---
type: "topic"
created: "2024-01-29T05:19:01.392Z"
updated: "2024-04-15T16:14:53.254Z"
---

# Ubuntu

- [Barcode Host](../.kanbn/tasks/barcode-host.md)

```bash
lsb_release -a
sudo -l
timedatectl set-timezone America/Phoenix
find / -name "secrets.json" 2>/dev/null
ls -1 | wc -l
cp -R -u -p /source /destination
```

```bash
cd /home
# directory percent tree
ncdu
```

```bash
adduser syncthing
```

```bash
# Free space
df -h --total
vgdisplay
lvdisplay
lsblk
```

```bash
# mount
mount /dev/sda4 /mnt
umount /dev/sda4
# mount -o remount,uid=1000,gid=1000,rw /dev/sda4
# mount -t ntfs -o nls=utf8,umask=0222 /dev/sda4 /mnt
# mount -t ntfs -o ro /dev/sda4 /mnt
# mkdir /home/mike/1-Images-A
# mount --bind /mnt/1-Images-A /home/mike/1-Images-A
# mount -o remount,rw /home/mike/1-Images-A
# umount /home/mike/1-Images-A
# rm -R /home/mike/1-Images-A
mkfs -t ext4 /dev/sda4
mount /dev/sda4 /mnt
blkid
```

```conf
/dev/sda4: UUID="27753635-40b1-4f21-8f6c-28b1c1997cfb" BLOCK_SIZE="4096" TYPE="ext4" PARTLABEL="Basic data partition" PARTUUID="b920a38c-4682-4c16-9abd-a385fd57b29d"
```

```bash
# https://askubuntu.com/questions/45607/how-to-mount-partition-permanently
nano /etc/fstab
```

```conf
/dev/disk/by-uuid/27753635-40b1-4f21-8f6c-28b1c1997cfb /mnt ext4 defaults 0 2
```

```bash
fdisk -l
lvdisplay
lvm lvextend -l +100%FREE /dev/ubuntu-vg/ubuntu-lv
esize2fs -p /dev/mapper/ubuntu--vg-ubuntu--lv
```

```bash
apt-get install lshw
lshw -class disk -class storage
lshw -html > /var/www/html/my-specs.html
nano /var/www/html/my-specs.html
apt-get install smartmontools
smartctl -i /dev/sda
apt-get install hdparm
hdparm -I /dev/sda
```

```yaml
Device Model:     256GB SSD
Serial Number:    CM42ABH1005410
LU WWN Device Id: 5 3a5a27 0100c22ca
Firmware Version: SN11842
User Capacity:    256,060,514,304 bytes [256 GB]
Sector Size:      512 bytes logical/physical
Rotation Rate:    Solid State Device
Form Factor:      M.2
TRIM Command:     Available, deterministic, zeroed
Device is:        Not in smartctl database 7.3/5319
ATA Version is:   ACS-4 (minor revision not indicated)
SATA Version is:  SATA 3.2, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:    Mon Feb 26 16:48:42 2024 MST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled
```

```bash
# https://stackoverflow.com/questions/338037/how-to-check-permissions-of-a-specific-directory
ls -la
namei -l
getfacl
stat -c "%n %a"
```

```bash
# https://www.cyberciti.biz/faq/how-to-use-sed-to-find-and-replace-text-in-files-in-linux-unix-shell/
sed -i 's/net8.0/net6.0/g' Shared/OI.Metrology.Shared.csproj
```

```bash
# all users
compgen -u
# all groups
compgen -g
usermod -a -G docker mike
groups list mike
```

```bash
# https://stackoverflow.com/questions/49249375/how-to-disable-cloud-init-networking
/etc/cloud/cloud.cfg.d/99-disable-network-config.cfg
```

```yaml
network: {config: disabled}
```

```bash
# https://intercom.help/privatevpn/en/articles/6440374-how-to-disable-ipv6-on-ubuntu-and-fedora-linux
nano /etc/sysctl.conf
```

```conf
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
net.ipv6.conf.lo.disable_ipv6 = 1
```

```bash
sysctl -p
cat /proc/sys/net/ipv6/conf/all/disable_ipv6
```

```bash
# https://www.omgubuntu.co.uk/2021/07/enable-minimize-click-ubuntu-dock
gsettings set org.gnome.shell.extensions.dash-to-dock click-action 'minimize'
```

```bash
# View package virtual IP per Peter Kim
mviewcl
```