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  • 77 votes cast
Jan
29
comment How do I open the man page for square brackets math and what are they called?
Wow, I had no idea $[] was a thing. I expected from the title that the answer was going to be man '['. (i.e. test)
Jan
18
comment What version of Ubuntu should I pick?
I just picked Ubuntu/Kubuntu as an example. They all still use the same repos. I assumed the OP would be smart enough to pick the 32bit version if he actually has an old Atom CPU that can't run 64bit code. Why do you get worse perf with 64bit? Are you forced to run some 32bit-only program like Skype, so both versions of libraries would have to be in memory at the same time?
Jan
18
answered What version of Ubuntu should I pick?
Jan
18
comment What version of Ubuntu should I pick?
In my experience, desktop drivers are no more stable in LTS releases than in regular releases. I don't think regressions are common in new-user desktop experience, so I'd recommend the latest stable release (15.10). It's not so much "less stable", it's just that you'll have to upgrade sooner. Also, 14.04 is from before the switch to systemd, so you're more and more likely to run into trouble mixing and matching software from 14.04 with 3rd party packages, and with instructions on how to do things.
Dec
20
comment How to count the total number of files/folders on a system?
-not -type d would count all non-directory types of files. Or maybe you don't want to count symlinks.
Dec
20
revised How to count the total number of files/folders on a system?
added 729 characters in body
Dec
20
comment How to count the total number of files/folders on a system?
Yup, like muru says, you don't want to count all the "virtual" files in with files on "real" (disk-backed) filesystems.
Dec
20
answered How to count the total number of files/folders on a system?
Dec
12
comment Prevent/stop wpa_supplicant from starting
Seems to still be the case for Ubuntu 15.10, which uses systemd. wpa_supplicant is started from dbus, not from init scripts directly: systemctl status wpa_supplicant.service shows it's running, but not auto-started by systemd directly. (So disabling for future boots isn't possible with systemctl). Also, dpkg-divert will keep it disabled across package upgrades.
Dec
12
suggested rejected edit on Prevent/stop wpa_supplicant from starting
Nov
15
comment Why are there so many 32-bit dependencies for Skype?
@BartekChom: thanks for the correction, reposting an edited comment: Yes, the Skype releases are annoyingly 32bit binary only because they won't put the dev time into making a 64bit version. This isn't because of the Linux port being a 2nd-class citizen, it's because they don't even have a 64bit Windows version. Presumably their codebase isn't 64bit-clean, or they have some hand-tuned asm that they don't want to port to 64bit. Or maybe their data structures use a lot of pointers, so a 64bit version would be slower. Or maybe a 64bit version would be good, but they suck and won't make one.
Oct
20
suggested rejected edit on Why does Ubuntu have a disabled root account?
Oct
20
comment Why does Ubuntu have a disabled root account?
If someone pwns your account, they can capture the root password as you type it in, if you ever su from your account to root. Your point about privilege escalation only applies if you login as root on a separate console, and never do anything as root that trusts any files your normal account has write access to. As the existing answers say, on of the major reasons is to discourage newbies from thinking of root as an account you should log in to and use.
Sep
23
comment How to secure my laptop so that hacking by physical access is not possible?
@Relaxed: leaving out a single-user-mode boot option is pointless for most cases. Someone can always steal your laptop, take out the hard drive, and access it with whatever tools they want. If you want to defend against someone with access to the local keyboard/monitor, but that can't steal the hard drive, then set your bios to disallow booting from anything but hard drive, and configure grub without recovery options. A recovery-boot options is a useful part of a default install
Aug
15
comment Update a kernel git tree checkout of an old release to current release, instead of full download?
@DavidFoerster: Thanks, but I'm asking specifically about Ubuntu's kernel repositories, and what their history is like. I think I already know the general-case answer (it'll work if they share a common parent). Although I might be doing something wrong, since the remote side hanging up unexpectedly seems weird. Maybe my shallow-clone is to blame for confusing the server?
Aug
15
revised Update a kernel git tree checkout of an old release to current release, instead of full download?
just noticed my trusty repo was shallow
Aug
15
asked Update a kernel git tree checkout of an old release to current release, instead of full download?
Aug
1
answered VLC 2.2.1 doesn't play HEVC/H.265 encoded videos
Jul
28
answered Do I “need” DKMS?
Jul
27
comment Why doesn't apt-get autoremove remove my old kernels?
Update: aptitude has its own never-remove-old-kernels logic, and I don't know where that's configured. Things are configured so apt-get autoremove will remove all but the current and previous kernel packages, though, and that does work.