Added shell functions

.gitignore

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-.DS_Store
+.DS_Store
+.env.sh

README.md

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+# Nikus Dotfiles
+
+## Note for env.shell.example
+Copy it and rename it to .env.sh. Don't commit one with your environment variables, that variables are secret keys

shell/env.sh.example

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+export GOTIFY_KEY=""

shell/functions.sh

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+function secure_erase {
+    dd if=/dev/urandom of=/dev/$1 bs=1M status=progress
+    dd if=/dev/urandom of=/dev/$1 bs=1M status=progress
+    dd if=/dev/urandom of=/dev/$1 bs=1M status=progress
+    dd if=/dev/urandom of=/dev/$1 bs=1M status=progress
+    curl --location --request POST 'https://gotify.cat-enby.club/message' --header 'X-Gotify-Key: $GOTIFY_KEY' --header 'Content-Type: application/json' --data-raw '{
+        "appid": 1,
+        "message": "Disk /dev/$1 successfully erased",
+        "title": "secure_erase complete",
+        "date": "$(date +"%Y-%m-%d %T")",
+        "priority": 5
+    }'
+    echo "Disc /dev/$1 erased successfully"
+}