Some useful commands to find size of the files and folders in linux
1. To find the size of all partitions in the linux system
df -kh
2. To find the total size of the folder
du -sh 
3. To find the largest files or folders from the selected folder
du -sh -- * | sort -hr
du -sh -- * | sort -hr | head -n 10
du -sh -- /var/log/* | sort -hr | head -n 10
4. To find the total size by excluding specific folder or patterns
du -csh /var/log/* --exclude=/var/log/journal | sort -hr | head -n 10
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