Updated readme with install and config sections

README.md

@@ -1,10 +1,38 @@
 # Alpine Chroot
 
+
+### Installation
+
 To create a base alpine chroot on any alpine system, run:
 
 ```sh
 chmod +x *.sh
 ./alpine_init.sh
 ```
+But this is assuming your current working directory is the directory of the
+cloned repository.
 
-Assuming your current working directory is the directory of the cloned repository.
+When it is your first time in the chroot, run:
+
+```sh
+./chroot_init.sh
+```
+
+
+### Usage
+
+Most people will go "into" the chroot via:
+
+```sh
+chroot /mnt/chroot sh
+```
+
+But you must remember that you can just as well run any program in the chroot
+as:
+
+```sh
+chroot /mnt/chroot <program>
+```
+
+Because **chroots are not jails, containers, or sandboxes**. They simply change
+what the system sees as the "root" point of the file system.

alpine_init.sh

@@ -7,7 +7,8 @@ mv repositories /etc/apk/repositories
 # setting the mirror
 apk add curl
 curl -LO http://nl.alpinelinux.org/alpine/MIRRORS.txt
-mirror=`grep $(head -n 1 /etc/apk/repositories) | sed -e "s/.*\/\///" | sed -e "s/\//\ /" | awk '{print $1}') MIRRORS.txt`
+repo_domain=`head -n 1 /etc/apk/repositories | sed -e "s/.*\/\///" | sed -e "s/\//\ /" | awk '{print $1}'`
+mirror=`grep $repo_domain MIRRORS.txt`
 rm MIRRORS.txt
 
 # setting the chroot dir
@@ -19,9 +20,10 @@ arch=$(uname -m)
 
 
 # set up apk
-version="edge"
+version="2.12.7-r0"
 curl -LO ${mirror}/latest-stable/main/${arch}/apk-tools-static-${version}.apk
 tar -xzf apk-tools-static-*.apk
+rm apk-tools-static-*.apk
 
 # install the alpine base installation onto the chroot
 ./sbin/apk.static -X ${mirror}/latest-stable/main -U --allow-untrusted -p ${chroot_dir} --initdb add alpine-base
@@ -35,8 +37,9 @@ mount -o bind /sys ${chroot_dir}/sys
 cp -L /etc/resolv.conf ${chroot_dir}/etc/
 
 # prepare the APK repositories
-branch=$version # change if you want a specific version
+branch="edge" # change if you want a specific version
 mkdir -p ${chroot_dir}/etc/apk
 echo "${mirror}/${branch}/main" > ${chroot_dir}/etc/apk/repositories
 
-chroot ${chroot_dir} chroot_init.sh
+cp chroot_init.sh ${chroot_dir}/chroot_init.sh
+chroot ${chroot_dir} sh

chroot_init.sh

@@ -13,6 +13,3 @@ rc-update add syslog boot
 rc-update add mount-ro shutdown
 rc-update add killprocs shutdown
 rc-update add savecache shutdown
-
-# login shell
-sh -l