Dominique's questions

On my Windows machine, proxy settings are basic:

Automatic Proxy setup:
  Automatically detect settings : checked

On my Windows machine, I've installed a Linux subsystem (Ubuntu). I'm trying to perform a sudo apt update or a sudo apt install .... Apparently, in order to get this done, I need to fill in /etc/apt/apt.conf (this file does not exist yet).

I've created that file and very naïvely, I've entered the following:

Linux Prompt> cat apt.conf
Acquire::http::proxy "http://<proxy>";
Acquire::https::proxy "https://<proxy>";
Acquire::ftp::proxy "ftp://<proxy>";
Acquire::socks::proxy "socks:<proxy>";

This, obviously, does not work, and I don't know about any basic proxies, used by my computer, so this leaves me with two possibilities:

• Either I search for a proxy, used by my computer, and I fill it in in /etc/apt/apt.conf file.
• Either I configure /etc/apt/apt.conf in order to detect proxy settings automatically, just like the "parent" Windows machine.

Which of the two options is best and how do I do it?

Thanks

Edit, some background

I wanted to do some sudo apt install (it's a consequence of this Superuser question, but as an example, let's take "emacs-gtk"):

Linux Prompt> sudo apt install emacs-gtk
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package emacs-gtk

When I do a sudo apt update:

Get:1 http://archive.ubuntu.com/ubuntu focal InRelease
Err:1 http://archive.ubuntu.com/ubuntu focal InRelease
  Clearsigned file isn't valid, got 'NOSPLIT' (does the network require authentication?)
Get:2 http://security.ubuntu.com/ubuntu focal-security InRelease
Err:2 http://security.ubuntu.com/ubuntu focal-security InRelease
  Clearsigned file isn't valid, got 'NOSPLIT' (does the network require authentication?)
Get:3 http://archive.ubuntu.com/ubuntu focal-updates InRelease
Err:3 http://archive.ubuntu.com/ubuntu focal-updates InRelease
  Clearsigned file isn't valid, got 'NOSPLIT' (does the network require authentication?)
Get:4 http://archive.ubuntu.com/ubuntu focal-backports InRelease
Err:4 http://archive.ubuntu.com/ubuntu focal-backports InRelease
  Clearsigned file isn't valid, got 'NOSPLIT' (does the network require authentication?)
Reading package lists... Done
N: See apt-secure(8) manpage for repository creation and user configuration details.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
E: The repository 'http://archive.ubuntu.com/ubuntu focal InRelease' is not signed.
E: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/focal/InRelease  Clearsigned file isn't valid, got 'NOSPLIT' (does the network require authentication?)
N: See apt-secure(8) manpage for repository creation and user configuration details.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
E: The repository 'http://security.ubuntu.com/ubuntu focal-security InRelease' is not signed.
E: Failed to fetch http://security.ubuntu.com/ubuntu/dists/focal-security/InRelease  Clearsigned file isn't valid, got 'NOSPLIT' (does the network require authentication?)
E: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/focal-updates/InRelease  Clearsigned file isn't valid, got 'NOSPLIT' (does the network require authentication?)
E: The repository 'http://archive.ubuntu.com/ubuntu focal-updates InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/focal-backports/InRelease  Clearsigned file isn't valid, got 'NOSPLIT' (does the network require authentication?)
E: The repository 'http://archive.ubuntu.com/ubuntu focal-backports InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.

As requested: I pinged "8.8.8.8", and there everything seems to be fine:

Linux Prompt> ping 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
64 bytes from 8.8.8.8: icmp_seq=1 ttl=116 time=9.47 ms
64 bytes from 8.8.8.8: icmp_seq=2 ttl=116 time=9.84 ms
...
^C
--- 8.8.8.8 ping statistics ---
6 packets transmitted, 6 received, 0% packet loss, time 5007ms
rtt min/avg/max/mdev = 9.164/9.388/9.838/0.226 ms

I thought that the apt install problems were due to the /etc/apt/apt.conf file (containing the proxy settings), hence my question.

In this question, I already asked a first question on the Ubuntu app on a Windows machine, this was about a Ubuntu app I installed on my computer at work.

Now I've tried to do the same with WSL on my computer at home, but it seems not to work.

First some general information:

First line of help result:

GNU bash, version 4.4.19(1)-release (x86_64-pc-linux-gnu)

uname -a result:

Linux DESKTOP-D0GIHSU 4.4.0-17763-Microsoft #864-Microsoft Thu Nov 07 15:22:00 PST 2019 x86_64 x86_64 x86_64 GNU/Linux

I've again used Windows mklink C C:\ command for creating a Windows symlink in the root directory of my Ubuntu app, but this time it seems not to work:

Windows dir command result excerpt:

19/12/2019  14:35    <SYMLINKD>     C [C:\]

(I followed the link and while doing a dir, the results of dir C:\ are shown, so it works)

Ubuntu app ls -ltra | grep C result:

ls: cannot access 'C': Input/output error
d?????????  ? ?    ?         ?            ? C

Anybody has an idea what's going wrong?
Thanks in advance

On my Windows-10 machine, I have a Ubuntu app, which I use for handling files on my local PC. In order to do this, I have two mounting points (one for every harddisk, as you can see):

Ubuntu Prompt>mount
...
C: on /mnt/c type drvfs (rw,noatime,uid=1000,gid=1000)
E: on /mnt/e type drvfs (rw,noatime,uid=1000,gid=1000)

On my Windows-10 PC, I also have a network drive, as you can see in following WMIC result:

Windows Prompt>>wmic logicaldisk get Caption, Description
Caption  Description
C:       Local Fixed Disk
...
E:       Local Fixed Disk
H:       Network Connection
...

I am capable of mounting the H:-drive as a mounting point (which makes it easily accessible from my Ubuntu app), as you can see:

Ubuntu Prompt> sudo mount H: /mnt/h -t drvfs
Ubuntu Prompt> mount
...
C: on /mnt/c type drvfs (rw,noatime,uid=1000,gid=1000)
E: on /mnt/e type drvfs (rw,noatime,uid=1000,gid=1000)
H: on /mnt/h type drvfs (rw,relatime)

However, when I close the Ubuntu app and re-open it, the H:-drive related mounting point has disappeared:

Ubuntu Prompt> mount
...
C: on /mnt/c type drvfs (rw,noatime,uid=1000,gid=1000)
E: on /mnt/e type drvfs (rw,noatime,uid=1000,gid=1000)

// No H:-drive mounting point anymore!

Is there a way I can make this mounting point persistent?
Thanks in advance

Edit after first reply

The Ubuntu app I'm using has following specifications (Windows start button, Apps and Features (System settings)):

Publisher   : Canonical Group Limited
Version     : 1804.2018.817.0
App         : 0 bytes
Data        : 0 bytes
Total usage : 0 bytes

As far as fstab is concerned, this is the result of the find / -name "fstab" 2>/dev/null command:

/etc/fstab
/mnt/c/cygwin/etc/fstab
/mnt/c/cygwin64/etc/fstab
/mnt/c/MinGW/msys/1.0/etc/fstab
/mnt/c/Program Files/Git/etc/fstab
/mnt/c/Program Files (x86)/Microsoft Visual  Studio/2017/Professional/Common7/IDE/CommonExtensions/Microsoft/TeamFoundation/Team Explorer/Git/etc/fstab
/mnt/c/Users/DominiqueDS/AppData/Local/GitHubDesktop/app-1.1.1/resources/app/git/etc/fstab
/usr/share/doc/mount/examples/fstab
/usr/share/doc/util-linux/examples/fstab

I believe the one I need is the first one, but this one currently has following content:

Ubuntu prompt> cat fstab
LABEL=cloudimg-rootfs   /        ext4   defaults        0 0

This format is so different of the format within the first reply that I'm reluctant to use it (imagine I can't start up my Ubuntu app anymore, due to corrupted mounting points).

Can you confirm me that this is the right fstab indeed and that the mentioned format is correct?

I have a Ubuntu app, installed on my Windows-10 machine. As far as versions are concerned, this is the result of uname -a:

Linux <username> 4.4.0-17134-Microsoft #523-Microsoft Mon Dec 31 17:49:00 PST 2018 x86_64 x86_64 x86_64 GNU/Linux

Using this Linux "emulator", as I call it, I regularly do grep, find, wc -l, sort, ..., for analysis purposes, but this sometimes generates output files in UNIX format (I'm talking about line endings).

In order to get Windows line endings, I decided to launch a unix2dos on the file, but this gave following error message:

The program 'unix2dos' is currently not installed. You can install it by typing:
sudo apt install dos2unix

In other words, my app knows that, in order to do unix2dos, the package dos2unix is needed. This looks like good news, except for the fact that I'm not able to install it:

sudo apt install dos2unix
[sudo] password for <username>:
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package dos2unix

I have already installed packages before, so it should be a problem specific for the dos2unix package.

For your information:

• I don't have a /var/log/messages file.
• dmesg doesn't work: dmesg: read kernel buffer failed: Function not implemented
• I have a /var/log directory, but the latest file/directory modification is around a week ago.
• I have a /var/log/apt directory, but the latest file/directory modification is around a week ago.
• I tried debugging this myself, using strace, but this failed (strace: exec: Operation not permitted, +++ exited with 1 +++).

Edited after first comment

apt-cache policy
Package files:
 100 /var/lib/dpkg/status
     release a=now
 500 http://security.ubuntu.com/ubuntu xenial-security/restricted amd64 Packages
     release v=16.04,o=Ubuntu,a=xenial-security,n=xenial,l=Ubuntu,c=restricted,b=amd64
     origin security.ubuntu.com
 500 http://security.ubuntu.com/ubuntu xenial-security/main amd64 Packages
     release v=16.04,o=Ubuntu,a=xenial-security,n=xenial,l=Ubuntu,c=main,b=amd64
     origin security.ubuntu.com
 500 http://archive.ubuntu.com/ubuntu xenial-updates/restricted amd64 Packages
     release v=16.04,o=Ubuntu,a=xenial-updates,n=xenial,l=Ubuntu,c=restricted,b=amd64
     origin archive.ubuntu.com
 500 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages
     release v=16.04,o=Ubuntu,a=xenial-updates,n=xenial,l=Ubuntu,c=main,b=amd64
     origin archive.ubuntu.com
 500 http://archive.ubuntu.com/ubuntu xenial/restricted amd64 Packages
     release v=16.04,o=Ubuntu,a=xenial,n=xenial,l=Ubuntu,c=restricted,b=amd64
     origin archive.ubuntu.com
 500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages
     release v=16.04,o=Ubuntu,a=xenial,n=xenial,l=Ubuntu,c=main,b=amd64
     origin archive.ubuntu.com
Pinned packages:

Does anybody have an idea?

I'm working on a Ubuntu Windows app on my Windows-10 PC, the result of uname -a is the following:

Linux DOMINIQUEDS 4.4.0-17134-Microsoft #48-Microsoft Fri Apr 27 18:06:00 PST 2018 x86_64 x86_64 x86_64 GNU/Linux

I'm doing some C++ development, and I'd like to know which source files (*.cpp or *.h) are including the file Sample.h, so I launched following command:

find ./ -name "*.cpp" -or -name "*.h" -exec grep -i "include" {} /dev/null \; | grep "Sample.h"

This seems not to be working: only the *.h files, containing include and Sample.h on the same line, are given.

However I know for sure that the -o construction for finding different kinds of files is correct:

find ./ -name "*.cpp" -or -name "*.h"

=> here I get a list of *.cpp and *.h files.

This leaves me with two possibilities:

• Either the behaviour is correct: the -exec parameter is only used on the last find result. In that case, can somebody tell me how I can perform the -exec on all find results?
• Either the behaviour is wrong. In that case, does somebody know if this is a general Ubuntu problem/Windows-10 Ubuntu app problem/... and if any solution can be expected and when?

Thanks in advance

On my Windows 10 machine, I've installed a Ubuntu system (as a Trusted Microsoft Store app). When I open that window and type help, these are the first lines I see:

GNU bash, version 4.3.48(1)-release (x86_64-pc-linux-gnu)

The results of uname -a are the following:

Linux DOMINIQUEDS 4.4.0-43-Microsoft #1-Microsoft Wed Dec 31 14:42:53 PST 2014 x86_64 x86_64 x86_64 GNU/Linux

In that Ubuntu window, I have lots of interesting Linux/UNIX features, like find, grep, ..., but now I would like to do some process handling (ps -ef, kill -9), and this seems not to work:

When opening Windows task manager, I see ±100 processes running.

When I run ps -ef, (even after having opened the Ubuntu window as administrator), I only see three processes:

DominiqueDS@DOMINIQUEDS:~$ ps -ef
UID        PID  PPID  C STIME TTY          TIME CMD
root         1     0  0 17:14 ?        00:00:00 /init
Dominiq+     2     1  0 17:14 tty1     00:00:00 -bash
Dominiq+    18     2  0 17:19 tty1     00:00:00 ps -ef

Does anybody know how I can make ps -ef and kill -9 work in this Ubuntu window on my Windows-10 machine?

Thanks in advance