Ubuntu/Quick Reference - Revision history

R00t: /* systemd resolved not resolving local dns names */

2023-09-05T04:52:17Z

‎systemd resolved not resolving local dns names

R00t at 07:18, 4 September 2023

2023-09-04T07:18:07Z

R00t at 03:58, 16 January 2022

2022-01-16T03:58:37Z

R00t: /* Check your work */

2019-09-16T18:54:57Z

‎Check your work

R00t: /* Expand root disk on VM */

2019-09-16T17:21:05Z

‎Expand root disk on VM

R00t at 15:01, 16 September 2019

2019-09-16T15:01:37Z

R00t at 15:01, 16 September 2019

2019-09-16T15:01:19Z

R00t at 14:56, 16 September 2019

2019-09-16T14:56:57Z

R00t: /* Create filesystem and enable swap */

2019-09-16T14:45:37Z

‎Create filesystem and enable swap

R00t: /* Expand root disk on VM */

2019-09-16T14:45:23Z

‎Expand root disk on VM

@@ Line 370: / Line 370: @@
 DNS=10.0.160.1
 FallbackDNS=10.0.161.1
-Domains=local
+Domains=local</nowiki>
-MulticastDNS=yes</nowiki>
 restart service
-  <nowiki>~$systemctl restart systemd-resolved.service</nowiki>
+  <nowiki>~$ systemctl restart systemd-resolved.service</nowiki>

← Older revision		Revision as of 07:18, 4 September 2023
Line 362:		Line 362:
	### Automatically suspend sinks/sources that become idle for too long		### Automatically suspend sinks/sources that become idle for too long
	load-module module-suspend-on-idle</nowiki>		load-module module-suspend-on-idle</nowiki>
		+
		+	=systemd resolved not resolving local dns names=
		+	update resolvd conf
		+	<nowiki>~$ vim /etc/systemd/resolved.conf
		+	...
		+	[Resolve]
		+	DNS=10.0.160.1
		+	FallbackDNS=10.0.161.1
		+	Domains=local
		+	MulticastDNS=yes</nowiki>
		+	restart service
		+	<nowiki>~$systemctl restart systemd-resolved.service</nowiki>

← Older revision		Revision as of 03:58, 16 January 2022
Line 352:		Line 352:
	tmpfs tmpfs 100K 0 100K 0% /run/lxcfs/controllers		tmpfs tmpfs 100K 0 100K 0% /run/lxcfs/controllers
	tmpfs tmpfs 200M 0 200M 0% /run/user/1000</nowiki>		tmpfs tmpfs 200M 0 200M 0% /run/user/1000</nowiki>
		+
		+	=Targus Dock crashing fix=
		+	On Ubuntu 20.04, the targus 190 USZ dock would repeatedly crash a few times a day, sometimes causing the dock to freeze entirely, most of the time just causing the screens to blink on/off and my audio switching back to default speakers.<br>
		+	I found that by disabling the pulse audio idle autooff feature greatly decreased the crashes (none thus far).<br>
		+	<br>
		+	Comment out the line below
		+	<nowiki>~$ vim /etc/pulse/default.pa
		+	...
		+	### Automatically suspend sinks/sources that become idle for too long
		+	load-module module-suspend-on-idle</nowiki>

@@ Line 334: / Line 334: @@
 Mem:           1991          85        1586           3         320        1856
 Swap:          2047           0        2047
 ~$ sudo df -Th
 Filesystem     Type      Size  Used Avail Use% Mounted on

@@ Line 190: / Line 190: @@
 ==Expand root disk on VM==
 In this scenario, I needed to expand the disk on a non-LVM ubuntu installation.  Nothing particularly special about this setup thankfully, just has the default partition configuration:
-  <nowiki>~$ fdisk -l
+  <nowiki>~$ sudo fdisk -l
 ....
 Device     Boot    Start      End  Sectors Size Id Type

@@ Line 333: / Line 333: @@
                total        used        free      shared  buff/cache   available
 Mem:           1991          85        1586           3         320        1856
-Swap:          2047           0        2047</nowiki>
+Swap:          2047           0        2047

@@ Line 259: / Line 259: @@
 ~$ sudo growpart /dev/sda 1
 CHANGED: partition=1 start=2048 old: size=79689728 end=79691776 new: size=205518848,end=205520896</nowiki>
 ===Create new swap partitions===

← Older revision		Revision as of 14:56, 16 September 2019
Line 324:		Line 324:
	/dev/fd0 /media/floppy0 auto rw,user,noauto,exec,utf8 0 0</nowiki>		/dev/fd0 /media/floppy0 auto rw,user,noauto,exec,utf8 0 0</nowiki>
	<br>'''Moment of truth. Reboot.'''		<br>'''Moment of truth. Reboot.'''
		+	===Check your work===
		+	<nowiki>~$ sudo swapon --show
		+	NAME TYPE SIZE USED PRIO
		+	/dev/sda5 partition 2G 0B -1
		+	~$ sudo free -m
		+	total used free shared buff/cache available
		+	Mem: 1991 85 1586 3 320 1856
		+	Swap: 2047 0 2047</nowiki>

@@ Line 323: / Line 323: @@
 UUID=c9462e3f-f306-484e-b8b4-cf4a680fab87 none            swap    sw              0       0
 /dev/fd0        /media/floppy0  auto    rw,user,noauto,exec,utf8 0       0</nowiki>
-<br><br>'''Moment of truth.  Reboot.'''
+<br>'''Moment of truth.  Reboot.'''

@@ Line 212: / Line 212: @@
 ===Disable swap and remove partitions===
 With the root partition starting from the beginning of the disk, in order to expand it the swap partition has to be deleted and recreated.  Thankfully since the swap should not be mounted, this is pretty easy.
-  <nowiki> ~$ sudo swapoff -a
+  <nowiki>~$ sudo swapoff -a
 ~$ sudo lsblk
 NAME   MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
@@ Line 245: / Line 245: @@
 ===Extend root partition===
-'''WARNING:''' the following section is '''HACKY''' to say the least.  Unfortunately i dont know a better way of doing it yet.
+'''WARNING:''' the following section is '''HACKY''' to say the least.  Unfortunately i dont know a better way of doing it yet.<br>
 ===Create new swap partitions===
-Before we can grow the primary partition, we need to recreate our swap partition(s).  We are going to setup a new Extended partition at the new end of the disk.  I've chosen 2GB as my RAM is set to 2GB.
+With the root partition extedned, we need to recreate our swap partition(s).  We are going to setup a new Extended partition at the new end of the disk.  I've chosen 2GB as my RAM is set to 2GB.  We are using <code>fdisk</code> as I do not know of another way to create an Extended partition that is not a "Win95 Extended" partition.
-  <nowiki>~$ sudo parted -s /dev/sda unit GiB mkpart extended 98GiB 100%
+  <nowiki> ~$ sudo parted /dev/sda rm 2
-~$ sudo parted -l
+~$ ~$ sudo fdisk /dev/sda
-Model: Msft Virtual Disk (scsi)
-Disk /dev/sda: 107GB
+Welcome to fdisk (util-linux 2.27.1).
-Sector size (logical/physical): 512B/4096B
+Changes will remain in memory only, until you decide to write them.
-Partition Table: msdos
+Be careful before using the write command.
-Disk Flags:
-Number  Start   End     Size    Type      File system  Flags
+Created a new partition 2 of type 'Extended' and of size 2 GiB.
-      1049kB  40.8GB  40.8GB  primary   ext4         boot
-     105GB   107GB   2147MB  extended               lba
-sudo parted -s -a optimal /dev/sda unit s mkpart logical linux-swap 205520897 100%
+===Create filesystem and enable swap===