Simulate-IOT.md

@@ -16,7 +16,7 @@ Install some dependent tools:
 
 Install ninja：
 
-`apt install re2c
+`apt install re2c`
 
 `git clone git://github.com/ninja-build/ninja.git && cd ninja`
 
@@ -41,40 +41,44 @@ Using a pre-compiled Debian MIPS kernel with a MIPS QCOW2 file system image, boo
 
 
 1.Getting squashfs root
+
 Download the firmware from the internet and extracting the device firewre with binwalk.
 `sudo apt-get -y install unzip`
 `unzip DIR-850L_REVA_FIRMWARE_1.00.B07.ZIP`
 `binwalk -e DIR850LA1_FW114WWb07.bin`
 
 2.Getting a kernal and file system image
+
 'mkdir linux_mips; cd linux_mips'
 'wget https://people.debian.org/~aurel32/qemu/mips/vmlinux-3.2.0-4-4kc-malta'
 `wget https://people.debian.org/~aurel32/qemu/mips/debian_wheezy_mips_standard.qcow2`
 
 3.Booting the vm
-`qemu-system-mips -M malta -kernel vmlinux-3.2.0-4-4kc-malta -hda debian_wheezy_mips_standard.qcow2 -append "root=/dev/sda1" -nographic -net nic -net user,id=tcp,hostfwd=tcp::5022-:22,hostfwd=tcp:5023:23,hostfwd=tcp:48101:48101`
 
+`qemu-system-mips -M malta -kernel vmlinux-3.2.0-4-4kc-malta -hda debian_wheezy_mips_standard.qcow2 -append "root=/dev/sda1" -nographic -net nic -net user,id=tcp,hostfwd=tcp::5022-:22,hostfwd=tcp:5023:23,hostfwd=tcp:48101:48101`
 
 
 4.Copying the squashfs root
+
 ensure that the sshd is running inside the MIPS VM:
-`root@debian-mips:~# service ssh start; service ssh status
-Starting OpenBSD Secure Shell server: sshd.
-sshd is running.
-root@debian-mips:~#`
+`root@debian-mips:~# service ssh start; service ssh status`
+
+`Starting OpenBSD Secure Shell server: sshd.`
+`sshd is running.`
+`root@debian-mips:~#`
 
 back on the host OS, tar up the contents of the squashfs root and copy it into the guest VM:
 
-$ tar zcf squashfs-root.tar.gz squashfs-root/
-$ scp -P 2222 ./squashfs-root.tar.gz root@127.0.0.1:/root
+`$ tar zcf squashfs-root.tar.gz squashfs-root/`
+`$ scp -P 2222 ./squashfs-root.tar.gz root@127.0.0.1:/root`
 
 
 extract the tarball on the guest MIPS VM:
 
-root@debian-mips:~# ls
-squashfs-root.tar.gz
-root@debian-mips:~# tar zxf squashfs-root.tar.gz
-root@debian-mips:~#
+`root@debian-mips:~# ls`
+`squashfs-root.tar.gz`
+`root@debian-mips:~# tar zxf squashfs-root.tar.gz`
+`root@debian-mips:~#`
 Inatll /proc，/dev and /sys and use chroot to enter the firmware file system：
 
 ![image](uploads/7550d24729626f680eca7c1e7d764e6e/image.png)
@@ -82,4 +86,4 @@ Inatll /proc，/dev and /sys and use chroot to enter the firmware file system：
 5.Starting the device's service
 Most embedded Linux devices have startup scripts in /etc/init.d/ that will launch services and perform configuration.
 
-# `/etc/init.d/rcS`
+`#/etc/init.d/rcS`