a/chroot-to-pi.sh b/chroot-to-pi.sh
@@ -1,14 +1,27 @@
 #!/bin/bash
 
-# make sure you had
-# apt install qemu qemu-user-static binfmt-support
-# before you do this
+# This script allows you to chroot ("work on") the raspbian sd card
+# as if it's the raspberry pi on your Ubuntu desktop/laptop
+# just much faster and more convenient
+
+# make sure you have issued
+# (sudo) apt install qemu qemu-user-static binfmt-support
 
 # Write the raspbian image onto the sd card,
 # boot the pi so it expands the fs, then plug back to your laptop/desktop
 # and chroot to it with this script 
 # Invoke:
-# sudo ./chroot-to-pi.sh /dev/sdb
+# (sudo) ./chroot-to-pi.sh /dev/sdb
+
+# If you have an image file instead of the sd card, you will need to issue 
+# (sudo) apt install kpartx
+# (sudo) kpartx -v -a 2017-11-29-raspbian-stretch-lite.img
+# then
+# (sudo) ./chroot-to-pi.sh /dev/mapper/loop0p
+# Note that with the vanilla image, you have very little space to work on
+# I have not figured out a reliable way to resize it
+# Something like this should work, but it didn't in my experience
+# https://gist.github.com/htruong/0271d84ae81ee1d301293d126a5ad716
 
 # mount partition
 mount -o rw ${1}2  /mnt/raspbian

diff --git a/chroot-to-pi.sh b/chroot-to-pi.sh
@@ -7,7 +7,7 @@
 # Write the raspbian image onto the sd card,
 # boot the pi so it expands the fs, then plug back to your laptop/desktop
 # and chroot to it with this script 
-# https://gist.github.com/htruong/7df502fb60268eeee5bca21ef3e436eb
+# Invoke:
 # sudo ./chroot-to-pi.sh /dev/sdb
 
 # mount partition
@@ -29,7 +29,11 @@ cp /usr/bin/qemu-arm-static /mnt/raspbian/usr/bin/
 # chroot to raspbian
 chroot /mnt/raspbian /bin/bash
 
-########### You will be able to 
+# You will be taken to the bash command line now
+# So do whatever you need to do
+# and issue 
+# exit 
+# when you're done
 
 # revert ld.so.preload fix
 sed -i 's/^#//g' /mnt/raspbian/etc/ld.so.preload

diff --git a/chroot-to-pi.sh b/chroot-to-pi.sh
@@ -1,5 +1,15 @@
 #!/bin/bash
 
+# make sure you had
+# apt install qemu qemu-user-static binfmt-support
+# before you do this
+
+# Write the raspbian image onto the sd card,
+# boot the pi so it expands the fs, then plug back to your laptop/desktop
+# and chroot to it with this script 
+# https://gist.github.com/htruong/7df502fb60268eeee5bca21ef3e436eb
+# sudo ./chroot-to-pi.sh /dev/sdb
+
 # mount partition
 mount -o rw ${1}2  /mnt/raspbian
 mount -o rw ${1}1 /mnt/raspbian/boot
@@ -19,6 +29,7 @@ cp /usr/bin/qemu-arm-static /mnt/raspbian/usr/bin/
 # chroot to raspbian
 chroot /mnt/raspbian /bin/bash
 
+########### You will be able to 
 
 # revert ld.so.preload fix
 sed -i 's/^#//g' /mnt/raspbian/etc/ld.so.preload

diff --git a/chroot-to-pi.sh b/chroot-to-pi.sh
@@ -0,0 +1,27 @@
+#!/bin/bash
+
+# mount partition
+mount -o rw ${1}2  /mnt/raspbian
+mount -o rw ${1}1 /mnt/raspbian/boot
+
+# mount binds
+mount --bind /dev /mnt/raspbian/dev/
+mount --bind /sys /mnt/raspbian/sys/
+mount --bind /proc /mnt/raspbian/proc/
+mount --bind /dev/pts /mnt/raspbian/dev/pts
+
+# ld.so.preload fix
+sed -i 's/^/#/g' /mnt/raspbian/etc/ld.so.preload
+
+# copy qemu binary
+cp /usr/bin/qemu-arm-static /mnt/raspbian/usr/bin/
+
+# chroot to raspbian
+chroot /mnt/raspbian /bin/bash
+
+
+# revert ld.so.preload fix
+sed -i 's/^#//g' /mnt/raspbian/etc/ld.so.preload
+
+# unmount everything
+umount /mnt/raspbian/{dev/pts,dev,sys,proc,boot,}