OC Debian 11
root@s0:~# /srv/gameap/ftp.sh install
Hit:1 http://security.debian.org/debian-security bullseye-security InRelease
Hit:2 http://packages.gameap.ru/debian bullseye InRelease
Hit:3 http://mirror.nl.leaseweb.net//debian bullseye InRelease
Reading package lists... Done

Checking for curl...
Detected curl...

Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Note, selecting 'proftpd-core' instead of 'proftpd'
The following additional packages will be installed:
  libhiredis0.14 libmemcached11 libmemcachedutil2 proftpd-doc
Suggested packages:
  openbsd-inetd | inet-superserver proftpd-mod-ldap proftpd-mod-mysql
  proftpd-mod-odbc proftpd-mod-pgsql proftpd-mod-sqlite proftpd-mod-geoip
  proftpd-mod-snmp proftpd-mod-crypto proftpd-mod-wrap
The following NEW packages will be installed:
  libhiredis0.14 libmemcached11 libmemcachedutil2 proftpd-core proftpd-doc
0 upgraded, 5 newly installed, 0 to remove and 2 not upgraded.
Need to get 4,425 kB of archives.
After this operation, 9,214 kB of additional disk space will be used.
Get:1 http://mirror.nl.leaseweb.net//debian bullseye/main amd64 libhiredis0.14 amd64 0.14.1-1 [35.5 kB]
Get:2 http://mirror.nl.leaseweb.net//debian bullseye/main amd64 libmemcached11 amd64 1.0.18-4.2 [94.5 kB]
Get:3 http://mirror.nl.leaseweb.net//debian bullseye/main amd64 libmemcachedutil2 amd64 1.0.18-4.2 [22.3 kB]
Get:4 http://mirror.nl.leaseweb.net//debian bullseye/main amd64 proftpd-core amd64 1.3.7a+dfsg-12+deb11u2 [2,577 kB]
Get:5 http://mirror.nl.leaseweb.net//debian bullseye/main amd64 proftpd-doc all 1.3.7a+dfsg-12+deb11u2 [1,696 kB]
Fetched 4,425 kB in 0s (9,374 kB/s)
Selecting previously unselected package libhiredis0.14:amd64.
(Reading database ... 30564 files and directories currently installed.)
Preparing to unpack .../libhiredis0.14_0.14.1-1_amd64.deb ...
Unpacking libhiredis0.14:amd64 (0.14.1-1) ...
Selecting previously unselected package libmemcached11:amd64.
Preparing to unpack .../libmemcached11_1.0.18-4.2_amd64.deb ...
Unpacking libmemcached11:amd64 (1.0.18-4.2) ...
Selecting previously unselected package libmemcachedutil2:amd64.
Preparing to unpack .../libmemcachedutil2_1.0.18-4.2_amd64.deb ...
Unpacking libmemcachedutil2:amd64 (1.0.18-4.2) ...
Selecting previously unselected package proftpd-core.
Preparing to unpack .../proftpd-core_1.3.7a+dfsg-12+deb11u2_amd64.deb ...
Unpacking proftpd-core (1.3.7a+dfsg-12+deb11u2) ...
Selecting previously unselected package proftpd-doc.
Preparing to unpack .../proftpd-doc_1.3.7a+dfsg-12+deb11u2_all.deb ...
Unpacking proftpd-doc (1.3.7a+dfsg-12+deb11u2) ...
Setting up proftpd-doc (1.3.7a+dfsg-12+deb11u2) ...
Setting up libmemcached11:amd64 (1.0.18-4.2) ...
Setting up libhiredis0.14:amd64 (0.14.1-1) ...
Setting up libmemcachedutil2:amd64 (1.0.18-4.2) ...
Setting up proftpd-core (1.3.7a+dfsg-12+deb11u2) ...
Adding system user `proftpd' (UID 107) ...
Adding new user `proftpd' (UID 107) with group `nogroup' ...
Not creating home directory `/run/proftpd'.
Adding system user `ftp' (UID 108) ...
Adding new user `ftp' (UID 108) with group `nogroup' ...
Creating home directory `/srv/ftp' ...
'/usr/share/proftpd/templates/welcome.msg' -> '/srv/ftp/welcome.msg.proftpd-new'
Synchronizing state of proftpd.service with SysV service script with /lib/systemd/systemd-sysv-install.
Executing: /lib/systemd/systemd-sysv-install enable proftpd
Created symlink /etc/systemd/system/multi-user.target.wants/proftpd.service → /lib/systemd/system/proftpd.service.
Job for proftpd.service failed because the control process exited with error code.
See "systemctl status proftpd.service" and "journalctl -xe" for details.
dpkg: error processing package proftpd-core (--configure):
 installed proftpd-core package post-installation script subprocess returned error exit status 1
Processing triggers for man-db (2.9.4-2) ...
Processing triggers for libc-bin (2.31-13+deb11u2) ...
Errors were encountered while processing:
 proftpd-core
E: Sub-process /usr/bin/dpkg returned an error code (1)
Unable to install proftpd.
Package installation aborted.