Linux: Difference between revisions
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== General == | Subpages | ||
<splist sortby="title" liststyle="unordered" showpath="no" kidsonly="no" debug="0" /> | |||
==General== | |||
===Offline dictionary === | |||
==== Golden Dict with WordNet 3.0 ==== | |||
[[File:GoldenDict-rescan-dictionaries.png|thumb]] | [[File:GoldenDict-rescan-dictionaries.png|thumb]] | ||
Install the [[wikipedia:GoldenDict|GoldenDict]] dictionary application for your Linux distribution. | Install the [[wikipedia:GoldenDict|GoldenDict]] dictionary application for your Linux distribution. | ||
| Line 7: | Line 15: | ||
By default, the application only seems to use online dictionaries for English to English dictionaries. | By default, the application only seems to use online dictionaries for English to English dictionaries. | ||
Download the free offline dictionary Wordnet3 from [ | Download the free offline dictionary Wordnet3 from [http://downloads.sourceforge.net/goldendict/WordNet3.0_1.0.zip here]. | ||
Unzip the downloaded file and place the file that ends with .dz in /usr/share/ | Unzip the downloaded file and place the file that ends with .dz in /usr/share/goldendict | ||
Now open GoldenDict. Go to Edit -> Dictionaries (or press F3). Under the Sources -> Files, you'll see the directories that GoldenDict looks for dictionary files. Press the "Rescan now" button in the right pane to index the newly added dictionary. | Now open GoldenDict. Go to Edit -> Dictionaries (or press F3). Under the Sources -> Files, you'll see the directories that GoldenDict looks for dictionary files. Use the "Add" button if /usr/share/goldendict is not on the path. Press the "Rescan now" button in the right pane to index the newly added dictionary. | ||
''Optional:'' You can also make WordNet3 the dictionary with the highest priority by dragging it to the top in the ''Dictionaries'' tab. | ''Optional:'' You can also make WordNet3 the dictionary with the highest priority by dragging it to the top in the ''Dictionaries'' tab. | ||
== Network Tricks == | ==Network Tricks== | ||
=== Connecting to two networks - one Wi-Fi and one wired === | ===Connecting to two networks - one Wi-Fi and one wired=== | ||
Wi-Fi network has internet, wired does not. Then, disable the gateway of the Wired network for internet access. | Wi-Fi network has internet, wired does not. Then, disable the gateway of the Wired network for internet access. | ||
| Line 33: | Line 41: | ||
<code>$ sudo ip route del default via 192.168.1.1</code> | <code>$ sudo ip route del default via 192.168.1.1</code> | ||
== | ==Gnome tricks== | ||
=== | ===Creating a desktop launcher on Gnome=== | ||
Install '''gnome-panel''' | |||
<pre> | <pre> | ||
sudo apt-get install --no-install-recommends gnome-panel | |||
</pre> | </pre> | ||
Open the '''Create Launcher''' dialog and enter the details for the launcher | |||
<pre> | <pre> | ||
sudo gnome-desktop-item-edit --create-new /usr/share/applications | |||
</pre> | </pre> | ||
Done. | |||
< | <br /> | ||
=== Reset Gnome configuration === | |||
Run this command as your user | |||
<code>dconf reset -f /org/gnome/</code> | |||
== | Logout and login. | ||
==Video Editing== | |||
===Trimming a video=== | |||
ffmpeg can be used to quickly trim a video from a given start time to end time. | |||
<pre> | <pre> | ||
ffmpeg -i video.webm -ss 00:00:00 -t 00:05:04 -c copy video-cut.webm | |||
</pre> | </pre> | ||
ss and t can be skipped in case of start of video or end of video respectively. The same works for mp3 files. | |||
See [https://stackoverflow.com/questions/7333232/how-to-concatenate-two-mp4-files-using-ffmpeg/11175851#11175851 this] for joining videos. | |||
== | == PDF Editing == | ||
Using PDF toolkit on Debian to merge or split PDF files - http://net2.com/how-to-install-and-use-pdftk-on-linux-to-merge-or-split-pdf-files/ | |||
pdfsam is another alternative which I didn't use. | |||
==Ebooks== | |||
== Create ebook from a website using Calibre == | ===Create ebook from a website using Calibre=== | ||
Some free books on the internet are available as HTML pages. <br> | Some free books on the internet are available as HTML pages. <br> | ||
| Line 103: | Line 94: | ||
<pre> | <pre> | ||
wget -r --no-parent http://www.hpmor.com/ | wget -r --no-parent -erobots=off http://www.hpmor.com/ | ||
ebook-convert index.html hpmor.epub | ebook-convert index.html hpmor.epub | ||
</pre> | </pre> | ||
== | === Convert ebook to audiobook === | ||
I wrote a [https://book.babashka.org/ babashka] script for this: [https://njoseph.me/gitweb/babashka-scripts.git/blob/HEAD:/ebook-to-audio-book ebook-to-audiobook] | |||
=== Switch to Colemak layout in X window system === | ==X Window system tricks== | ||
===Switch to Colemak layout in X window system=== | |||
<pre> | <pre> | ||
setxkbmap us -variant colemak | setxkbmap us -variant colemak | ||
</pre> | </pre> | ||
=== Natural scrolling === | ===Natural scrolling=== | ||
Run the following command, then logout and login. | Run the following command, then logout and login. | ||
<pre> | <pre> | ||
| Line 120: | Line 114: | ||
</pre> | </pre> | ||
== VirtualBox tricks == | ==VirtualBox tricks== | ||
===Adding a new virtual USB disk to a virtual machine=== | |||
*Enable USB controller for the virtual machine. This can be done from the VirtualBox UI. | |||
*Create a new virtual disk and add it using the USB controller. | |||
*Run this command as root inside the box. | |||
# mkfs.ext4 /dev/sdb | # mkfs.ext4 /dev/sdb | ||
==GPG and Thunderbird== | |||
To renew an expired GPG primary key, | |||
<pre> | |||
gpg --edit-keys <key-id> | |||
>>> expire | |||
1y | |||
>>> save | |||
</pre> | |||
For subkeys, you have to first enter the key number like "key 1" | |||
Send the updated keys to several keyservers | |||
<pre> | |||
gpg --keyserver keyserver.ubuntu.com --send-keys <key-id> | |||
gpg --keyserver pgp.mit.edu --send-keys <key-id> | |||
</pre> | |||
Export the secret key to a file. | |||
<pre> | |||
gpg --output private.gpg --armor --export-secret-key <key-id> | |||
</pre> | |||
In Thunderbird, open PGP Key Manager and import the new key. | |||
Delete the above secret key file. | |||
Latest revision as of 20:15, 20 March 2024
Subpages
General
Offline dictionary
Golden Dict with WordNet 3.0
Install the GoldenDict dictionary application for your Linux distribution.
By default, the application only seems to use online dictionaries for English to English dictionaries.
Download the free offline dictionary Wordnet3 from here.
Unzip the downloaded file and place the file that ends with .dz in /usr/share/goldendict
Now open GoldenDict. Go to Edit -> Dictionaries (or press F3). Under the Sources -> Files, you'll see the directories that GoldenDict looks for dictionary files. Use the "Add" button if /usr/share/goldendict is not on the path. Press the "Rescan now" button in the right pane to index the newly added dictionary.
Optional: You can also make WordNet3 the dictionary with the highest priority by dragging it to the top in the Dictionaries tab.
Network Tricks
Connecting to two networks - one Wi-Fi and one wired
Wi-Fi network has internet, wired does not. Then, disable the gateway of the Wired network for internet access.
Show the networks
$ ip route show
Smaller metric number means higher priority for the gateway
Remove the gateway of the wired network
$ sudo ip route del default via 192.168.1.1
Gnome tricks
Creating a desktop launcher on Gnome
Install gnome-panel
sudo apt-get install --no-install-recommends gnome-panel
Open the Create Launcher dialog and enter the details for the launcher
sudo gnome-desktop-item-edit --create-new /usr/share/applications
Done.
Reset Gnome configuration
Run this command as your user
dconf reset -f /org/gnome/
Logout and login.
Video Editing
Trimming a video
ffmpeg can be used to quickly trim a video from a given start time to end time.
ffmpeg -i video.webm -ss 00:00:00 -t 00:05:04 -c copy video-cut.webm
ss and t can be skipped in case of start of video or end of video respectively. The same works for mp3 files.
See this for joining videos.
PDF Editing
Using PDF toolkit on Debian to merge or split PDF files - http://net2.com/how-to-install-and-use-pdftk-on-linux-to-merge-or-split-pdf-files/
pdfsam is another alternative which I didn't use.
Ebooks
Create ebook from a website using Calibre
Some free books on the internet are available as HTML pages.
An epub file is simply an archive of HTML pages that can be treated as an ebook.
A book website can be stitched into an ebook using wget and calibre
wget -r --no-parent -erobots=off http://www.hpmor.com/ ebook-convert index.html hpmor.epub
Convert ebook to audiobook
I wrote a babashka script for this: ebook-to-audiobook
X Window system tricks
Switch to Colemak layout in X window system
setxkbmap us -variant colemak
Natural scrolling
Run the following command, then logout and login.
echo "pointer = 1 2 3 5 4 6 7 8 9 10 11 12" >> ~/.Xmodmap
VirtualBox tricks
Adding a new virtual USB disk to a virtual machine
- Enable USB controller for the virtual machine. This can be done from the VirtualBox UI.
- Create a new virtual disk and add it using the USB controller.
- Run this command as root inside the box.
# mkfs.ext4 /dev/sdb
GPG and Thunderbird
To renew an expired GPG primary key,
gpg --edit-keys <key-id> >>> expire 1y >>> save
For subkeys, you have to first enter the key number like "key 1"
Send the updated keys to several keyservers
gpg --keyserver keyserver.ubuntu.com --send-keys <key-id> gpg --keyserver pgp.mit.edu --send-keys <key-id>
Export the secret key to a file.
gpg --output private.gpg --armor --export-secret-key <key-id>
In Thunderbird, open PGP Key Manager and import the new key. Delete the above secret key file.
