# basic configuration # New Page # screen ```bash vim /etc/screenrc ``` ```bash hardstatus string "%h%? users: %u%?" startup_message off hardstatus alwayslastline "hetzner03: %-Lw%{= BW}%50>%n%f* %t%{-}%+Lw%<" bindkey -k k7 prev bindkey -k k8 next ``` # network The following method allows to change the name of interfaces in ubuntu. The network card below some how is not good recogized by default, one interface is named renameX by default. With this method I assign it the name `enp1s0` by configuration. First I get all mac addesses of my interfaces ```bash ip a ``` ```bash 1: lo: mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: rename2: mtu 1500 qdisc noop state DOWN group default qlen 1000 link/ether 00:07:43:0c:32:12 brd ff:ff:ff:ff:ff:ff 3: enp130s0: mtu 1500 qdisc mq state UP group default qlen 1000 link/ether 00:07:43:0c:32:13 brd ff:ff:ff:ff:ff:ff inet 10.7.10.70/24 brd 10.7.10.255 scope global dynamic enp130s0 valid_lft 5639sec preferred_lft 5639sec inet6 fe80::207:43ff:fe0c:3213/64 scope link valid_lft forever preferred_lft forever ``` Then I enable the feature in the grub configuration to set my own interface names. ```bash vim /etc/default/grub ``` ```bash GRUB_CMDLINE_LINUX="net.ifnames=0 biosdevname=0" ``` Apply the new configuration ```bash grub-mkconfig -o /boot/grub/grub.cfg ``` ```bash update-grub update-initramfs -u ``` Configure the new names per mac address ```bash vim /etc/udev/rules.d/70-persistent-net.rules ``` ```bash SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:07:43:0c:32:12", NAME="enp1s0" SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:07:43:0c:32:13", NAME="enp2s0" ``` # nameserver In my LAN I want to make use of the DNS of my OPNsense router, there for I change the setup of ubuntu to use if via the following configuration. ```bash systemctl stop systemd-resolved ``` ```bash systemctl disable systemd-resolved ``` ```bash vim /etc/resolv.conf ``` ```bash search home nameserver 10.7.10.254 ``` # wipe hdd ```bash wipefs -a /dev/sda ``` # time synchronization ```bash apt install ntp ntpdate -y ``` ```bash mv /etc/ntp.conf /etc/ntp.conf.orig vim /etc/ntp.conf ``` ```bash server 10.8.10.254 prefer iburst ``` ```bash timedatectl set-ntp no ``` ```bash service ntp restart ``` ```bash ntpq -p ntpdate 10.8.10.254 ``` # lvm Check the physical volumes ```bash pvs ``` ```bash PV VG Fmt Attr PSize PFree /dev/sda3 ubuntu-vg lvm2 a-- <2.73t 0 ``` Check the volume groups ```bash vgs ``` ```bash VG #PV #LV #SN Attr VSize VFree ubuntu-vg 1 2 0 wz--n- <2.73t 0 ``` Check the logical volumes ```bash lvs ``` ```bash LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert plot01 ubuntu-vg -wi-ao---- 2.53t ubuntu-lv ubuntu-vg -wi-ao---- 200.00g ``` Display volume group details ```bash vgdisplay ``` ```bash --- Volume group --- VG Name ubuntu-vg System ID Format lvm2 Metadata Areas 1 Metadata Sequence No 3 VG Access read/write VG Status resizable MAX LV 0 Cur LV 2 Open LV 2 Max PV 0 Cur PV 1 Act PV 1 VG Size <2.73 TiB PE Size 4.00 MiB Total PE 715140 Alloc PE / Size 715140 / <2.73 TiB Free PE / Size 0 / 0 VG UUID rY8uzZ-2Xrc-TdNR-lOWt-Fr4O-uAKY-H0UsRs ``` Create the additional logical volume ```bash lvcreate -l 663940 -n plot01 ubuntu-vg ``` Create filesystem ```bash mkfs.ext4 /dev/ubuntu-vg/plot01 ``` Get the new UUID ```bash blkid ``` ```bash /dev/mapper/ubuntu--vg-plot01: UUID="3107980c-8ee0-4f63-adeb-2d0f50fe2f5c" TYPE="ext4" ``` Add it to fstab ```bash vim /etc/fstab ``` ```bash UUID=3107980c-8ee0-4f63-adeb-2d0f50fe2f5c /home/chia/chia/chia-blockchain/plot01 ext4 errors=remount-ro 0 1 ``` # chrony ```bash apt install chrony -y ``` ```bash vim /etc/chrony/chrony.conf ``` ```bash server 10.8.20.254 iburst prefer ``` ```bash systemctl restart chronyd ``` ```bash chronyc sources ``` ```bash /sbin/hwclock --systohc ```