my all 3 servers down for no reason!!!

[BehaartesEtwas]

before your run the srcds_run command (with all those options, they look correct -> only I wouldn't run a server with "-insecure" unless you like having cheaters on your server) run the command "screen". that will open a virtual terminal window in which you can run the server. you can then disconnect from that screen session by pressing "Ctrl+A D". You can also reconnect (even from another computer) by running screen -R (if you have multiple screen sessions running, screen -R will print a list of names. put one of them behind the -R option to connect to it).

if you got so far and are willing to spend some time learning linux and server configurations you might be able to manage the servers on your own. but beware, most stuff will not work on its own and it will require some time and efford.