Linux Notes

A collection of useful Linux commands and notes for various tasks.

Package Management #

Uninstalling Packages #

To remove packages and their configuration files from your system.

# Clean up the local repository of retrieved package files
sudo apt clean && sudo apt autoremove

# Remove a package and its configuration files
sudo apt purge <package_name>

Nvidia GPU #

Monitoring #

To monitor the status and usage of your Nvidia GPU in real-time.

# Watch nvidia-smi, refreshing every 1 second
watch -n 1 nvidia-smi

Confidential Computing #

To check the confidential computing status of your Nvidia GPU.

# Check confidential computing feature status
nvidia-smi conf-compute -f

# Check if the nvidia-persistenced daemon is running
ps aux | grep nvidia-persistenced

Kernel Management #

Listing Kernels #

To see all installed kernel images on your system.

dpkg --list | grep linux-image

Removing a Kernel #

# Remove a specific kernel image and its configuration
sudo apt remove --purge linux-image-5.19.0-rc6-snp-host-c4daeffce56e

# Update the GRUB bootloader
sudo update-grub

# Remove any unused packages
sudo apt autoremove --purge

Switching Kernels #

To change the default kernel used for booting.

1. Edit the GRUB configuration file:

   sudo vim /etc/default/grub

2. Update the GRUB_DEFAULT entry to point to the desired kernel.
3. Update the GRUB bootloader:

   sudo update-grub

TEE (Trusted Execution Environment) #

Commands related to AMD SEV and trusted execution.

# Enable the vfio-pci module

sudo modprobe vfio-pci

# Check for AMD SEV in kernel messages

sudo dmesg | grep -i sev

Windows Network Drive #

For information on mapping a network drive in Windows, refer to this guide:

• Windows 映射网络驱动器