Omnia - Recent changes [en]

Git-Bash

Kenneth — Thu, 05 Nov 2026 20:23:51 GMT

Convert Windows Path to Cygwin Path

← Older revision		Revision as of 20:23, 5 November 2026
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	cd `cygpath "C:\Windows"`		cd `cygpath "C:\Windows"`

	function ccd() { cd `cygpath $*` ; }		Add to .bashrc:
			# Example: ccd c:\program files
			function ccd() { cd "`cygpath "$*"`" ; }

	== Windows Terminal Profile ==		== Windows Terminal Profile ==

Cygwin

Kenneth — Thu, 05 Nov 2026 20:23:07 GMT

Convert Windows Path to Cygwin Path

← Older revision		Revision as of 20:23, 5 November 2026
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	cd `cygpath "C:\Windows"`		cd `cygpath "C:\Windows"`

			function ccd() { cd "`cygpath "$*"`" ; }
			# Example: ccd c:\program files

	== Silent Install ==		== Silent Install ==

Git-Bash

Kenneth — Thu, 05 Nov 2026 20:20:38 GMT

Convert Windows Path to Cygwin Path

← Older revision		Revision as of 20:20, 5 November 2026
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			== Git-Bash ==

			== Convert Windows Path to Cygwin Path ==

			cygpath "C:\Windows"

			cd `cygpath "C:\Windows"`

			function ccd() { cd `cygpath $*` ; }

	== Windows Terminal Profile ==		== Windows Terminal Profile ==

Cygwin

Kenneth — Thu, 05 Nov 2026 20:14:41 GMT

Determin Path to environment

← Older revision		Revision as of 20:14, 5 November 2026
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	Convert from Cygwin path to Windows path:		Convert from Cygwin path to Windows path:
	cygpath -w ~		cygpath -w ~

			== Convert Windows Path to Cygwin Path ==

			cygpath "C:\Windows"

			cd `cygpath "C:\Windows"`

	== Silent Install ==		== Silent Install ==

Git-Bash

Kenneth — Thu, 05 Nov 2026 19:24:22 GMT

CD to Home

← Older revision		Revision as of 19:24, 5 November 2026
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	ssh username@hostname_or_ip '"C:\Program Files\Git\bin\sh.exe" --login -c "./my_program"'		ssh username@hostname_or_ip '"C:\Program Files\Git\bin\sh.exe" --login -c "./my_program"'

			== CD to Home ==

			--cd-to-home

			Default shortcut has:
			Target:
			"C:\Program Files\Git\git-bash.exe" --cd-to-home
			Start in:
			%HOMEDRIVE%%HOMEPATH%

	== Bashrc ==		== Bashrc ==

Git/bash

Kenneth — Thu, 05 Nov 2026 19:23:04 GMT

Created page with "See Git-Bash"

New page

See [[Git-Bash]]

Linux/ip

Kenneth — Tue, 03 Nov 2026 22:35:09 GMT

Show address

← Older revision		Revision as of 22:35, 3 November 2026
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	apt install iproute2		apt install iproute2

			== Show address ==

			Show addresses
			ip a
			ip addr

			Show addresses (ditto)
			ip a s
			ip addr show

			Just show eno1
			ip a s eno1
			ip addr show eno1

			To show just a virtual interface (alias) you have to grep (doesn't work like 'ifconfig eno1:0' did)
			ip addr show eno1 \| grep eno1:1

	== Add static IP ==		== Add static IP ==

Netplan

Kenneth — Tue, 03 Nov 2026 22:28:42 GMT

dhcp

← Older revision		Revision as of 22:28, 3 November 2026
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	ref: https://github.com/canonical/netplan/blob/main/examples/dhcp.yaml		ref: https://github.com/canonical/netplan/blob/main/examples/dhcp.yaml

			=== dhcp with virtual static ===

			Get dhcp but also assign a static virtual address
			<pre>
			network:
			version: 2
			renderer: networkd
			ethernets:
			eno1:
			dhcp4: true
			addresses:
			- 192.168.2.100/24:
			label: "eno1:0"
			</pre>

	== vlan ==		== vlan ==

Linux/nfs

Kenneth — Tue, 03 Nov 2026 22:19:58 GMT

Restart NFS Client

← Older revision		Revision as of 22:19, 3 November 2026
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	sudo ip addr del <SERVER_IP>/32 dev lo		sudo ip addr del <SERVER_IP>/32 dev lo

			# to get ip address of connections
			grep -R . /sys/kernel/debug/sunrpc/rpc_clnt/*/xprt

			Method 4: Clear the Stuck Kernel Threads
			sudo systemctl stop nfs-client.target
			sudo nfsidmap -c
			sudo systemctl start nfs-client.target

	Long term fix:		Long term fix:

Tcpdump

Kenneth — Tue, 03 Nov 2026 21:47:06 GMT

nfs

← Older revision		Revision as of 21:47, 3 November 2026
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	Capture packets and specify both IP and port <ref>https://serverfault.com/questions/1025292/how-to-specify-both-ip-address-and-port-in-tcpdump</ref>		Capture packets and specify both IP and port <ref>https://serverfault.com/questions/1025292/how-to-specify-both-ip-address-and-port-in-tcpdump</ref>
	tcpdump -i enp1s9 dst 192.168.6.1 and src 192.168.6.2 and src port 80		tcpdump -i enp1s9 dst 192.168.6.1 and src 192.168.6.2 and src port 80

			== nfs ==

			tcpdump -i eth0 -nn port 2049

			sudo tcpdump -i any -n port 2049

	== ipv6 ==		== ipv6 ==

Linux/nfs

Kenneth — Tue, 03 Nov 2026 21:41:39 GMT

Restart NFS Client

← Older revision		Revision as of 21:41, 3 November 2026
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	== Restart NFS Client ==		== Restart NFS Client ==

			Stuck nfs:
			umount -f -l /nfs-mount

	You forced lazy unmount, but now your dmesg is still filled with:		You forced lazy unmount, but now your dmesg is still filled with:
Line 5:		Line 8:
	[4321031.750618] nfs: server my-nfs-store not responding, timed out		[4321031.750618] nfs: server my-nfs-store not responding, timed out

	~~Restart client nfs services~~:		Method 1: Flush the Kernel RPC State
	sudo systemctl restart nfs-client.target rpcbind		sudo systemctl restart nfs-client.target rpcbind

	~~change~~ /etc/fstab to:		Method 2: Flush the System Inode & Dentry Caches
			sudo sync
			sudo echo 2 > /proc/sys/vm/drop_caches

			Method 3: Temporarily Fake the Network Target (The "Trick" Fix)
			# Assign that IP to your loopback interface (should be in the log)
			sudo ip addr add <SERVER_IP>/32 dev lo
			# wait 30 seconds, for it to get rejected, then..
			sudo ip addr del <SERVER_IP>/32 dev lo


			Long term fix:

			Change /etc/fstab to:
	MYNFSSERVER:/shared_dir /mnt/your_mount_point nfs rw,soft,intr,bg,timeo=100,retrans=2 0 0		MYNFSSERVER:/shared_dir /mnt/your_mount_point nfs rw,soft,intr,bg,timeo=100,retrans=2 0 0

	• soft: Tells the client to return an I/O error to the application after a timeout, instead of hanging forever.		* soft: Tells the client to return an I/O error to the application after a timeout, instead of hanging forever.
	• intr: Allows you to interrupt stuck processes (like using Ctrl + C).		* intr: Allows you to interrupt stuck processes (like using Ctrl + C).
	• bg: If the server is offline during a system reboot, Ubuntu will mount it in the background instead of stalling your entire boot process.		* bg: If the server is offline during a system reboot, Ubuntu will mount it in the background instead of stalling your entire boot process.
	• timeo=100: Sets the timeout to 10 seconds before retrying.		* timeo=100: Sets the timeout to 10 seconds before retrying.

			== keywords ==

Linux/nfs

Kenneth — Tue, 03 Nov 2026 21:32:05 GMT

Created page with "== Restart NFS Client == You forced lazy unmount, but now your dmesg is still filled with: [4321018.374470] nfs: server my-nfs-store not responding, timed out [4321031.750618] nfs: server my-nfs-store not responding, timed out Restart client nfs services: sudo systemctl restart nfs-client.target rpcbind change /etc/fstab to: MYNFSSERVER:/shared_dir /mnt/your_mount_point nfs rw,soft,intr,bg,timeo=100,retrans=2 0 0 • soft: Tells the client to return an I/O e..."

New page

== Restart NFS Client ==

You forced lazy unmount, but now your dmesg is still filled with:
[4321018.374470] nfs: server my-nfs-store not responding, timed out
[4321031.750618] nfs: server my-nfs-store not responding, timed out

Restart client nfs services:
sudo systemctl restart nfs-client.target rpcbind

change /etc/fstab to:
MYNFSSERVER:/shared_dir /mnt/your_mount_point nfs rw,soft,intr,bg,timeo=100,retrans=2 0 0

• soft: Tells the client to return an I/O error to the application after a timeout, instead of hanging forever.
• intr: Allows you to interrupt stuck processes (like using Ctrl + C).
• bg: If the server is offline during a system reboot, Ubuntu will mount it in the background instead of stalling your entire boot process.
• timeo=100: Sets the timeout to 10 seconds before retrying.

Ubuntu/apt-daily

Kenneth — Tue, 03 Nov 2026 21:28:07 GMT

Stuck on wait-online

← Older revision		Revision as of 21:28, 3 November 2026
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	* add "--timeout=5" to ExecStart:		* add "--timeout=5" to ExecStart:
	** ExecStart=/lib/systemd/systemd-networkd-wait-online --timeout=5		** ExecStart=/lib/systemd/systemd-networkd-wait-online --timeout=5
			* OR
			** ExecStart=/lib/systemd/systemd-networkd-wait-online -i eno1
	* Reboot, and it should skip network check		* Reboot, and it should skip network check

			systemctl daemon-reload
			systemctl restart systemd-networkd-wait-online
			systemctl status systemd-networkd-wait-online

	Hack solution #2:		Hack solution #2:

Linux/Time

Kenneth — Tue, 03 Nov 2026 21:27:15 GMT

Time Zones

← Older revision		Revision as of 21:27, 3 November 2026
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	export TZ=America/Denver		export TZ=America/Denver

			Restart syslog
			systemctl restart syslog
			systemctl restart rsyslog
			logger test ; tail /var/log/syslog

	In Linux, most timezone information is controlled by GLIBC, which relies on the file /etc/localtime. Different distributions do different things with this file; some have it as a symbolic link to the proper timezone definition file (usually in /usr/share/zoneinfo), but most have it as an actual, explicit file.		In Linux, most timezone information is controlled by GLIBC, which relies on the file /etc/localtime. Different distributions do different things with this file; some have it as a symbolic link to the proper timezone definition file (usually in /usr/share/zoneinfo), but most have it as an actual, explicit file.

Python/Line Length

Kenneth — Tue, 03 Nov 2026 20:13:50 GMT

Created page with "== .editorconfig == <pre> # Project-wide line length. Keep in sync with pyproject.toml. [*.py] max_line_length = 99 </pre> == .flake8 == <pre> # Project-wide line length. Keep in sync with pyproject.toml. [flake8] max-line-length = 99 </pre> == pyproject.toml == <pre> [build-system] requires = ["setuptools>=68"] build-backend = "setuptools.build_meta" [project] name = "MYPROJECTNAME" version = "0.1.0" requires-python = ">=3.8" [tool.setuptools.packages.find] where..."

New page

== .editorconfig ==

<pre>
# Project-wide line length. Keep in sync with pyproject.toml.
[*.py]
max_line_length = 99
</pre>

== .flake8 ==

<pre>
# Project-wide line length. Keep in sync with pyproject.toml.
[flake8]
max-line-length = 99
</pre>

== pyproject.toml ==

<pre>
[build-system]
requires = ["setuptools>=68"]
build-backend = "setuptools.build_meta"

[project]
name = "MYPROJECTNAME"
version = "0.1.0"
requires-python = ">=3.8"

[tool.setuptools.packages.find]
where = ["."]
include = ["MYPROJECTNAME*"]
exclude = ["MYPROJECTNAME.egg-info*"]

# Project-wide line length: 99. flake8 and pycodestyle (pep8) cannot read
# pyproject.toml; keep .flake8, setup.cfg and .editorconfig in sync.
[tool.black]
line-length = 99

[tool.pylint.format]
max-line-length = 99

[tool.ruff]
line-length = 99

[tool.autopep8]
max_line_length = 99

[tool.isort]
line_length = 99

[tool.yapf]
column_limit = 99
</pre>

== setup.cfg ==

<pre>
# Project-wide line length. Keep in sync with pyproject.toml.
[pycodestyle]
max-line-length = 99
</pre>

== .pre-commit-config.yaml ==

<pre>
# See https://pre-commit.com for more information
# See https://pre-commit.com/hooks.html for more hooks
repos:
- repo: https://github.com/pre-commit/pre-commit-hooks
rev: v3.2.0
hooks:
- id: trailing-whitespace
- id: end-of-file-fixer
- id: check-yaml
- id: check-added-large-files
# Line length only (limit comes from .flake8). Scoped to files already within
# the limit; add files to the list as they are cleaned up.
- repo: https://github.com/PyCQA/flake8
rev: 7.5.0
hooks:
- id: flake8
name: flake8 (line length)
args: [--select=E501]
files: ^(\.github/actions/jenkins-trigger/jenkins-trigger\.py|devtools/devops/jenkins\.py)$
# Future: once the devtools/ folder is within the limit, replace the hook above
# with this one to check every Python file under devtools/. Delete the `files:`
# line to check every Python file in the repository instead.
# - repo: https://github.com/PyCQA/flake8
# rev: 7.5.0
# hooks:
# - id: flake8
# name: flake8 (line length)
# args: [--select=E501]
# files: ^devtools/
</pre>

Sample devtools/devops/jenkins.py coverage

APT

Kenneth — Tue, 03 Nov 2026 18:30:37 GMT

Could not get lock

← Older revision		Revision as of 18:30, 3 November 2026
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	rm /var/lib/dpkg/lock		rm /var/lib/dpkg/lock
	dpkg --configure -a		dpkg --configure -a

			Proper way to clear apt lock (per Ubuntu Teams): <ref>https://askubuntu.com/questions/1109982/e-could-not-get-lock-var-lib-dpkg-lock-frontend-open-11-resource-temporari</ref>
			sudo fuser -vki -TERM /var/lib/dpkg/lock /var/lib/dpkg/lock-frontend
			sudo dpkg --configure --pending

	=== The following packages have been kept back ===		=== The following packages have been kept back ===

Ubuntu/apt-daily

Kenneth — Tue, 03 Nov 2026 18:23:07 GMT

Stuck on wait-online

← Older revision		Revision as of 18:23, 3 November 2026
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	sudo systemctl mask systemd-networkd-wait-online.service		sudo systemctl mask systemd-networkd-wait-online.service
	</pre>		</pre>

			Solution #3:
			* add "optional: true" to interfaces that are not connected in your netplan

	ref:		ref:
	* https://www.reddit.com/r/Ubuntu/comments/16xi5h0/how_do_i_fix_systemdnetworkdwaitonlineservice/		* https://www.reddit.com/r/Ubuntu/comments/16xi5h0/how_do_i_fix_systemdnetworkdwaitonlineservice/

Ubuntu/apt-daily

Kenneth — Tue, 03 Nov 2026 18:21:33 GMT

Created page with "== Stuck on wait-online == <pre> systemd[1]: Starting apt-daily.service - Daily apt download activities... systemd-networkd-wait-online[1336808]: Timeout occurred while waiting for network connectivity. apt-helper[1336806]: E: Sub-process /lib/systemd/systemd-networkd-wait-online returned an error code (1) systemd[1]: apt-daily.service: Deactivated successfully. systemd[1]: Finished apt-daily.service - Daily apt download activities. </pre> Hack solution #1: * Edit /etc..."

New page

== Stuck on wait-online ==

<pre>
systemd[1]: Starting apt-daily.service - Daily apt download activities...
systemd-networkd-wait-online[1336808]: Timeout occurred while waiting for network connectivity.
apt-helper[1336806]: E: Sub-process /lib/systemd/systemd-networkd-wait-online returned an error code (1)
systemd[1]: apt-daily.service: Deactivated successfully.
systemd[1]: Finished apt-daily.service - Daily apt download activities.
</pre>

Hack solution #1:
* Edit /etc/systemd/system/network-online.target.wants/systemd-networkd-wait-online.service
* add "--timeout=5" to ExecStart:
** ExecStart=/lib/systemd/systemd-networkd-wait-online --timeout=5
* Reboot, and it should skip network check

Hack solution #2:
<pre>
sudo systemctl disable systemd-networkd-wait-online.service
sudo systemctl mask systemd-networkd-wait-online.service
</pre>

ref:
* https://www.reddit.com/r/Ubuntu/comments/16xi5h0/how_do_i_fix_systemdnetworkdwaitonlineservice/

WinGet

Kenneth — Mon, 02 Nov 2026 20:26:59 GMT

dos2unix

← Older revision		Revision as of 20:26, 2 November 2026
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	Available natively:		Available natively:
	dism /online /Enable-Feature /FeatureName:TelnetClient		dism /online /Enable-Feature /FeatureName:TelnetClient

			=== dos2unix ===

			winget install -e --id waterlan.dos2unix

			winget install -e --id waterlan.dos2unix --scope machine

			dos2unix
			unix2dos

	== Download and Redeploy ==		== Download and Redeploy ==