Audacity Import Filter Curve in Ubuntu […]
Audacity Import Filter Curve in Ubuntu
The import feature in Audacity Filter Curve Plugin is disabled on Ubuntu. Save feature worked. So what I did was to save a preset, then edit it, replace it with the preset you need. To import Josh Meyer’s Male EQ preset available at https://drive.google.com/file/d/163aSM4c-I6REKDqIzD9IzwiyDR4cXqma/view First saved one of the preset. It asked for a name, […]
lspci
lspci command is used to list PCI devices on your computer. To see all lspci command-line options
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root@first-vm:~# lspci help Usage: lspci [<switches>] Basic display modes: -mm Produce machine-readable output (single -m for an obsolete format) -t Show bus tree Display options: -v Be verbose (-vv or -vvv for higher verbosity) -k Show kernel drivers handling each device -x Show hex-dump of the standard part of the config space -xxx Show hex-dump of the whole config space (dangerous; root only) -xxxx Show hex-dump of the 4096-byte extended config space (root only) -b Bus-centric view (addresses and IRQ's as seen by the bus) -D Always show domain numbers -P Display bridge path in addition to bus and device number -PP Display bus path in addition to bus and device number Resolving of device ID's to names: -n Show numeric ID's -nn Show both textual and numeric ID's (names & numbers) -q Query the PCI ID database for unknown ID's via DNS -qq As above, but re-query locally cached entries -Q Query the PCI ID database for all ID's via DNS Selection of devices: -s [[[[<domain>]:]<bus>]:][<slot>][.[<func>]] Show only devices in selected slots -d [<vendor>]:[<device>][:<class>] Show only devices with specified ID's Other options: -i <file> Use specified ID database instead of /usr/share/misc/pci.ids.gz -p <file> Look up kernel modules in a given file instead of default modules.pcimap -M Enable `bus mapping' mode (dangerous; root only) PCI access options: -A <method> Use the specified PCI access method (see `-A help' for a list) -O <par>=<val> Set PCI access parameter (see `-O help' for a list) -G Enable PCI access debugging -H <mode> Use direct hardware access (<mode> = 1 or 2) -F <file> Read PCI configuration dump from a given file root@first-vm:~# |
To list all PCI devices
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root@first-vm:~# lspci 00:00.0 Host bridge: Intel Corporation Core Processor DMI (rev 11) 00:03.0 PCI bridge: Intel Corporation Core Processor PCI Express Root Port 1 (rev 11) 00:08.0 System peripheral: Intel Corporation Core Processor System Management Registers (rev 11) 00:08.1 System peripheral: Intel Corporation Core Processor Semaphore and Scratchpad Registers (rev 11) 00:08.2 System peripheral: Intel Corporation Core Processor System Control and Status Registers (rev 11) 00:08.3 System peripheral: Intel Corporation Core Processor Miscellaneous Registers (rev 11) 00:10.0 System peripheral: Intel Corporation Core Processor QPI Link (rev 11) 00:10.1 System peripheral: Intel Corporation Core Processor QPI Routing and Protocol Registers (rev 11) 00:1a.0 USB controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 05) 00:1c.0 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 1 (rev 05) 00:1d.0 USB controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 05) 00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev a5) 00:1f.0 ISA bridge: Intel Corporation 3420 Chipset LPC Interface Controller (rev 05) 00:1f.2 SATA controller: Intel Corporation 5 Series/3400 Series Chipset 6 port SATA AHCI Controller (rev 05) 01:00.0 Serial Attached SCSI controller: Broadcom / LSI SAS2008 PCI-Express Fusion-MPT SAS-2 [Falcon] (rev 02) 02:00.0 Ethernet controller: Broadcom Inc. and subsidiaries NetXtreme II BCM5716 Gigabit Ethernet (rev 20) 02:00.1 Ethernet controller: Broadcom Inc. and subsidiaries NetXtreme II BCM5716 Gigabit Ethernet (rev 20) 03:03.0 VGA compatible controller: Matrox Electronics Systems Ltd. MGA G200eW WPCM450 (rev 0a) ff:00.0 Host bridge: Intel Corporation Core Processor QuickPath Architecture Generic Non-Core Registers (rev 04) ff:00.1 Host bridge: Intel Corporation Core Processor QuickPath Architecture System Address Decoder (rev 04) ff:02.0 Host bridge: Intel Corporation Core Processor QPI Link 0 (rev 04) ff:02.1 Host bridge: Intel Corporation Core Processor QPI Physical 0 (rev 04) ff:03.0 Host bridge: Intel Corporation Core Processor Integrated Memory Controller (rev 04) ff:03.1 Host bridge: Intel Corporation Core Processor Integrated Memory Controller Target Address Decoder (rev 04) ff:03.2 Host bridge: Intel Corporation Core Processor Integrated Memory Controller Test Registers (rev 04) ff:03.4 Host bridge: Intel Corporation Core Processor Integrated Memory Controller Test Registers (rev 04) ff:04.0 Host bridge: Intel Corporation Core Processor Integrated Memory Controller Channel 0 Control Registers (rev 04) ff:04.1 Host bridge: Intel Corporation Core Processor Integrated Memory Controller Channel 0 Address Registers (rev 04) ff:04.2 Host bridge: Intel Corporation Core Processor Integrated Memory Controller Channel 0 Rank Registers (rev 04) ff:04.3 Host bridge: Intel Corporation Core Processor Integrated Memory Controller Channel 0 Thermal Control Registers (rev 04) ff:05.0 Host bridge: Intel Corporation Core Processor Integrated Memory Controller Channel 1 Control Registers (rev 04) ff:05.1 Host bridge: Intel Corporation Core Processor Integrated Memory Controller Channel 1 Address Registers (rev 04) ff:05.2 Host bridge: Intel Corporation Core Processor Integrated Memory Controller Channel 1 Rank Registers (rev 04) ff:05.3 Host bridge: Intel Corporation Core Processor Integrated Memory Controller Channel 1 Thermal Control Registers (rev 04) root@first-vm:~# |
To get detailed list
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lspci -knn |
bash: lspci: command not found […]
Linux tr command (translate)
The tr command is used to translate text. Example
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root@ok:~# echo "serverok" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ SERVEROK root@ok:~# |
You can also use
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root@ok:~# echo "serverok" | tr "a-z" "A-Z" SERVEROK root@ok:~# |
To change specific chars
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root@ok:~# echo "serverok" | tr "sok" "SOK" ServerOK root@ok:~# |
To delete char, use -d option
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root@ok:~# echo "serverok" | tr -d "ok" server root@ok:~# |
See Linux Commands […]
Skype public key is not available
I have Ubuntu 20.04 computer with skype installed. When I update software using apt update, I get an error
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W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: https://repo.skype.com/deb stable InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 1F3045A5DF7587C3 W: Failed to fetch https://repo.skype.com/deb/dists/stable/InRelease The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 1F3045A5DF7587C3 W: Some index files failed to download. They have been ignored, or old ones used instead. |
To fix this error, delete the key
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sudo apt-key del 1F3045A5DF7587C3 |
Add the key again with
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sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 1F3045A5DF7587C3 |
Now you can update software with
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sudo apt update sudo apt upgrade -y |
See Skype […]
lxc error Unable to fetch GPG key from keyserver
When i create an lxc container on the Ubuntu server, I get an error
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root@instance-20210627-0830:~# lxc-create -t download -n ok Setting up the GPG keyring ERROR: Unable to fetch GPG key from keyserver lxc-create: ok: lxccontainer.c: create_run_template: 1616 Failed to create container from template lxc-create: ok: tools/lxc_create.c: main: 319 Failed to create container ok root@instance-20210627-0830:~# |
To fix this, you can run
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export DOWNLOAD_KEYSERVER="keyserver.ubuntu.com" |
To make it permanent, add it to .bashrc
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vi ~/.bashrc |
At the end of the file, add
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export DOWNLOAD_KEYSERVER="keyserver.ubuntu.com" |
Method 2 You can specify DOWNLOAD_KEYSERVER environment variable for the command with
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DOWNLOAD_KEYSERVER="keyserver.ubuntu.com" lxc-create -t download -n mycontainer -- -d ubuntu -r focal -a amd64 |
Method 3 Use […]
configure: error: Couldn’t find pcre.h, try installing the libpcre
When installing PHP OAuth, I get the following error
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configure: error: Couldn't find pcre.h, try installing the libpcre development/headers package ERROR: `/tmp/pear/temp/oauth/configure --with-php-config=/usr/bin/php-config' failed |
To fix, install libpcre3-dev
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apt install libpcre3-dev |
See Errors […]
How to cut lines separated by multiple spaces?
cut is a Linux command that can be used to cut a line of text with a specific delimiter. I want to cut lines separated by multiple spaces like Since the fields are separated by multiple spaces, I can’t just use cut -d’ ‘ command. What you can do is combine multiple spaces into one […]
How to fix WordPress 404 error in Webuzo
Webuzo hosting control panel has the option for selecting web servers Apache or Nginx. On a server using Nginx, after uploading the WordPress site and restoring the database, the website home page worked. When I clicked on any web page, I get a 404 Page not found error. To fix this, you need to add […]
How to install and use rdesktop
rdesktop is an open-source client for connecting to windows using Windows Remote Desktop Services. To install rdesktop on CentOS/Fedora run
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yum install rdesktop |
To install rdesktop on Ubuntu/Debian servers, run
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apt install rdesktop |
To connect a server with rdesktop
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rdesktop -u administrator SERVER_IP |
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