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Category Archives: Linux

Suppression of DHCP servers (dhcdrop)

dhcdrop is a utility for suppressing unnecessary DHCP servers and stress testing.

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Posted byVyacheslav26.03.201926.03.2019Posted inLinux, SecurityTags: DHCP, PerformanceLeave a comment on Suppression of DHCP servers (dhcdrop)

Backup ABillS

I will describe an example of backup ABillS billing system.

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Posted byVyacheslav25.03.201912.10.2019Posted inABillSLeave a comment on Backup ABillS

Transferring a running Ubuntu system to another disk

On the test, I use the Ubuntu Server 14.04.5 LTS system.

And so, on a running system, switch to root user:

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Posted byVyacheslav25.03.201925.03.2019Posted inLinuxTags: GRUB, RecoveryLeave a comment on Transferring a running Ubuntu system to another disk

Installing and using ifstat on Linux

ifstat is a program for collecting statistics on network interface load.

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Posted byVyacheslav22.03.201922.03.2019Posted inMonitoring, NetworksLeave a comment on Installing and using ifstat on Linux

Installing Quagga on Ubuntu Server 18

I will give an example of installing Quagga in Ubuntu Server 18.04 (bionic).

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Posted byVyacheslav21.03.201914.10.2022Posted inLinux, NetworksTags: QuaggaLeave a comment on Installing Quagga on Ubuntu Server 18

Preparing a Linux server before installing Accel-ppp

Here are some recommendations for setting up a server on which Accel-ppp will work.

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Posted byVyacheslav20.03.201926.01.2023Posted inABillS, LinuxTags: accel-pppLeave a comment on Preparing a Linux server before installing Accel-ppp

Notice “Call from X to extension X rejected because extension not found in context X”

Once I was asked by a client to see why he could not get through to one of the numbers.
I opened the asterisk console:

Continue reading “Notice “Call from X to extension X rejected because extension not found in context X””
Posted byVyacheslav17.03.201912.01.2020Posted inAsteriskLeave a comment on Notice “Call from X to extension X rejected because extension not found in context X”

Nextcloud two-factor authentication

I will give an example of setting up two-factor authentication in Nextcloud using Google Authenticator.

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Posted byVyacheslav15.03.201915.03.2019Posted inLinux, SecurityTags: NextcloudLeave a comment on Nextcloud two-factor authentication

Copying data to Nextcloud via FTP

Suppose you need to copy data via FTP to Nextcloud.
Configure the FTP server if it is not configured, for example, as I described in the article:
Configuring ProFTPd with virtual users in a file

Create an FTP user that will work on behalf of the user and the www-data (uid 33) group:

Continue reading “Copying data to Nextcloud via FTP”
Posted byVyacheslav15.03.201914.04.2023Posted inLinuxTags: Cloud, Nextcloud1 Comment on Copying data to Nextcloud via FTP

Backup script example

I will write below a simple example of backing up mysql databases using mysqldump.

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Posted byVyacheslav13.03.201913.03.2019Posted inBackup, Linux, ScriptsLeave a comment on Backup script example

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