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Does Windows have something like journald on Linux?

Slow boots can arise from multiple sources. Dying hard disks Fragmented file systems. Extra steps in the bootup process, eg more executables being loaded and initializing, and some possibly hanging. ...
MysteriousMadCoder's user avatar
0 votes

Setting up Linux Samba server (general problems): No permission

"The hosts allow or allow hosts parameter is one of the key advantages of Samba. It allows access control of shares on the ip-address level. To allow only specific hosts to access a share, list ...
MysteriousMadCoder's user avatar
0 votes

create symbolic link in directory with no write permission

You have to access the directory with elevated permissions, or from a user or group that has write access to the directory, such as the owner or the owners group. Even if you own the file in a ...
MysteriousMadCoder's user avatar
0 votes

Sink file like /dev/null

I would have said tmp, since the files there are supposed to be purged, after 30 days. Perhaps you can update the time for which tmp stores files in the settings somewhere, but if the application is ...
MysteriousMadCoder's user avatar
3 votes

How routers deal with only one external IP?

From googling I understand that all routers do is performing NAT NAT is still an "add-on" feature on top of actual routing. When a reply comes in, after NAT it still follows the regular ...
user1686's user avatar
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0 votes
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create symbolic link in directory with no write permission

Modifying the file is a file permission action. Deleting the file is a directory permission action. Replacing a file is deleting a file and writing a new file, and both these actions are directory ...
music2myear's user avatar
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1 vote

How routers deal with only one external IP?

They keep track of the ports at each live device level. The external ip is on the network of the wan, so connections to it are going to be handled by the router over a specific local and remote port ...
MysteriousMadCoder's user avatar
3 votes

How routers deal with only one external IP?

The following is a very basic explanation. Your devices uses private addresses. Private addresses are subnets/networks with the following IP addresses (see RFC 1918): 10.0.0.0 to 10.255.255.255 172....
Reddy Lutonadio's user avatar
2 votes
Accepted

Sink file like /dev/null

The post How can I create a /dev/null-like "blackhole" directory? suggests this : This isn't supported out-of-the-box on any unix I know, but you can do pretty much anything with FUSE. ...
harrymc's user avatar
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0 votes

/dev/null missing, how can I replace it?

Reboot your system - this will wipe /dev.
jp_'s user avatar
  • 25
1 vote
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iptables drop all packets that do not come from two specific subnets

drop all packets that do not come with a source IP in the subnets 11.2.4.0/24 and 11.2.3.0/24 To avoid any misinterpretation: drop all packets that do not come with a source IP in the subnets (11.2.4....
A.B's user avatar
  • 5,048
1 vote

tmux %if %else %endif syntax misbehaving when using a String Comparison statement on a format variable invoked on .tmux.conf

< and > within tmux perform a string comparison (sorting), character by character. The string 2 is indeed "greater" than 10 because the first character 2 > 1 (the rest of the string ...
user1686's user avatar
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0 votes

Unprocessed orphan inode list in VirtualBox VM

I was facing the same issue on an AWS EC2 machine. To complicate the resolution, the volume that was affected was the root volume of the EC2 instance. Hence the device was failing to boot and SSH was ...
Vishwas M.R's user avatar
3 votes
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Allowing world access to a Raspberry PI behind a home router

The Pi creates an SSH tunnel/VPN with a server on the internet. I then connect to that server to to connect to the Pi. Are there people who offer such a service? There are hundreds of companies that ...
user1686's user avatar
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0 votes

How can I view results of my cron jobs?

Just run journalctl -u cron.service (and then hit SHIFT + G to go to the bottom of the page if you need). While it is usually better to redirect the output of your cron script somewhere intentional, ...
Berel Levy's user avatar
0 votes

Fit 2 A5 pdf into ONE PAGE A4 Landscape

I joint a link to my code and 16 pdf A5 files to work with it: http://panificiochicco.it/chifelio/gsrif/filespip.php Make +x forpdf16.sh in the same dir of *.pdf files
Claudio Chicco's user avatar
0 votes

Why does `rsync` show directories even if it does not make any transfer

You need to include the --prune-empty-dirs flag (-m). This option tells the receiving rsync to get rid of empty directories from the file-list, including nested directories that have no non-...
roaima's user avatar
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0 votes

How to copy Files from One folder to another using third folder as a reference ? (Ubuntu/Linux/rsync)

This command will implement your requirement assuming that the specified directories 1, 2, 3 are in the current directory ($PWD). This isn't necessary for the source and destination, but the ...
roaima's user avatar
  • 2,804
0 votes

Where is vmlinux on my Ubuntu installation?

vmlinux file is part of what's called Debug Symbol Packages. Here's a good reference: https://wiki.ubuntu.com/Debug%20Symbol%20Packages First run this: echo "deb http://ddebs.ubuntu.com $(...
七海娜娜米's user avatar
0 votes

Assign IP and a testing Domain to a VirtualBox

This article helped me to forward ip address to access my linux debian virtualbox machine through my hosts browser. And also to assign a test domain to that ip address on host machine edit Linux: /...
zakadmin's user avatar
0 votes

Fit 2 A5 pdf into ONE PAGE A4 Landscape

From alls your reponse I understand that I had no correctly expose my initial question: I know how create mysingle.pdf, A5 formatted with "wkhtmltopdf" command. I know how to separate ...
Claudio Chicco's user avatar
2 votes

What happens (how to control what happens) to the unused part (unused tail) of a block when writing a small file to a larger block?

Filesystem blocks (or clusters, you name it) are "backed" by logical blocks of a storage drive. With at least command sets used in modern storage interfaces (ATA/SCSI/NVMe/...), there is no ...
Tom Yan's user avatar
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2 votes
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What happens (how to control what happens) to the unused part (unused tail) of a block when writing a small file to a larger block?

When a process performs a buffered write, the bytes are copied into the page cache, and then eventually the dirty page will be written to disk. This can happen for a number of reasons; the program ...
Theodore Ts'o's user avatar
0 votes

Fit 2 A5 pdf into ONE PAGE A4 Landscape

Supposing you can create with wkhtmltopdf a normal A4 file, the following pdfjam[1,2,3] command should work as per your wishes pdfjam --landscape --signature 16 main.pdf Note that signature has to ...
Hastur's user avatar
  • 18.6k
0 votes

How to reliably attach to session DBUS over ssh?

More practical way is to use ssh with X forwarding. And it works for me just fine. ssh -X alt-user@localhost Of cause, one has to setup ssh properly for this to work. But it is described very well on ...
Dmytro's user avatar
  • 101
1 vote

Linux--What program is responsible for the "Battery Low" notification, when I have plenty of battery left?

It's a bug in the power manager due to battery status 'flapping', see this: power manager notifications repeating incessantly ... power problems? I'm still looking for a nice solution to this...
Yan King Yin's user avatar
0 votes

Grub doesn't show OS selection menu when booting a dual boot setup

This could be caused by grub not detecting other installed partitions. To fix this open the grub file sudo gedit /etc/default/grub Then enable the os-probe by adding the following line in the grub ...
Ndaruga's user avatar
1 vote
Accepted

Linux UDP server always show 127.0.0.1 as source IP

The netcat tool (all of its variants, including nmap's netcat) has no feature to handle this for UDP. Due to how the BSD socket API is implemented, contrary to TCP, by default UDP doesn't keep state ...
A.B's user avatar
  • 5,048
0 votes

Is it possible to get `ps` to render thread names in wide mode?

You can't. Thread names are limited to 16 bytes in Linux kernel. Which is 15 characters and the C-string \0 (null) terminating char. Which can also be seen in your example of OkHttp TaskRunn ...
Destroy666's user avatar
  • 2,925
0 votes

ssh multi-hop... adapting command to ssh config file

To ssh into server B from server A with the same username Host target HostName <serverB_hostname> ForwardX11Trusted yes LogLevel verbose User <username> ProxyCommand ssh <...
Basavaraj Hiremath's user avatar
1 vote

What happens (how to control what happens) to the unused part (unused tail) of a block when writing a small file to a larger block?

A long time ago, de-allocated sectors with sensitive data on a HDD could be read by writing a small file to the disk on top of the existing data, then reading in the entire sector, as it is allocated ...
harrymc's user avatar
  • 446k
2 votes

What happens (how to control what happens) to the unused part (unused tail) of a block when writing a small file to a larger block?

I can not comment on EXT4 specifically but, Observation on NTFS formatted drives: Assume 4KB clusters and cluster only partially used, the 'tail' contains zeros. Here we see the last two bytes of a ...
Joep van Steen's user avatar
0 votes

Make Windows Detect a Hard Drive in a Similar Way as Linux Does

The main issue with Windows is that it will try to mount everything it recognizes. So basically any volume formatted with a file system it can work with. This results in two problems: Windows will '...
Joep van Steen's user avatar
0 votes
Accepted

Outgoing UDP packets don't reach the host from VM after certain time

Setting pivpnPERSISTENTKEEPALIVE=25 in /etc/pivpn/wireguard/setupVars.conf and creating the client configs again like described here seems to solve the problem.
ceoonum's user avatar
  • 11
0 votes

QEMU (with virtmanager) boots to uefi shell when trying to install windows 11

In my case, I believe I had let the "Press any key to boot from.." screen timeout. I reboot the VM, and pressed a key when prompted, and it worked fine. This is corroborated by FAQ someone ...
Mattwmaster58's user avatar
-2 votes

Kali Linux live USB with WiFi adapter support?

To get your Kali Linux OS to recognize and use the Netgear USB Wi-Fi adapter, you can follow these steps: Plug in the Netgear USB Wi-Fi adapter into your laptop's USB port. Open a terminal window in ...
Garrett Brown's user avatar
0 votes

opendkim still not working - opendkim-genkey: openssl exited with status %d

I ended up purging openssl and reinstalling sudo apt-get openssl. I had to reinstall postfix and dovecot (and maybe will need to with others too) but in the end it seems to be working now.
STEVE J's user avatar
1 vote

How can I HTTP stream a USB webcam plugged into my headless Ubuntu Server remotely?

Using https://motion-project.github.io, I could create a config file with 2 lines, and do a standard reverse proxy using NGINX. Here is my motion.conf file: stream_quality 98 stream_maxrate 5 ...
scrollout's user avatar
  • 111
0 votes

Is there an image viewer that takes images on STDIN?

With imv, e.g. on Debian bullseye: sudo apt install imv # it provides commands imv-x11 and imv-wayland # e.g. with imv-x11, pipe to imv-x11, and make sure to end the command with a dash: e.g. ...
Abdull's user avatar
  • 2,046
1 vote

Grant user access to create snapshots in btrfs

There does not appear to be any reasonable way to bypass this check. I have located the permission check in the source code. It defers to the inode_owner_or_capable. if (!inode_owner_or_capable(idmap,...
Kevin Cox's user avatar
  • 1,404
0 votes

When reading a file with `less` or `more`, how can I get the content in colors?

A simple (but multi-step) approach is to run the 'script' program, then within the script context, run your command (without piping to less), then exit the script context. You can now run less -R on ...
N Hess's user avatar
  • 1
1 vote

SSSD multiline ad_access_filter

Sadly, the basic INI file format is simply not guaranteed to support multiline anything. Individual software might implement a smarter parser, but it's not standard, and the one used by SSSD doesn't. ...
Ti Strga's user avatar
  • 121
0 votes

How can I see the details of Total banned of Fail2Ban?

On many distributions, Fail2Ban records every action it performs to the SYSLOG. You can double-check your /etc/fail2ban/fail2ban.conf and look for the command logtarget. On my CENTOS box, that line ...
Luis Alberto Barandiaran's user avatar
0 votes
Accepted

find and rename base directory and files under each basedir, add a prefix

First we recreate your structure in a TesT directory mkdir TesT; cd TesT mkdir -p G{1,2}_BIN_REFINEMENT/marker_genes/identify/intermediate_results/marker_genes/bin.{1,2} touch G{1,2}_BIN_REFINEMENT/...
Hastur's user avatar
  • 18.6k
0 votes

Glitchy white screen after the latest ubuntu 20.04 software update

Have you tried to reinstall the nvidia-driver? sudo apt install nvidia-driver-xxx where xxx is the version of your nvidia-driver. You can find the version of your nvidia-driver from https://www....
Yu Tao's user avatar
  • 101
1 vote

Does TRIM avoid the performance impact of mdadm RAID 1 on SSD?

To add to the antiquated answer, I’ve recently replaced a failed HDD on my RAID1 with an SSD, from the experimenting and research I’ve conducted, I’ve found the following: Linux md passes through ...
snake_case's user avatar
3 votes

Make Windows Detect a Hard Drive in a Similar Way as Linux Does

Due to the inner workings of a Microsoft operating system connecting a failing drive to a computer running a Microsoft operating sytem is increasing your chances to fail as DrMoishe Pippik already ...
r2d3's user avatar
  • 2,930
10 votes
Accepted

Can Expect make sure a certain log does not appear?

You can expect multiple things: expect { "license activation error" { ... mark that this happened ... } "System booted" { ... check if the above error ...
harrymc's user avatar
  • 446k
0 votes
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7z2john can't be found after installation

The binary database used by locate (/var/lib/mlocate/mlocate.db) is updated once daily by cron, so locate will not find new files, especially if locate itself was only installed today. You can fix ...
harrymc's user avatar
  • 446k
0 votes

Assign IP and a testing Domain to a VirtualBox

Configure a "Host-Only" network interface in VirtualBox. It's named that way because it doesn't do built-in NAT or any other magic, but it also doesn't have any special "host only" ...
user1686's user avatar
  • 417k

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