By default, gcc will compile your c/c++ program to 64-bit instructions. In order to compile to 32-bit you need to add a -m32 flag to the command line. For example, to compile a file called hello-world.c using a Linux terminal, you would do something like this:

$ gcc -m32 hello-world.c -o hello-world

If you get the following error:

fatal error: bits/predefs.h: No such file or directory

OK, so you’re running Fedora and you’re getting warnings that you’re running out of disk space on the root folder. What are your options?

The first thing to consider is resizing the root partition size. For that you can find instructions here

If that is not an option, then the next thing you probably should do is find out which folders/directories are causing the issue. You can use the du command and some piping to figure this out:

If Flatpak is not installed, then install it:

$ sudo dnf install -y flatpak # Fedora $ sudo apt install flatpak # Ubuntu-based $ sudo zypper install flatpak # SUSE $ sudo pacman -S flatpak # Arch-based

Since flathub.org is the most popular flatpak repository we will use the command line to enable it:

Here’s one from my archives. To reveal dot files in macOS Finder, open your Terminal (/Applications/Utilities) application and then enter,

defaults write com.apple.finder AppleShowAllFiles YES

Then restart Finder by holding down Option and Control, or right-clicking on the Finder’s icon in your Dock and choosing “Relaunch”.

To revert this behavior, simply change the YES to NO in that defaults command.

I recently bought an Epson ET-3850 printer from Costco to replace my HP OfficeJet which was about 10 years old and the family was starting to have issues with establishing a wi-fi connection to it on their Windoze laptops. It took quite a while to setup. The Epson seems to be doing the job. Time will tell, however I discovered that setting it up for Slackware would also take a bit of effort. Drivers are only available on the Epson website in RPM or DEB format so I had to create a Slackware package to install it. Here’s how I went about doing that.

1. gg Move to the first line of the file
2. G Move to the last line
3. gg=G Reindent the whole file
4. gv Reselect the last visual selection
5. < Jump to beginning of last visual selection
6. > Jump to end of last visual selection
7. ^ Move to first non-blank character of the line
8. g_ Move the last non-blank character of the line (but you remove trailing whitespace, right)
9. g_lD Delete all the trailing whitespace on the line
10. ea Append to the end of the current word
11. gf Jump to the file name under the cursor
12. xp Swap character forward
13. Xp Swap character backward
14. yyp Duplicate the current line
15. yapP Duplicate the current paragraph
16. dat Delete around an HTML tag, including the tag
17. dit Delete inside an HTML tag, excluding the tag
18. w Move one word to the right
19. b Move one word to the left
20. dd Delete the current line
21. zc Close current fold
22. zo Open current fold
23. za Toggle current fold
24. zi Toggle folding entirely
25. << Outdent current line
26. >> Indent current line
27. z= Show spelling corrections
28. zg Add to spelling dictionary
29. zw Remove from spelling dictionary
30. ~ Toggle case of current character
31. gUw Uppercase until end of word (u for lower, ~ to toggle)
32. gUiw Uppercase entire word (u for lower, ~ to toggle)
33. gUU Uppercase entire line
34. gu$ Lowercase until the end of the line
35. da" Delete the next double-quoted string
36. + Move to the first non-whitespace character of the next line
37. S Delete current line and go into insert mode
38. I insert at the beginning of the line
39. ci" Change what’s inside the next double-quoted string
40. ca{ Change inside the curly braces (try [, (, etc.)
41. vaw Visually select word
42. dap Delete the whole paragraph
43. r Replace a character
44. [ Jump to beginning of last yanked text
45. ] Jump to end of last yanked text
46. g; Jump to the last change you made
47. g, Jump back forward through the change list
48. & Repeat last substitution on current line
49. g& Repeat last substitution on all lines
50. ZZ Save the current file and quit Vim

If you’re a developer who is interested in “how the sausage is made” then you might want to check out Ian Lance Taylor’s blog which contains a series of articles discussed on Klaatu’s GNU World Order Episode 400 about the linker

Here are the links to the articles:

Linkers part 1 Linkers part 2 Linkers part 3 Linkers part 4 Linkers part 5 Linkers part 6

If you have FUSE (Filessystem in Userspace) installed, you can use SSH to mount a remote drive locally. This is very simple to do and you don’t need to be root. You just need SSH access to the remote system. Just create a directory to mount the system and use the sshfs command to connect the remote to it.

Here I will mount my home directory on my remote server named slacker locally to a directory on my laptop’s home directory:

On a recent episode of Hacker Public Radio, the host, Lee listed several note-taking apps that he had tried to use. One of them was Joplin which I have been using for several years now. I feel that it is probably one of the best note-taking apps available that:

• Supports Markdown
• Is cross-platform
• Supports vim keyboard mappings (I can’t live without this)
• Integrates with multiple cloud storage environments.

I use it on a daily basis for almost all of my notes but it also supports checklists on my iPhone, iPad, Windoze laptop, and all of my Slackware devices (desktop and laptops). Give it a try!

You should find a file in /var/log/packages for each SlackBuild that you have installed. You can distinguish the SlackBuilds package from standard Slackware packages by the substring SBo embedded in the filename. So you can create a list of all of the SlackBuilds installed on your machine by just doing an ls *SBo* in that directory.

ls /var/log/packages | grep SBo

or

ls /var/log/packages/*SBo