XUbuntu 16.04 with read only filesystem for use with SSD disk
---------------------------------------------------------------

* Example:
    /dev/sda: HDD disk
    /dev/sdc: SDD disk
    /dev/sdc1: /
    /dev/sda2: /home /tmp /var/tmp
    /dev/sda3: swap

* Install XUbuntu 16.04 in /dev/sdc1.

* mkdir /media/sda2

* mount /dev/sdc1 /media/sda2

* mkdir /media/sda2/tmp

* chmod 1777 /media/sda2/tmp

* mkdir /media/sda2/username

* rsync -av /home/username/ /media/sda2/username/

* chmod 0700 /media/sda2/username

* chown -R username.username /media/sda2/username

* blkid
    /dev/sda1: UUID="D4EA43ACEA438A26" TYPE="ntfs"
    /dev/sda2: UUID="c1a48592-1d54-4b61-822b-e02ce0c8094d" TYPE="ext4"
    /dev/sda3: UUID="7af9d5db-eac4-49f1-aafd-3cb82f08c9df" TYPE="swap"
    /dev/sdb1: UUID="f1b32eb2-4f4f-4167-9817-7814c9dae9b5" TYPE="ext4"
    /dev/sdb2: UUID="2A0F03B406002566" TYPE="ntfs"
    /dev/sdc1: UUID="9d0a8f06-d686-4a6d-97d5-2320598335fb" TYPE="ext4"

* /etc/fstab
    UUID=9d0a8f06-d686-4a6d-97d5-2320598335fb   /               ext4    ro,noatime,errors=remount-ro    0       1
    UUID=c1a48592-1d54-4b61-822b-e02ce0c8094d   /media/sda2     ext4    rw,noatime,errors=remount-ro    0       1
    UUID=7af9d5db-eac4-49f1-aafd-3cb82f08c9df   none            swap    sw                              0       0
    tmpfs               /var/lib/lightdm        tmpfs           nosuid,nodev,mode=0750,rw,size=32M,uid=lightdm,gid=lightdm      0       0
    tmpfs               /var/log                tmpfs           nosuid,nodev,mode=0755,rw,size=32M      0       0
    /media/sda2/home    /home                   none            bind                                    0       0
    /media/sda2/tmp     /tmp                    none            bind                                    0       0
    /media/sda2/tmp     /var/tmp                none            bind                                    0       0
    /var/log            /var/spool              none            bind                                    0       0
    /var/log            /var/lib/blueman        none            bind                                    0       0

* /usr/local/bin/remountrw
    mount -o remount,rw /

* /usr/local/bin/remountro
    sync
    sleep 1
    mount -o remount,ro /

* Issues:
    * The guest session not work: /etc/password and /etc/shadow are read only.