Linux Device Management
- Udev identifies new hardware and adds the entry of the hardware in the /dev folder
Linux File Soft and Hard Links
Exercise for Soft and Hard links
- Basic Setup
mkdir contents
cd contents
echo "hello world" >> text1.txt
echo "welcome to linux" >> text2.txt
ls -al .
cd ..
mkdir links
cd links
ln -s ../contents/text1.txt softtext1.txt
ln ../contents/text1.txt hardtext1.txt
ls -al .
- Delete the source and verify the links
cd contents/
rm text1.txt
cd ../links
cat softtext1.txt # This command will fail
cat hardtext1.txt
- Create a softlink and a hardlink for text2.txt
- Change the contents using the softlink and hardlink
inodes
- Number that represents the metadata
- Refer Here for more info on inodes
Linux Disk Mounting and Partition
- Disk
- FileSystem
- Mount
Exercise
- Find the disks connected to the linux
fdisk -l
- Attach 1GB disk to the existing ec2 instance and execute the following commands
fdisk -l
ls -lart /dev
- Apply the filesystem to the disk (ext4/xfs)
mkfs -t ext4 /dev/xvdf
- Mounting the disk to some directory
df -h
mkdir /testdir
mount /dev/xvdf /testdir
df -h
