$ sudo apt-cache show rfkill | grep Filename
Filename: pool/main/u/util-linux/rfkill_2.37.2-4ubuntu3_amd64.deb
$ grep "jammy main" /etc/apt/sources.list
deb http://ru.archive.ubuntu.com/ubuntu/ jammy main restricted$ sudo dpkg -i rfkill_2.37.2-4ubuntu3_amd64.deb
$ man killall
...
killall sends a signal to all processes running any of the specified commands. If no signal
name is specified, SIGTERM is sent.
...
-w, --wait
Wait for all killed processes to die. killall checks once per second if any
of the killed processes still exist and only returns if none are left. Note
that killall may wait forever if the signal was ignored, had no effect, or if
the process stays in zombie state.$ man ssh-copy-id
...
-i identity_file
Use only the key(s) contained in identity_file (rather than looking for identities via ssh-add(1)
or in the default_ID_file). If the filename does not end in .pub this is added. If the filename
is omitted, the default_ID_file is used.
...$ sudo fallocate -l 16G /optibay/swapfile
$ sudo chmod 600 /optibay/swapfile
$ sudo mkswap /optibay/swapfileapt-install php-pdo-mysqlapt search php | grep pdo | grep mysql
apache2: Syntax error on line 80 of /etc/apache2/apache2.conf: DefaultRuntimeDir must be a valid directory, absolute or relative to ServerRoot