-sS https://downloads.mariadb.com/MariaDB/mariadb_repo_setup
bash: -sS: command not found
root@serv:~# wget curl -k -o add_system --data "@clientsystem-20170309155926.xml" "http://openauditsystem/open-audit/index.php/system/add_system"
wget: unrecognized option '--data'
Usage: wget [OPTION]... [URL]...

Try `wget --help' for more options.
root@serv:~# -sS https://downloads.mariadb.com/MariaDB/mariadb_repo_setup | sudo bash
bash: sudo: command not found
bash: -sS: command not found
root@serv249242:~# apt update
Ign:1 http://ftp.pl.debian.org/debian stretch InRelease
Hit:2 http://ftp.pl.debian.org/debian stretch-updates InRelease
Hit:3 http://ftp.pl.debian.org/debian stretch Release
Ign:4 http://ppa.launchpad.net/chris-lea/redis-server/ubuntu focal InRelease
Hit:5 http://security.debian.org/debian-security stretch/updates InRelease
Ign:6 http://ppa.launchpad.net/ondrej/php/ubuntu focal InRelease
Err:7 http://ppa.launchpad.net/chris-lea/redis-server/ubuntu focal Release
  404  Not Found [IP: 91.189.95.83 80]
Err:8 http://ppa.launchpad.net/ondrej/php/ubuntu focal Release
  404  Not Found [IP: 91.189.95.83 80]
Reading package lists... Done
E: The repository 'http://ppa.launchpad.net/chris-lea/redis-server/ubuntu focal Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'http://ppa.launchpad.net/ondrej/php/ubuntu focal Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
and second is bash: bash:: command not found
root@serv2:~# curl: (23) Failed writing body (0 != 16110)
bash: syntax error near unexpected token `23'
root@serv:~# curl: (23) Failed writing body (0 != 16110)