# Latest **URL:** https://linux-tips.com/latest.md [Latest](https://linux-tips.com/latest.md) · [Categories](https://linux-tips.com/categories.md) --- ## [Disabling UPS beep under Linux](https://linux-tips.com/t/disabling-ups-beep-under-linux/592)
**Author:** [@Greg](https://linux-tips.com/u/Greg)\ **Replies:** 3\ **Last updated:** [July 2, 2026, 7:28pm UTC](https://linux-tips.com/t/disabling-ups-beep-under-linux/592 "2026-07-02T19:28:10Z")
If you have one of the ups devices which doesn’t have an easy way to disable annoying beep sounds when the main power gets down, you can turn off the beep behaviour in most cases, even if the seller says that “there is n… --- ## [How to fix Apple iMac headphone sound problem](https://linux-tips.com/t/how-to-fix-apple-imac-headphone-sound-problem/285)
**Author:** [@demirten](https://linux-tips.com/u/demirten)\ **Replies:** 5\ **Last updated:** [December 20, 2025, 6:31pm UTC](https://linux-tips.com/t/how-to-fix-apple-imac-headphone-sound-problem/285 "2025-12-20T18:31:46Z")
Apple iMac 12,1 and 13,1 models (21.5 or 27 inch) well supported by Linux but there is an annoying problem with sound card. Builtin speakers works out of the box but when you plugged headphones, you can't hear any soun… --- ## [How to prevent Anydesk from freezing your browser when accessing /tmp](https://linux-tips.com/t/how-to-prevent-anydesk-from-freezing-your-browser-when-accessing-tmp/1127)
**Author:** [@DrSlump](https://linux-tips.com/u/DrSlump)\ **Replies:** 0\ **Last updated:** [March 22, 2025, 9:38am UTC](https://linux-tips.com/t/how-to-prevent-anydesk-from-freezing-your-browser-when-accessing-tmp/1127 "2025-03-22T09:38:13Z")
If you have AnyDesk installed, it creates numerous special files in the /tmp directory with prefixes like ad\_mailbox and ad\_connect\_queue. While AnyDesk is running, attempting to use a file upload button in a web browse… --- ## [WPS Office pdf export problem](https://linux-tips.com/t/wps-office-pdf-export-problem/1117)
**Author:** [@DrSlump](https://linux-tips.com/u/DrSlump)\ **Replies:** 0\ **Last updated:** [March 7, 2025, 7:55am UTC](https://linux-tips.com/t/wps-office-pdf-export-problem/1117 "2025-03-07T07:55:33Z")
If you’re encountering the “WPS Spreadsheets encountered an error while trying to export to PDF” message when exporting a file in WPS Office, the solution is simple: sudo apt install libtiff6 sudo ln -s /usr/lib/x86\_64-… --- ## [How to mount ubifs image with nandsim on Linux over 512MB](https://linux-tips.com/t/how-to-mount-ubifs-image-with-nandsim-on-linux-over-512mb/421)
**Author:** [@sputnik](https://linux-tips.com/u/sputnik)\ **Replies:** 2\ **Last updated:** [November 30, 2024, 6:30am UTC](https://linux-tips.com/t/how-to-mount-ubifs-image-with-nandsim-on-linux-over-512mb/421 "2024-11-30T06:30:47Z")
I have to simulate two MTD partition, first one must be 512MB and second one is 256MB in capacity to mount two ubifs images on my desktop Linux system. I'm trying to make MTD device simulation with nandsim module but s… --- ## [Opening .av ip camera video files in Linux](https://linux-tips.com/t/opening-av-ip-camera-video-files-in-linux/777)
**Author:** [@sputnik](https://linux-tips.com/u/sputnik)\ **Replies:** 1\ **Last updated:** [May 9, 2023, 2:20am UTC](https://linux-tips.com/t/opening-av-ip-camera-video-files-in-linux/777 "2023-05-09T02:20:24Z")
There are lots of cheap ip cameras in the market which saves the captured video files with .av extension and it can’t be viewed on Linux directly. When you look at the one of those files with the file command, it basica… --- ## [Solving X11 connection rejected problem with snap](https://linux-tips.com/t/solving-x11-connection-rejected-problem-with-snap/1042)
**Author:** [@DrSlump](https://linux-tips.com/u/DrSlump)\ **Replies:** 0\ **Last updated:** [February 17, 2023, 4:08pm UTC](https://linux-tips.com/t/solving-x11-connection-rejected-problem-with-snap/1042 "2023-02-17T16:08:51Z")
If you have connected a remote server while SSH XForwarding enabled and try to run a X11 program which was installed with snap, you may get a X11 connection reject error like this: $ scrcpy scrcpy 1.24 \ **Author:** [@demirten](https://linux-tips.com/u/demirten)\ **Replies:** 6\ **Last updated:** [January 18, 2023, 4:39pm UTC](https://linux-tips.com/t/disabling-reverse-dns-lookups-in-ssh/222 "2023-01-18T16:39:22Z") Sometimes it is very annoying to wait ten's of seconds to finish remote ssh server's reverse dns lookup procedure. It can be disabled on the server side but this process has a few tricks. First of all, you have to make… --- ## [RK3328 boot from SPI NOR Flash | U-Boot Building](https://linux-tips.com/t/rk3328-boot-from-spi-nor-flash-u-boot-building/859)
**Author:** [@alfa](https://linux-tips.com/u/alfa)\ **Replies:** 1\ **Last updated:** [December 21, 2022, 10:18am UTC](https://linux-tips.com/t/rk3328-boot-from-spi-nor-flash-u-boot-building/859 "2022-12-21T10:18:00Z")
Hi, I have Orange Pi R1 Plus (clone of nanopi r2s) board with rk3328 and 16MB SPI NOR Flash (MX25L12835F) I am trying to boot OpenWRT linux from SPI NOR, I compiled OpenWRT with able to fit on SPI flash. Full image siz… --- ## [Udp packet drops and packet receive error difference](https://linux-tips.com/t/udp-packet-drops-and-packet-receive-error-difference/237)
**Author:** [@demirten](https://linux-tips.com/u/demirten)\ **Replies:** 5\ **Last updated:** [November 10, 2022, 2:23pm UTC](https://linux-tips.com/t/udp-packet-drops-and-packet-receive-error-difference/237 "2022-11-10T14:23:29Z")
If you write a program which receives very high amount of udp packets, it is good to know whether all the packets processed by your program or not. To get the information about statictics of udp stack, you can use nets… --- ## [Nano end of file](https://linux-tips.com/t/nano-end-of-file/233)
**Author:** [@demirten](https://linux-tips.com/u/demirten)\ **Replies:** 1\ **Last updated:** [May 20, 2022, 6:28pm UTC](https://linux-tips.com/t/nano-end-of-file/233 "2022-05-20T18:28:58Z")
Nano is one of the simplest editor in Linux systems. It is installed by default on most Linux distributions. When working on a text file it is often required to quickly jump to the end of the file or top of the file. … --- ## [QString split with multiple delimiters](https://linux-tips.com/t/qstring-split-with-multiple-delimiters/64)
**Author:** [@RaskoX](https://linux-tips.com/u/RaskoX)\ **Replies:** 3\ **Last updated:** [April 27, 2022, 7:55am UTC](https://linux-tips.com/t/qstring-split-with-multiple-delimiters/64 "2022-04-27T07:55:40Z")
I want to split a QString into parts by using multiple delimiters , or # or | It seems that QString has regular expression support but what is the correct expression for this case? --- ## [Docker MTU problems](https://linux-tips.com/t/docker-mtu-problems/865)
**Author:** [@DrSlump](https://linux-tips.com/u/DrSlump)\ **Replies:** 0\ **Last updated:** [February 15, 2022, 9:47am UTC](https://linux-tips.com/t/docker-mtu-problems/865 "2022-02-15T09:47:31Z")
When using docker in cloud platforms (based on OpenStack or custom platforms like Hetzner) it is common to work with MTU size less than 1500. If you’re using docker in such an environment, connections from docker contai… --- ## [Finding required dll's from Linux](https://linux-tips.com/t/finding-required-dlls-from-linux/841)
**Author:** [@redsector](https://linux-tips.com/u/redsector)\ **Replies:** 0\ **Last updated:** [September 25, 2021, 7:57am UTC](https://linux-tips.com/t/finding-required-dlls-from-linux/841 "2021-09-25T07:57:06Z")
It is possible to find which DLL files are needed for a windows binary or library in Linux. To do this, you can use standard objdump utility if it supports PE format or you can install mingw cross compiler toolchains an… --- ## [Setting cursor size in Gnome](https://linux-tips.com/t/setting-cursor-size-in-gnome/835)
**Author:** [@redsector](https://linux-tips.com/u/redsector)\ **Replies:** 0\ **Last updated:** [June 24, 2021, 11:52am UTC](https://linux-tips.com/t/setting-cursor-size-in-gnome/835 "2021-06-24T11:52:06Z")
There is no default application in distributions to set cursor size but it is always possible through gsettings command line utility. To get existing cursor size: $ gsettings get org.gnome.desktop.interface cursor-size… --- ## [Reducing video size with preserving metadata and timestamp](https://linux-tips.com/t/reducing-video-size-with-preserving-metadata-and-timestamp/705)
**Author:** [@DrSlump](https://linux-tips.com/u/DrSlump)\ **Replies:** 1\ **Last updated:** [May 20, 2021, 4:30am UTC](https://linux-tips.com/t/reducing-video-size-with-preserving-metadata-and-timestamp/705 "2021-05-20T04:30:56Z")
In today, videos taken by smartphones takes too much space. It is possible to decrease video size to %35 percent without loosing much quality. To do this, you can use ffmpeg command. But after ffmpeg runs, you will los… --- ## [I cannot open the Qt application on CM4](https://linux-tips.com/t/i-cannot-open-the-qt-application-on-cm4/829)
**Author:** [@aliyolcu](https://linux-tips.com/u/aliyolcu)\ **Replies:** 0\ **Last updated:** [March 24, 2021, 7:13am UTC](https://linux-tips.com/t/i-cannot-open-the-qt-application-on-cm4/829 "2021-03-24T07:13:39Z")
Hi, I have set the buildroot image I used on 3 b + before for CM4, but I cannot run the application running on 3 b + on CM4. It gives an error like the one below, what is the reason? --- ## [Running centos6 chroots under newer Linux kernels](https://linux-tips.com/t/running-centos6-chroots-under-newer-linux-kernels/827)
**Author:** [@redsector](https://linux-tips.com/u/redsector)\ **Replies:** 0\ **Last updated:** [February 12, 2021, 11:54am UTC](https://linux-tips.com/t/running-centos6-chroots-under-newer-linux-kernels/827 "2021-02-12T11:54:10Z")
Today I realized that I couldn’t execute shell in a centos6 chroot environment while using Debian 11 and kernel 5.10: $ sudo chroot centos /bin/sh Segmentation fault While some commands like ps working properly, most o… --- ## [Gstramer error when second video recording attemp at qml camera](https://linux-tips.com/t/gstramer-error-when-second-video-recording-attemp-at-qml-camera/822)
**Author:** [@aliyolcu](https://linux-tips.com/u/aliyolcu)\ **Replies:** 3\ **Last updated:** [January 29, 2021, 7:43am UTC](https://linux-tips.com/t/gstramer-error-when-second-video-recording-attemp-at-qml-camera/822 "2021-01-29T07:43:30Z")
Hi,There is a part in the video recording application I made that does not work properly. I could not find the reason for this, after the first recorded video, while the second recording is being made, the application su… --- ## [Booting from an ISO image using qemu](https://linux-tips.com/t/booting-from-an-iso-image-using-qemu/136)
**Author:** [@demirten](https://linux-tips.com/u/demirten)\ **Replies:** 9\ **Last updated:** [January 28, 2021, 8:03pm UTC](https://linux-tips.com/t/booting-from-an-iso-image-using-qemu/136 "2021-01-28T20:03:52Z")
Qemu has two operating mode named full system emulation and user mode emulation. If you want to simulate whole system not just the cpu (like a PC) you need to use full system emulation mode. Newer distributions have se… --- ## [Installing Microsoft Sql Server on Debian Linux](https://linux-tips.com/t/installing-microsoft-sql-server-on-debian-linux/476)
**Author:** [@Greg](https://linux-tips.com/u/Greg)\ **Replies:** 1\ **Last updated:** [January 23, 2021, 4:28pm UTC](https://linux-tips.com/t/installing-microsoft-sql-server-on-debian-linux/476 "2021-01-23T16:28:02Z")
Believe it or not, Microsoft Sql Server now officially supported under Linux by the Microsoft itself! Here is the link: https://www.microsoft.com/en-us/sql-server/sql-server-vnext-including-Linux It is still on the beta… --- ## [How to force fsck to run on next boot](https://linux-tips.com/t/how-to-force-fsck-to-run-on-next-boot/256)
**Author:** [@Debuser](https://linux-tips.com/u/Debuser)\ **Replies:** 1\ **Last updated:** [December 26, 2020, 10:11am UTC](https://linux-tips.com/t/how-to-force-fsck-to-run-on-next-boot/256 "2020-12-26T10:11:17Z")
It is not possible to run fsck on actively working filesystem. You have to run it before the filesystem mounted as read-write mode. If you don't have any chance to unmount the filesystem which you want to run fsck on i… --- ## [Generate report by http hosts in tcpdump / wireshark capture](https://linux-tips.com/t/generate-report-by-http-hosts-in-tcpdump-wireshark-capture/813)
**Author:** [@DrSlump](https://linux-tips.com/u/DrSlump)\ **Replies:** 0\ **Last updated:** [December 9, 2020, 10:24am UTC](https://linux-tips.com/t/generate-report-by-http-hosts-in-tcpdump-wireshark-capture/813 "2020-12-09T10:24:19Z")
Assume that you have captured some network traffic and want to generate a report to see how many requests comes for specific http hostname. It is possible to filter by http.host or http.request.method in wireshark but i… --- ## [How can I disable snmpd ia\_addr insert messages?](https://linux-tips.com/t/how-can-i-disable-snmpd-ia-addr-insert-messages/281)
**Author:** [@RaskoX](https://linux-tips.com/u/RaskoX)\ **Replies:** 4\ **Last updated:** [November 8, 2020, 11:57am UTC](https://linux-tips.com/t/how-can-i-disable-snmpd-ia-addr-insert-messages/281 "2020-11-08T11:57:01Z")
Hi, We have Debian and Ubuntu servers which runs snmpd service. We are getting following message every 30 seconds in /var/log/syslog: error on subcontainer 'ia\_addr' insert (-1) How can we solve this problem? --- ## [Flush dnsmasq cache automatically after vpn connection](https://linux-tips.com/t/flush-dnsmasq-cache-automatically-after-vpn-connection/811)
**Author:** [@Debuser](https://linux-tips.com/u/Debuser)\ **Replies:** 0\ **Last updated:** [October 5, 2020, 7:21pm UTC](https://linux-tips.com/t/flush-dnsmasq-cache-automatically-after-vpn-connection/811 "2020-10-05T19:21:34Z")
There are some cases which will be good to flush dnsmasq internal cache. Lets assume that you have an openvpn connection profile and when you connect to vpn in network-manager, you’re getting a custom dns server address… --- ## [Fixing slow nfs mount problem](https://linux-tips.com/t/fixing-slow-nfs-mount-problem/245)
**Author:** [@demirten](https://linux-tips.com/u/demirten)\ **Replies:** 1\ **Last updated:** [August 9, 2020, 2:41am UTC](https://linux-tips.com/t/fixing-slow-nfs-mount-problem/245 "2020-08-09T02:41:37Z")
If you have a delay about 10-15 seconds when mounting shared NFS folders, check logfiles (/var/log/syslog, /var/log/messages) for a log like this: RPC: AUTH\_GSS upcall timed out If you can see similar logs, your nfs m… --- ## [Ssh agent forwarding](https://linux-tips.com/t/ssh-agent-forwarding/239)
**Author:** [@demirten](https://linux-tips.com/u/demirten)\ **Replies:** 0\ **Last updated:** [August 3, 2015, 7:37pm UTC](https://linux-tips.com/t/ssh-agent-forwarding/239 "2015-08-03T19:37:08Z")
It is common to use ssh keys for deployments on the server. But most of the time you have to setup a new ssh key for each server and these keys doesn’t have passphrase for private key to make deployments easy. Maintaini… --- ## [Couldn't start virtual machines after Proxmox 4.1 upgrade](https://linux-tips.com/t/couldnt-start-virtual-machines-after-proxmox-4-1-upgrade/317)
**Author:** [@Greg](https://linux-tips.com/u/Greg)\ **Replies:** 2\ **Last updated:** [May 16, 2020, 11:27am UTC](https://linux-tips.com/t/couldnt-start-virtual-machines-after-proxmox-4-1-upgrade/317 "2020-05-16T11:27:26Z")
We have a running Proxmox 4.0 setup on 2 Debian Jessie server with a few container machines. Recently we decided to upgrade both of the servers and Proxmox components with: $ sudo apt-get update $ sudo apt-get dist-up… --- ## [Couldn't run 64 bit programs with wine](https://linux-tips.com/t/couldnt-run-64-bit-programs-with-wine/320)
**Author:** [@MisterNo](https://linux-tips.com/u/MisterNo)\ **Replies:** 2\ **Last updated:** [May 10, 2020, 4:17am UTC](https://linux-tips.com/t/couldnt-run-64-bit-programs-with-wine/320 "2020-05-10T04:17:46Z")
I have a functional 32 bit wine environment and all of the 32 bit windows applications runs properly. But, when I want to execute any 64 bit programs it gives me following error: wine is a 32-bit installation, it ca… --- ## [Rpm package install problem](https://linux-tips.com/t/rpm-package-install-problem/787)
**Author:** [@saucompeng](https://linux-tips.com/u/saucompeng)\ **Replies:** 1\ **Last updated:** [May 3, 2020, 4:53pm UTC](https://linux-tips.com/t/rpm-package-install-problem/787 "2020-05-03T16:53:32Z")
Hi Everyone, I cross-compiled my own program on centos. After that package the output with rpmbuild. You can see file tree at the following lines. But when I want to install it to yocto build image on device, It gives a… [Next page](https://linux-tips.com/latest.md?page=1)