Category Archives: Operating Systems

← Older posts
21
01
25
 2 Comments

Migrating a WordPress website from PHP 7.4 to PHP 8.3.6

Posted by | PHP, Ubuntu |

Added the following

define( 'WP_DEBUG', true );
define( 'WP_DEBUG_LOG', true );

to wp-config.php and got the following error message:

Fatal error: Uncaught Error: Call to undefined function wp_kses() in /home/devnote/www/wp-includes/functions.php:6073 
Stack trace:
#0 /home/devnote/www/wp-includes/functions.php(5554): wp_trigger_error()
#1 /home/devnote/www/wp-includes/class-wpdb.php(1333): _deprecated_function()
#2 /home/devnote/www/wp-content/sunrise.php(11): wpdb->escape()
#3 /home/devnote/www/wp-includes/ms-settings.php(47): include_once('...')
#4 /home/devnote/www/wp-settings.php(155): require('...')
#5 /home/devnote/www/wp-config.php(107): require_once('...')
#6 /home/devnote/www/wp-load.php(50): require_once('...')
#7 /home/devnote/www/wp-blog-header.php(13): require_once('...')
#8 /home/devnote/www/index.php(17): require('...')
#9 {main} thrown in /home/devnote/www/wp-includes/functions.php on line 6073
(more…)
20
01
25
 3 Comments

Creating Docker network for hosting legacy PHP websites

Posted by | Ubuntu | Tagged |

Running test Docker containers

sudo docker network create --subnet=172.20.0.0/16 legacy_net
sudo docker network ls

NETWORK ID     NAME               DRIVER    SCOPE
61aa4a19ec0c   bridge             bridge    local
7c0ebcfd4e3a   dockovpn_default   bridge    local
79ed9c355254   host               host      local
99d8bde8e488   legacy_net         bridge    local
086455f026a8   none               null      local
(more…)
15
01
25
 25 Comments

Migrating my VPS from Ubuntu 16.04 to Ubuntu 24.04

Posted by | Ubuntu |

Migrating the users and groups

Copied my groups from /etc/group:

dmitriano:x:1000:
slogpost:x:1001:www-data,bak
beauty:x:1009:www-data,bak
test1:x:1012:www-data,beauty,dmitriano,devnote,bak
test2:x:1013:www-data,bak
devnote:x:1018:www-data,bak
exchange:x:1025:
git:x:1026:www-data,bak
game:x:1027:www-data,bak
shar:x:1029:www-data,bak
bak:x:1032:
(more…)
13
01
25
 3 Comments

Using tcpdump with OpenVPN

Posted by | Ubuntu | Tagged , |

VPN service opens tun0 device in the docker container:

sudo docker exec -it 966f926484bc sh
/opt/Dockovpn # ifconfig

eth0      Link encap:Ethernet  HWaddr 02:42:AC:11:00:03
          inet addr:172.17.0.3  Bcast:172.17.255.255  Mask:255.255.0.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:20553 errors:0 dropped:0 overruns:0 frame:0
          TX packets:20539 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:14609434 (13.9 MiB)  TX bytes:14757264 (14.0 MiB)

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

tun0      Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
          inet addr:10.8.0.1  P-t-P:10.8.0.2  Mask:255.255.255.255
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1500  Metric:1
          RX packets:7825 errors:0 dropped:0 overruns:0 frame:0
          TX packets:12572 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:500
          RX bytes:1673378 (1.5 MiB)  TX bytes:12115333 (11.5 MiB)
(more…)
12
01
25
 5 Comments

Connecting to OpenVPN from an Android device

Posted by | Ubuntu | Tagged , |

I cloned repository https://github.com/dockovpn/dockovpn and updated config/server.conf to increase the server log verbosity by setting verb to 4:

port 1194
proto %HOST_TUN_PROTOCOL%
dev tun
ca /etc/openvpn/ca.crt
cert /etc/openvpn/MyReq.crt
key /etc/openvpn/MyReq.key
dh /etc/openvpn/dh.pem
server 10.8.0.0 255.255.255.0
ifconfig-pool-persist ipp.txt
push "redirect-gateway def1 bypass-dhcp"
push "dhcp-option DNS 208.67.222.222"
push "dhcp-option DNS 208.67.220.220"
duplicate-cn
keepalive 10 120
cipher AES-256-GCM
ncp-ciphers AES-256-GCM:AES-256-CBC
auth SHA512
persist-key
persist-tun
status openvpn-status.log
verb 4
tls-server
tls-version-min 1.2
tls-auth /etc/openvpn/ta.key 0
crl-verify /etc/openvpn/crl.pem
(more…)
29
12
24
 1 Comment

Installing Windows Sandbox

Posted by | Windows |

In addition to enabling Sandbox (a special purpose limited container) you also need to enable Windows Hypervisor Platform and also Virtual Machine platform:

13
12
24
 Leave a comment

My Android Phone requires release apps to be signed

Posted by | Android |

When I try to install an unsigned release app 

adb install android-build-release-unsigned.apk

I get 

Performing Streamed Install
adb: failed to install android-build-release-unsigned.apk: Failure [INSTALL_PARSE_FAILED_NO_CERTIFICATES: Failed to collect certificates from /data/app/vmdl827870317.tmp/base.apk: Attempt to get length of null array]
(more…)
26
10
24
 3 Comments

Viewing image metadata on Ubuntu 22.04

Posted by | Ubuntu | 
sudo apt install imagemagick
identify -verbose my-image.jpg
(more…)
11
10
24
 1 Comment

Converting MP4 to GIF with ffmpeg

Posted by | Ubuntu | Tagged |

I was able to convert MP4 to GIF with ffmpeg with the following commands on Ubuntu 22.04:

ffmpeg \
  -i iphone884.mp4 \
  -r 15 \
  -vf "scale=512:-1,split[s0][s1];[s0]palettegen[p];[s1][p]paletteuse" \
  -ss 00:00:03 -to 00:00:06 \
  iphone884.gif

ffmpeg \
  -i iphone884.mp4 \
  -r 15 \
  -vf "scale=300:-1,split[s0][s1];[s0]palettegen[p];[s1][p]paletteuse" \
  iphone884.gif
20
09
24
 12 Comments

The right way to build Yandex Mobile Ads Example for iOS

Posted by | Mac OS X | Tagged |

To build the example with CocoaPods do the following steps:

Install build tools

Install Ruby with rbenv on macOS and install CocoaPods without sudo:

gem install cocoapods
(more…)
← Older posts