feat: initial commit

docs/linux/disk-management.md

@@ -0,0 +1,35 @@
+# Disk management
+
+### Show filesystems 
+
+```shell
+sudo df -h
+```
+
+Example output:
+
+```shell
+Filesystem      Size  Used Avail Use% Mounted on
+udev            456M     0  456M   0% /dev
+tmpfs            97M  9.4M   87M  10% /run
+/dev/vda1        19G  2.6G   16G  15% /
+tmpfs           481M     0  481M   0% /dev/shm
+tmpfs           5.0M     0  5.0M   0% /run/lock
+tmpfs            97M     0   97M   0% /run/user/1003
+```
+
+### List folders
+
+```shell
+du -h -d 1 | sort -h
+```
+
+Example output:
+
+```shell
+8.0K    ./.ansible
+8.0K    ./.config
+8.0K    ./.vim
+12K     ./.ssh
+172K    .
+```

docs/linux/journalctl.md

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+# Journalctl
+
+Follow logs live
+
+```shell
+sudo journalctl -u sshd --follow
+```
+
+Cleanup logs
+
+```shell
+sudo journalctl --vacuum-size=1K
+```

docs/linux/packages.md

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+# Packages and updates
+
+## Debian / Ubuntu
+
+Update and upgrade.
+
+```shell
+apt update
+apt upgrade -y
+```
+
+Default packages.
+
+```shell
+apt install -y sudo net-tools wget curl unzip htop vim
+```
+
+Autoremove and cleanup.
+
+```shell
+apt autoremove -y
+apt clean
+```