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How to use ffmpeg speedup video specific time range in one line ffmpeg cli

You have to use concat filter to merge them. ffmpeg -i "$input_file" -filter_complex "[0:v]trim=start=0:end=10,setpts=PTS/10[v1];[0:a]atrim=start=0:end=10,asetpts=PTS/10[a1];[0:v]trim=...
Gyan's user avatar
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Command to copy client public key to Windows OpenSSH SFTP/SSH server authorized keys file

Kindly warning (copy of new ssh-key over an existing one): If you are in the same situation like me and re-generate your ssh-key and for some reason ssh-copy-id-command does not work even with force, ...
Michael_123's user avatar
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Why does the kernel reject my self signed module on a secure boot system?

This is a partial answer because I'm still very unclear as to which EFI variables the Linux kernel loads into which keyrings. However, enrolling a key as the MOK is not the same as enrolling it into ...
u1686_grawity's user avatar
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Can't disable key in linux

You need to use xmodmap without sudo in order to set it for your current user's X session.
user9964388's user avatar
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Why is Postfix using a lookup table?

Postfix uses hash-tables to organize much of its data. The Postfix documentation describes it in the article The Postfix lookup table model: Postfix uses lookup tables to store and look up ...
harrymc's user avatar
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Why is Postfix using a lookup table?

is why a lookup table is being used. To implement its "alias" functionality. Disabling BDB is not the same as disabling all functionality that relies on lookup tables. All that you've ...
u1686_grawity's user avatar
-1 votes

Old Sata / Sas Controller on Ubuntu 22.04.2

Finding the expected PCI vendor and device ID for the SATA controller The question says the SATA controller card is an Iocrest si-pex40097. The product page 16 Port SATA PCI-e 2.0 x4 Card - SI-...
Chester Gillon's user avatar
1 vote
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du command with -h option modifies the displayed result

normally 384767 should be rounded to 385M If you divide by 1000, yes, but that's not what du is showing you. It's using the IEC (binary) units where 1 kB = 1024 bytes; 1 MB = 1024 kB; and so on. Some ...
u1686_grawity's user avatar
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How to call ifcconvert from the terminal

Download the zip from here. Then extract the binary file from the zip and place it is a directory, say .local/bin . Assure the directory is in PATH. In order to do that open .bashrc file from the home ...
alfasst's user avatar
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Compressed disk image on Linux

For file systems that support block compression, one option is to use store the disk image directly as a file. I know that BTRFS supports this, but likely others too. In the case of BTRFS, you will ...
crass's user avatar
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focus changes when changing workspaces in gnome 3

Necro-post; sorry ... but a decade later and this problem persists; it plagues me 'til I can't sleep. I finally (accidentally) found a solutions that works for me: the GNOME extension https://...
LiamF's user avatar
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Compressed disk image on Linux

As Matthias Krull suggests in the comment above, qcow2 can be a good format which supports compression to store a disk image in. It will be supported for quite a while as its the format for QEMU ...
crass's user avatar
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"Firefox is already running, but is not responding."

Worked for me, in Fedora (39): dnf install dbus-x11 ... I didn't have installed that package (dbus-x11, wich provides dbus-launch). And without any configuration or extra settings, I could launch &...
Sefer's user avatar
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Linux powersave governor not controlling CPU frequency as expected (many cores still at 3GHz)

This is a controversial bug-feature. The correct command to check the CPU frequency in this situation is cat /sys/devices/system/cpu/cpufreq/policy*/scaling_cur_freq This will show 800 MHz as ...
MRule's user avatar
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VirtualBox Won't Start (Failed to acquire the VirtualBox COM object)

In my case, I had foolishly compiled and installed a version of curl that was different from the package-managed installation. Running VirtualBox from the command line resulted in first seeing /usr/...
chb's user avatar
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2 votes
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An incorrect path is displayed in my custom command line prompt in bash

To achieve the dynamic update of your shell prompt to display the current and parent directory names in every new shell session without the need to change directories, you can use a small script in ...
Jason Floyd's user avatar
2 votes

An incorrect path is displayed in my custom command line prompt in bash

Unlike other situations, you have to use single quotes for the outer expansion and put it in the variable literally, as Bash will later do a second expansion every time the prompt is shown. With ...
u1686_grawity's user avatar
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No wireless networks shown in nmtui

Try rfkill command! sudo rfkill unblock all See: https://linuxconfig.org/how-to-manage-wifi-interfaces-with-rfkill-command-on-linux
Helio Brazil's user avatar
5 votes
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What is the purpose of these overlapping partitions?

What the hell is going on here? Is this how burned iso-images always look, or is Parabola doing something weird and special here? "Burned ISO images" do not change their appearance; the ...
u1686_grawity's user avatar
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Reposition objects in multiple SVG files

I don't know if this is a feature of SVG in general or of the format generated by Inkscape, but there are parameters "viewport", "height" and "width" that can be modified ...
Reverent Lapwing's user avatar
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What is the purpose of these overlapping partitions?

This is not completely an answer to the whole quenstion since I dont have the deep understanding, but at least some links for future readers who google this. It's not unique to Parabola, I saw the ...
Ilja's user avatar
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0 votes
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Command works only when user ran it, not with eval

The issue comes from export IFS=";". As it's a fix for Windows users, I made a check about if it's from linux or windows env. Here is the code (truncated) I made: case "$OSTYPE" in ...
Elikill58's user avatar
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Reset "at" command counter

You can check the current counter with: echo "ibase=16; $(cat /var/spool/cron/atjobs/.SEQ | tr '[:lower:]' '[:upper:]')" | bc To reset it, just change the hex value to zero and restart the ...
emandret's user avatar
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NetworkManager defined HotSpot, can't connect from Android phone

Did you try disable Protected Management Frames? After that, connecting to the AP on Android 11 started working for me: nmcli c modify $CON_NAME wifi-sec.pmf 1
Fialot's user avatar
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Linux: Simulate two servers via virtual network

As already explained in other posts (https://superuser.com/a/1745471, https://superuser.com/a/1781135), network interfaces do not act as mirrors, they act like pipes – and your problem is that packets ...
u1686_grawity's user avatar
1 vote

How to make windows .exe executables in Linux [No Duplicate- Extended Version]

You can use crossplatform systems like Java(whhich is already crossplatform), Qt (for C/C++) or Xamarin (or other C# crossplatform frameworks). Those can be compiled on both Linux/Windows for any of ...
lazba's user avatar
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4 votes
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How to make windows .exe executables in Linux [No Duplicate- Extended Version]

If you're writing in C or C++, you can use MingW64 to compile programs for Windows. (It's pretty much gcc, but supports MSVC syntax extensions and outputs an .exe file.) Several projects that people ...
u1686_grawity's user avatar
1 vote

Make WSL register GPU as the correct GPU and not a microsoft driver

What you wish to do will not work (>98%). WSL is a limited form of Virtual Machine and as such does not pass host hardware to the guest machine. That is quite normal. I did some reading on Hyper-V (...
John's user avatar
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How do I leave free space for grub when copying a whole system to a new media?

After doing some research, I understand that grub stores its early stages in free space before the first partition, but stage 2 should be a normal file. That's only true for BIOS-mode boot and only ...
u1686_grawity's user avatar
1 vote
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How do you set the default sound device at the shell prompt in pipewire?

you have to use pactl. pactl --help says: ... pactl [options] set-default-(sink|source) NAME ... and you can get the name examining the output of: pactl list sinks according to the arch-wiki it seems ...
scjorge's user avatar
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Less CPU utilization on APP Server with increase in user load on Linux

When you add tasks but the utilization of a resource doesn't increase, this means that this resource (or the computer) is saturated. In fact, adding more tasks to fight over the available resources ...
harrymc's user avatar
  • 478k
-1 votes

How to get D-Link DWA-182 Rev. D1 running under Linux

Only solution that worked for me: https://ubuntuforums.org/showthread.php?t=2472362 I used aircrack-ng
DiegoYungh's user avatar
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The last command output in linux for reboot is not giving the uptime instead it says still running twice

Ideally, this one should be a comment and not an answer. Since I do not have required reputation to comment, I've leaving an answer. You can refer to the following links to get an idea how last gets ...
Amartya Sinha's user avatar
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Equivalent of export command in Windows

If you would like to include this in programs, below is what is done in python: import os os.environ["OPENAI_LOG_FORMAT"] = 'stdout,log,csv,tensorboard' os.environ["OPENAI_LOGDIR"]...
Rajeswari K's user avatar
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On Linux I cannot bind to wireguard network interface via IP, but can with interface name

On Linux, binding via IP address does not actually change where packets are sent. They're still sent following your routing table, and it most likely still has a default route through somewhere else – ...
u1686_grawity's user avatar
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What is the difference between “/var/lib” and “/var/run?”

/var/run (or, more recently, /run) is for "system information data describing the system since it was booted". Such system information include PID files and named sockets. Examples: sshd ...
Stanley Yu's user avatar
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SSH / RDP Reverse Tunnel through intermediary

You're inventing a VPN. Set up a VPN server on one of your systems, then have both the managed host and the employees connect to it. If you're looking for free options, there's OpenVPN, WireGuard, ...
u1686_grawity's user avatar
1 vote

How to actually install newer video drivers on manjaro / arch?

The nvidia configuration just refers to package names. There is no need to update it as new versions of the driver are released. What then prompted the latest change to the nvidia configuration? The ...
Daniel B's user avatar
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How to output a bright Green check mark?

If you want it to have the "emoji style" appearance, output the variation selector 16 \uFE0F immediately after the checkmark. It will have whatever color is defined in the current font (...
u1686_grawity's user avatar
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How to output a bright Green check mark?

$ . /etc/os-release; echo $PRETTY_NAME Ubuntu 20.04.6 LTS $ tput setaf 10; echo -e "\u2714" ✔ $ tput setaf 10; printf "\u2714\n" ✔ ... are both bright green in my bash. (Not here at superuser ...
Hannu's user avatar
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I have a undeleteable Linux icon which leads to wsl.localhost on my windows 10 desktop

This post seems to address the same problem: Linux Icon on my Desktop that I can't remove (Not in File Explorer) : I have a Linux Icon on my Desktop that I can't remove, there is no delete option ...
harrymc's user avatar
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What is the terminal command other than ctrl + c to exit a running Node.js program in a macOS?

For MAC keyboards, the accurate shortcut on the terminal is Command + . (dot/period), equivalent to Ctrl + C or break. This shortcut interrupts processes. Refer to Terminal Help > Keyboard ...
Vivid spam's user avatar
-1 votes

What is the terminal command other than ctrl + c to exit a running Node.js program in a macOS?

If you are using VSCode: Ctrl+Z works just fine.
Jeffrey Voke O.'s user avatar
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sudo very slow after winbind to AD on RHEL6

Old issue but this looks very similar. I had such an issue and it turned out I had added a VPN interface (wireguard) to the interfaces list of my /etc/samba/smb.conf SAMBA configuration. Removing this ...
Alban Browaeys's user avatar
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How can I split from /dev/nvme0n1p3 to /dev/nvme0n1p2

but /dev/nvme0n1p3 is mounted at /home. So I can't unmount it and resize it Boot into another system where nvme0n1p3 does not have to be mounted – for example, an Ubuntu live CD/USB or a "...
u1686_grawity's user avatar
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How to get rid of "I have no name"?

Check if the user is able to read the "/etc/passwd" file. I have faced a similar issue before where my passwd file didn't had read access in the group & other's field. Try hitting the ...
shubham tamse's user avatar
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How to force GPG to use console-mode pinentry to prompt for passwords?

I use GPG on a remote machine via ssh as follows: When logging into the remote host from my laptop, I used ssh -Y to log in, which forwards all graphical program screens to be displayed on the server ...
Samveen's user avatar
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execute command after switch to different user with sudo

As has been written elsewhere, the sudo command allows a suitably authorised user to execute a command as someone else. By default, this someone else is root but (subject to authorisation) it can be ...
Chris Davies's user avatar
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0 votes

How to boot an HP XW8000 from a USB flash drive?

You can use PLOP Boot Manager to create a bootable CD and use it to chainload to your USB live/installation media. Important note #1: The HP XW8000 should run with acceptable performance any currently ...
ChanganAuto's user avatar
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1 vote

How to boot an HP XW8000 from a USB flash drive?

Given its age, this computer in unlikely to support USB Storage as a bootable device. The Technical Manual also makes no mention of USB being a bootable source. In the BIOS, find the BOOT MENU list, ...
BeardyMike's user avatar

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