Software
root@srv:~# dpkg-query -l|wc -l 582 root@srv:~# df -h / Filesystem Size Used Avail Use% Mounted on /dev/sdb2 117G 11G 100G 10% /
Security
- Mandatory Access Control (MAC) system – AppArmor is in enforce mode.
root@srv:~# apparmor_status apparmor module is loaded. 28 profiles are loaded. 28 profiles are in enforce mode. /snap/snapd/7264/usr/lib/snapd/snap-confine /snap/snapd/7264/usr/lib/snapd/snap-confine//mount-namespace-capture-helper /usr/bin/man /usr/lib/NetworkManager/nm-dhcp-client.action /usr/lib/NetworkManager/nm-dhcp-helper /usr/lib/connman/scripts/dhclient-script /usr/lib/snapd/snap-confine /usr/lib/snapd/snap-confine//mount-namespace-capture-helper /usr/sbin/tcpdump /{,usr/}sbin/dhclient lsb_release man_filter man_groff nvidia_modprobe nvidia_modprobe//kmod snap-update-ns.lxd snap.lxd.activatemyserver snap.lxd.benchmark snap.lxd.buginfo snap.lxd.check-kernel snap.lxd.daemon snap.lxd.hook.configure snap.lxd.hook.install snap.lxd.hook.remove snap.lxd.lxc snap.lxd.lxc-to-lxd snap.lxd.lxd snap.lxd.migrate 0 profiles are in complain mode. 0 processes have profiles defined. 0 processes are in enforce mode. 0 processes are in complain mode. 0 processes are unconfined but have a profile defined. - Network firewall – None. By default the iptables is installed with no rules and the firewalld is not installed.
Storage
Default installation on a single disk, which has only free space on you disk or you reclaimed all the occupied space during installation. Ubuntu 20.04 LTS needs arround 11G space for the default installation, so if you select a destination disk, which has less than 11G of space you should delete existing partitions to free up space or let Ubuntu 20.04 LTS installer to do default installation asking you to reclaim the disk space. We used the whole disk for the installation.
By default Ubuntu 20.04 LTS server uses.
- ext4 – file system
- 3 separate partitions – boot efi, swap and root.
- root, home and swap partitions. No device mapper or LVM2.
- /boot, root and home on the same partition.
- vfat – boot efi partition.
Ubuntu server 20.04 LTS
- Disk layout
root@srv:~# parted -l Model: ATA KINGSTON SNV425S (scsi) Disk /dev/sda: 128GB Sector size (logical/physical): 512B/512B Partition Table: gpt Disk Flags: Number Start End Size File system Name Flags 1 1049kB 630MB 629MB fat32 EFI System Partition boot, esp 2 630MB 1704MB 1074MB ext4 3 1704MB 128GB 126GB
- Mounted Partitions
root@srv:~# df -h Filesystem Size Used Avail Use% Mounted on udev 12G 0 12G 0% /dev tmpfs 2.4G 1.9M 2.4G 1% /run /dev/sdb2 117G 11G 100G 10% / tmpfs 12G 0 12G 0% /dev/shm tmpfs 5.0M 0 5.0M 0% /run/lock tmpfs 12G 0 12G 0% /sys/fs/cgroup /dev/sdb1 511M 7.8M 504M 2% /boot/efi /dev/loop0 55M 55M 0 100% /snap/core18/1705 /dev/loop1 28M 28M 0 100% /snap/snapd/7264 /dev/loop2 69M 69M 0 100% /snap/lxd/14804 /dev/loop3 55M 55M 0 100% /snap/core18/1754 tmpfs 2.4G 0 2.4G 0% /run/user/1000 /dev/loop4 70M 70M 0 100% /snap/lxd/15067
- File system layout
root@srv:~# ls -al / total 8388688 drwxr-xr-x 20 root root 4096 May 15 13:55 . drwxr-xr-x 20 root root 4096 May 15 13:55 .. lrwxrwxrwx 1 root root 7 Apr 23 07:32 bin -> usr/bin drwxr-xr-x 4 root root 4096 May 20 06:34 boot drwxr-xr-x 2 root root 4096 May 15 13:54 cdrom drwxr-xr-x 21 root root 4820 May 19 18:55 dev drwxr-xr-x 93 root root 4096 May 20 06:35 etc drwxr-xr-x 3 root root 4096 May 15 14:00 home lrwxrwxrwx 1 root root 7 Apr 23 07:32 lib -> usr/lib lrwxrwxrwx 1 root root 9 Apr 23 07:32 lib32 -> usr/lib32 lrwxrwxrwx 1 root root 9 Apr 23 07:32 lib64 -> usr/lib64 lrwxrwxrwx 1 root root 10 Apr 23 07:32 libx32 -> usr/libx32 drwx------ 2 root root 16384 May 15 13:53 lost+found drwxr-xr-x 2 root root 4096 Apr 23 07:32 media drwxr-xr-x 2 root root 4096 Apr 23 07:32 mnt drwxr-xr-x 2 root root 4096 Apr 23 07:32 opt dr-xr-xr-x 447 root root 0 May 19 18:55 proc drwx------ 4 root root 4096 May 15 14:01 root drwxr-xr-x 28 root root 940 May 20 10:41 run lrwxrwxrwx 1 root root 8 Apr 23 07:32 sbin -> usr/sbin drwxr-xr-x 6 root root 4096 May 15 14:00 snap drwxr-xr-x 2 root root 4096 Apr 23 07:32 srv -rw------- 1 root root 8589934592 May 15 13:55 swap.img dr-xr-xr-x 13 root root 0 May 19 18:55 sys drwxrwxrwt 11 root root 4096 May 20 10:47 tmp drwxr-xr-x 14 root root 4096 Apr 23 07:34 usr drwxr-xr-x 13 root root 4096 Apr 23 07:35 var
Partitions in configuration:
root@srv:~# cat /etc/fstab # /etc/fstab: static file system information. # # Use 'blkid' to print the universally unique identifier for a # device; this mmyserveray be used with UUID= as a more robust way to name devices # that works even if disks are added and removed. See fstab(5). # # <file system> <mount point> <type> <options> <dump> <pass> # / was on /dev/sdb2 during curtin installation /dev/disk/by-uuid/618296f2-84ee-4837-9f2a-a550c39a4001 / ext4 defaults 0 0 # /boot/efi was on /dev/sdb1 during curtin installation /dev/disk/by-uuid/EDE7-EF2D /boot/efi vfat defaults 0 0 /swap.img none swap sw 0 0