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## Ephemeral disk size usage estimations for Linux
```
$ git fetch origin +refs/tags/torvalds-head:refs/tags/torvalds-head --depth=1
$ du -h .
260M .
$ git checkout torvalds-head
$ du -h .
2G .
$ git fetch origin 2dde18cd1d8fac735875f2e4987f11817cc0bc2c --depth=1
$ du -h .
2.1G .
$ git checkout 2dde18cd1d8fac735875f2e4987f11817cc0bc2c
$ du -h .
2G .
```
## Without cloning the repository
```
mkdir ~/shallow-repo ~/shallow-repo/.git ~/shallow-repo/workdir ~/overlayfs
mount -t tmpfs -o size=128M tmpfs /root/overlayfs
mkdir ~/overlayfs/upper ~/overlayfs/work
mount -t overlay overlay -o lowerdir=/kernel-repo,upperdir=/root/overlayfs/upper,workdir=/root/overlayfs/work /root/shallow-repo/.git
git --git-dir=/root/shallow-repo/.git --work-tree=/root/shallow-repo/workdir checkout master
```
Needs:
```
securityContext:
capabilities:
add: ["SYS_ADMIN"]
```
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