All Questions
238,691
questions
3
votes
5
answers
236
views
How to let sed un-comment one of multiple paragraphs separated by newlines?
Clarification: Using GNU sed.
Status quo - ~/.screenrc, last lines:
# name synthpop
# screen -t script emacs -nw /home/$USER/bin/synthpop
# name thrashmetal
# screen -t script emacs -nw /home/$USER/...
- 185
0
votes
0
answers
16
views
local proxy port forward error with SSH: SSS_SSH_knownhostsProxy: connection refused
I am using redhat enterprise edition 8.9 where I am trying to connect to remote server via local proxy method:
When I run the command in the shell:
ssh 127.0.0.1 -p 35856
I get the below error:
...
0
votes
0
answers
17
views
Prevent OOM killer inside guest in LXC
I have a python program myprogram.py. I realized that my python program is being killed due to Out Of Memory (OOM). But, I noticed also that my VPS is inside LXC and has swap 1GB, when the memory full ...
0
votes
0
answers
19
views
How can I resize my Fedora Btrfs root partition to take up Windows space with my boot partition in the way?
I have a UEFI system on a laptop that's currently dual-booting Windows and Fedora 39 (KDE Plasma). I don't use Windows much, and need extra space on my Fedora partition. So, I need to shrink nvme0n1p3 ...
0
votes
0
answers
19
views
Entering distrobox changes the display resolution
In a Fedora 39 kinoite VM, I have a Distrobox container with Ubuntu22.04. When I first created the container the display had a resolution of 1280x800.
I changed the display resolution to 1280x1024 and,...
- 3
-1
votes
1
answer
31
views
Portable logging from Python?
I am writing a small plugin for Postfix using python and want to it to emit logging messages. I am not particularly familiar with python and was advised to use loguru. This was certainly easy when I ...
- 5,557
0
votes
1
answer
135
views
Convert swf files to mp4
I came accross this nice web. There are swf and mp3 files.
I'd like to convert them to mp4 or something, so it is viewable.
I tried gnash and ffmpeg without success.
I'm on Lubuntu 22.04
- 15.4k
0
votes
0
answers
39
views
Unable to copy using wl-copy (wl-clipboard) - issue with `xdg-mime`
OS: Arch linux (linux-6.8.1.arch1-1)
WM: Hyprland
When I run echo 'hello' | wl-copy, I get the following output:
echo "hello" | wl-copy
Usage: file [-bcCdEhikLlNnprsSvzZ0] [--apple] [--...
0
votes
1
answer
27
views
Trying to understand iptables log messages
I have set up iptables to log outgoing traffic from all but a limited set of users, and I'm trying to understand the log messages that this produces. Looking at /var/log/syslog, I see requests from ...
- 123
1
vote
1
answer
24
views
How do I automatically set the target context for a .sock file to be **httpd_var_run_t** so that nginx can connect to and write to the socket?
The original file context for /run/unicorn.sock is tcontext=system_u:object_r:var_run_t:s0
How do I have the file context automatically be system_u:object_r:httpd_var_run_t:s0 when I start the socket ...
- 97
1
vote
1
answer
32
views
ssh is picking up other keys [closed]
ssh utility is adding keys and doing stuff with known_hosts, and I get this error:
ubuntu@${addr}: Permission denied (publickey).
I have this code:
#!/usr/bin/env bash
ssh-add -D
ssh -vvv -i 'my.pem'...
- 10k
0
votes
1
answer
18
views
In gnome files: how do I remove credentials I told it save permanently to connect to a share under the smb protocol
If I have incorrect credentials saved, should it prompt me for a username and password? I'm getting "Connection Refused" and I'm assuming it's the bad credentials I know I put in there.
os ...
- 101
0
votes
0
answers
16
views
Modsecurity port issue
background: For my uni project I would like to locally host 3 virtual machines (1 attacker and 2 different WAF) to simulate the effectiveness of certain web application firewalls under malicious ...
1
vote
0
answers
30
views
How to make a virtual tty (tty0tty) look like a real serial port?
I'm using tty0tty. The virtual serial ports appear as /dev/tntX where X is an integer between 0 and 7. Problem is, many apps require "real" serial ports, such as lightburn. So /dev/tntX ...
- 192
4
votes
1
answer
360
views
Can I use SELinux to add an extra layer of protection against 0-day VM escape exploits in KVM/QEMU?
My host is Fedora, and I want to add an extra layer of protection against 0day KVM/QEMU exploits that execute code on the host. For example there have been CVEs where if we run a specially crafted ...
- 167
-1
votes
1
answer
21
views
How to stop xfce from full-screening a window when dragging the title bar and it hits the top of the screen?
When I am trying to position a window against the top of the screen, as the mouse get within a few pixels of the top , the window flips to full screen size, which is totally annoying. The<same on ...
- 121
2
votes
1
answer
88
views
How to pass a parameter to a command that's being executed by exec in bash?
I'm trying to start a subprocess with a unique process name from a bash script. This works:
bash -c "exec -a MyUniqueProcessName './start_service' &"
but my problem is that I want to ...
- 123
0
votes
0
answers
21
views
how to change gtk default font in xfce4?
I'm not sure if this is Debian 12 issue or an xfce4 (4.18) issue or a GTK (3.24) issue: various applications let you choose fonts for this or that, but, particularly in pop up dialogue boxes, there ...
- 2,349
1
vote
1
answer
19
views
Rendering video with Blender on Pop!_os
I have been using blender as a video editor for a few years now, but it has always rendered very slowly. I worry that I've installed a few too many drivers and something has gotten mixed up at some ...
- 13
0
votes
0
answers
43
views
How does the auto format of the join command work?
Here is an example:
$ cat file1
hello
there
$ cat file2
some,very,long,line,hello,csv
some,very,long,line,nope,csv
$ join -t, -1 1 -2 5 file1 file2
hello,some,very,long,line,csv
This works as ...
- 101
-1
votes
5
answers
71
views
multiline grep search into separate files per occurence
I have a file as following:
example.txt
-1
15
1 0 0 11 -1.0000E+001 1.0000E+001 -1.0000E+001
2 0 0 11 1.0000E+001 1.0000E+001 ...
- 101
0
votes
0
answers
11
views
Issues with Pulseaudio - combined output hdmi + analog
For a kiosk installation (Xubuntu) I need to have sound to output at the same time through HDMI and headphone jack on Dell Optiplex 7040 micro. The computer has an onboard card with analogue and ...
2
votes
1
answer
232
views
Don't truncate the COMMAND column in ps
I want to list process by their executable name, using the comm column. But it always gets truncated even when it's the last column:
$ ps -C systemd-tty-ask-password-agent -o %cpu,%mem,comm
%CPU %MEM ...
-3
votes
1
answer
48
views
what is storage virtualization in contrast to? [closed]
i'm reading up on storage virtualization
https://en.wikipedia.org/wiki/Storage_virtualization
and i'm trying to understand what this is in contrast to, or a solution to, or why it exists at all?
some ...
- 51
-1
votes
3
answers
67
views
cron "@reboot" schedule not executing network configuration script
Version: Ubuntu 20.04.6 LTS
In my crontab I have the following:
@reboot /home/<user>/startup.sh
Other output:
<user>@eveng-gcp-v3:~$ ls -la | grep start
-rwxr-xr-x 1 root root ...
- 1
0
votes
1
answer
21
views
create dictionary of the play_hosts and their eth0 IP address in ansible
How would I create a list of all hosts in the play and their eth0 IP address?
I would like a list like this:
host2ip:
- host1: 10.0.0.1
- host2: 10.0.0.2
- host3: 10.0.0.3
0
votes
2
answers
41
views
Check server's free and reserved CPU
I want to check the free and reserved CPU in a linux server.
I found this command mpstat and below is the output:
CPU %usr %nice %sys %iowait %irq %soft %steal %guest %gnice %idle
...
- 103
0
votes
0
answers
35
views
Pressing the power key does not trigger a shutdown
Pressing the power key does not trigger a shutdown.
I do see "Power key pressed" in journalctl, but nothing more.
$ sudo journalctl --unit systemd-logind --boot
-- Logs begin at Fri 2020-02-...
0
votes
0
answers
40
views
UFW does not block any ports (Ubuntu 22.04)
On my fresh Hetzner Cloud server, the ufw seems to be ineffective. The status output is the following:
Status: active
To Action From
-- ------ ...
- 11
0
votes
0
answers
7
views
xkb utf8 symbols but no syms
Fedora 39 here, but this should apply in general for any linux.
My ~/.xkb/symbols/my has this (part):
replace key <FK01> {
[ F1, F1, {H,e,l,l,o}, {W,o,r,l,d}, XF86_Switch_VT_1 ]
};
...
0
votes
1
answer
63
views
Command Logging in Linux
I am seeking guidance on how to set up logging for executed Linux commands into a designated log file with specific details. My objective is to create a mechanism, possibly a daemon or background ...
- 9
0
votes
0
answers
46
views
Unexpected password authentication problem
I have been using a properly configured system with no authentication changes for over a month now. And suddenly I get this error message:
Sorry, password authentication didn't work. Please try again.
...
1
vote
0
answers
76
views
Bluetooth Manager in Linux Mint not working
I have a problem with bluetooth on my Linux device:
I did some troubleshooting and reinstalled bluetooth and blueman.
I then did the following:
/etc/init.d/bluetooth start
/etc/init.d/bluetooth ...
- 15
0
votes
0
answers
31
views
nftables rules apparently blocking ssh traffic - could it be special characters?
I have a set of nftable rules of the following form:
chain INPUT {
type filter hook input priority filter; policy drop;
ip saddr 11.37.79.97/29 counter packets 0 bytes 0 log prefix ...
- 101
0
votes
1
answer
41
views
How to run `docker exec` with ssh command
Not a fun one -
#!/usr/bin/env bash
ssh -i 'my.pem' "ubuntu@${addr}" "docker exec -ti '$name' bash"
I get this lame error:
the input device is not a TTY
with no context at all. ...
- 10k
0
votes
1
answer
45
views
Detecting if monitor is on/off
I want to detect if my monitor is on/off. This is because I need to record my screen time as an assignment. Numerous google searches haven't helped, as they return answers saying that it's not ...
0
votes
1
answer
41
views
Magic Trackpad tap-to-click Debian 12 Xfce, how to enable
Xfce Version 4.18
GTK Version 3.24.38
Kernel Version 6.1.0-18-amd64
First SE question. I tried to comment here instead but do not have sufficient reputation.
How do I enable tap-to-click for a Magic ...
1
vote
1
answer
52
views
One user cannot run startx anymore
As root, I changed one user’s home directory to a soft link to another drive (while the user was not logged in). Then this user could not run startx anymore, though other users with the same .xinitrc ...
0
votes
1
answer
31
views
Passing ETag as Bash Variable to cURL
I'm struggling passing my etag to cURL and getting a successful response. I get the etag with:
etag=$(
curl \
-SIXGET \
-u $token \
-H "Accept: application/json" \
"$api_url/...
- 3
0
votes
0
answers
19
views
elasticsearch cannot read certificate file - linux file permissions
I generated a certificate file with certbot. It is placed in /etc/letsencrypt/....
I created a group called elk where I added the elasticsearch user, and I recursively set it as the owning group for /...
- 203
1
vote
3
answers
65
views
How to tail continuously a log file that is being deleted and recreated?
I need to extract information from a log file that is deleted and recreated every time a program runs. After detecting that the file exists (again), I would like to tail it for a certain regexp.
The ...
- 163
0
votes
2
answers
17
views
systemd service terminates with error because the script (expectedly) returned
Searched extensively, many questions related but none that I found actually worked.
So I have a shell script which I want to automate via a systemd service. The script:
#!/usr/bin/env bash
SESSION=&...
1
vote
1
answer
46
views
Why is keyboard and mouse unable to be hotplugged in FreeBSD jail?
I have an entire system with xorg-x11 running in a jail. My only issue is that I am unable to add or remove a keyboard or mouse while X is running. If I restart X, the newly connected keyboard or ...
- 23
1
vote
0
answers
23
views
Gnome Top bar and window switcher on all monitors?
In Gnome (v45+), is there a way to have the top bar (and the window/app switcher overlay) mirrored on all monitors?
- 157
4
votes
2
answers
556
views
Displaying "current" key in jq
I have a dictionary keyed on usernames, like:
"userinfo": { "alice": { "key1": 1, "key2": 2}, "bob": { "key1": 11, "key2": 22}, ......
1
vote
0
answers
21
views
Hadoop + warnings as slow block-receive from data-node machines
We have Hadoop cluster with 487 data-nodes machines ( each data-node machine include also the Service node-manager ) , all machines are physical machines ( DELL ) , and OS is RHEL 7.9 version.
Each ...
- 13.2k
0
votes
0
answers
17
views
External usb SSD Restic/Backrest backup automation
I've a zimaboard micro server with proxmox and a debian 10 CT that is delegate for backup system (Restic/Backrest) with an external usb ssd always attached.
It is possible to pilote the external usb ...
- 27
1
vote
0
answers
24
views
Yocto Implementation of QEMU
What exactly is the difference between the Yocto Implementation of QEMU and QEMU in general?
It is clearly stated right at the beginning of the relevant chapter in the Yocto documentation that they ...
1
vote
0
answers
23
views
NetBSD - how to display information about kernel memory in GDB?
I'm debugging the NetBSD kernel with gdb, but I would like to be able to display information about the memory region an address is in. I'm mainly interested in finding out the permissions of a page of ...
- 111
1
vote
0
answers
36
views
btrfs size issue
According to my calculations, my btrfs should have a total size of 153 GB by totalling the Exclusive component from btrfs qgroup show, but it actually shows up as around 700 GB using other disk usage ...
- 331