using usb or cd to rescue ruined ubuntu

sudo fdisk -l

find out the disk you want to mount

then

sudo mount /dev/YOUR-DISK /mnt

sudo chroot /mnt

then you have the permission to operate on that disk


text mode

ubuntu@ubuntu:/$ sudo systemctl get-default
graphical.target
ubuntu@ubuntu:/$ sudo systemctl set-default graphical.target
Created symlink from /etc/systemd/system/default.target to /lib/systemd/system/graphical.target.
ubuntu@ubuntu:/$ sudo systemctl get-default
graphical.target

data structure

sed 's/cv=0/cv=1/g' Stage2_GenerateFeatures0.py > Stage2_GenerateFeatures1.py
sed 's/cv=0/cv=2/g' Stage2_GenerateFeatures0.py > Stage2_GenerateFeatures2.py
sed 's/cv=0/cv=3/g' Stage2_GenerateFeatures0.py > Stage2_GenerateFeatures3.py
sed 's/cv=0/cv=4/g' Stage2_GenerateFeatures0.py > Stage2_GenerateFeatures4.py
sed 's/cv=0/cv=5/g' Stage2_GenerateFeatures0.py > Stage2_GenerateFeatures5.py
sed 's/cv=0/cv=6/g' Stage2_GenerateFeatures0.py > Stage2_GenerateFeatures6.py
sed 's/cv=0/cv=7/g' Stage2_GenerateFeatures0.py > Stage2_GenerateFeatures7.py
sed 's/cv=0/cv=8/g' Stage2_GenerateFeatures0.py > Stage2_GenerateFeatures8.py
sed 's/cv=0/cv=9/g' Stage2_GenerateFeatures0.py > Stage2_GenerateFeatures9.py

mkdir -p /mnt/BioAdHoc/Users/zfu/2014_Retrain_Classifier/Stage3.Data/Allergen/PubMed_IDs
mkdir -p /mnt/BioAdHoc/Users/zfu/2014_Retrain_Classifier/Stage3.Data/Autoimm/PubMed_IDs
mkdir -p /mnt/BioAdHoc/Users/zfu/2014_Retrain_Classifier/Stage3.Data/Cancer/PubMed_IDs
mkdir -p /mnt/BioAdHoc/Users/zfu/2014_Retrain_Classifier/Stage3.Data/Infectious_Disease/PubMed_IDs
mkdir -p /mnt/BioAdHoc/Users/zfu/2014_Retrain_Classifier/Stage3.Data/Other/PubMed_IDs
mkdir -p /mnt/BioAdHoc/Users/zfu/2014_Retrain_Classifier/Stage3.Data/Transplant/PubMed_IDs

mkdir -p /mnt/BioAdHoc/Users/zfu/2014_Retrain_Classifier/Stage3.Data/Allergen/Training_Sets
mkdir -p /mnt/BioAdHoc/Users/zfu/2014_Retrain_Classifier/Stage3.Data/Autoimm/Training_Sets
mkdir -p /mnt/BioAdHoc/Users/zfu/2014_Retrain_Classifier/Stage3.Data/Cancer/Training_Sets
mkdir -p /mnt/BioAdHoc/Users/zfu/2014_Retrain_Classifier/Stage3.Data/Infectious_Disease/Training_Sets
mkdir -p /mnt/BioAdHoc/Users/zfu/2014_Retrain_Classifier/Stage3.Data/Other/Training_Sets
mkdir -p /mnt/BioAdHoc/Users/zfu/2014_Retrain_Classifier/Stage3.Data/Transplant/Training_Sets

sed 's/Features0/Features1/g' Stage3_GenerateFeatures0.sh > Stage3_GenerateFeatures1.sh
sed 's/Features0/Features2/g' Stage3_GenerateFeatures0.sh > Stage3_GenerateFeatures2.sh
sed 's/Features0/Features3/g' Stage3_GenerateFeatures0.sh > Stage3_GenerateFeatures3.sh
sed 's/Features0/Features4/g' Stage3_GenerateFeatures0.sh > Stage3_GenerateFeatures4.sh


sed 's/cv=0/cv=1/g' Stage3_GenerateFeatures0.py > Stage3_GenerateFeatures1.py
sed 's/cv=0/cv=2/g' Stage3_GenerateFeatures0.py > Stage3_GenerateFeatures2.py
sed 's/cv=0/cv=3/g' Stage3_GenerateFeatures0.py > Stage3_GenerateFeatures3.py
sed 's/cv=0/cv=4/g' Stage3_GenerateFeatures0.py > Stage3_GenerateFeatures4.py