First login as root – Clean login – sudo will not work if you’re changing a UID on an already logged in user.
Find the user’s old UID:
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id user1 |
uid=1000(user1) ….
Change the UID:
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usermod -u 1001 user1 |
Update files and directories owned by the user to the new UID:
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find / -uid 1000 -exec chown -h 1001 '{}' \+ |
Reboot and the UID has been changed.
While moving virtual machines around, it will usually mean a change on MAC addresses on the networking interfaces, which will create new eth nodes on the machine.
Reasons for the renaming of eth nodes on the machine, is due to the persistent mapping on Linux systems using udev.
Fixing this is done by removing the entities in the /etc/udev/rules.d/70-persistent-net.rules and reboot the machine.
Simple wake-on-lan script, to wake up a WoL enabled computer when it receives a connection. This script is currently running on an old router.
It requires the wol command.
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#!/usr/bin/php -q <?php if (!function_exists('pcntl_fork')) die('PCNTL functions not available on this PHP installation'); declare(ticks=1); //Configuration! $addressBind = '192.168.1.5'; $portBind = 10066; $wolEnabledIP = '192.168.1.3'; $wolEnabledNetwork = '192.168.1.255'; $wolEnabledMAC = '00:12:34:56:78:90'; //End-Configuration! $pid = pcntl_fork(); if ($pid == -1) { die('could not fork'); } else if ($pid) { exit; } else { //we are the child } if (posix_setsid() == -1) { die("could not detach from terminal"); } //Write pid $posid=posix_getpid(); $fp = fopen("/var/run/wol-daemon.pid", "w"); fwrite($fp, $posid); fclose($fp); //Signal handlers pcntl_signal(SIGTERM, "sig_handler"); pcntl_signal(SIGHUP, "sig_handler"); function sig_handler($signo) { switch ($signo) { case SIGTERM: exit; break; } } /* Allow the script to hang around waiting for connections. */ set_time_limit(0); //Turn on implicit output flushing so we see what we're getting as it comes in. ob_implicit_flush(); if (($sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)) === false) { echo "socket_create() failed: reason: " . socket_strerror(socket_last_error()) . "\n"; } if (socket_bind($sock, $addressBind, $portBind) === false) { echo "socket_bind() failed: reason: " . socket_strerror(socket_last_error($sock)) . "\n"; } if (socket_listen($sock, 5) === false) { echo "socket_listen() failed: reason: " . socket_strerror(socket_last_error($sock)) . "\n"; } do { if (($msgsock = socket_accept($sock)) === false) { echo "socket_accept() failed: reason: " . socket_strerror(socket_last_error($sock)) . "\n"; break; } $fp = @fsockopen($wolEnabledIP, 139, $errno, $errstr, 1); //The WoL enabled computer is running Windows, that's why we are testing on port 139. if (!$fp) { $msg = "\nSince Celina is not up, I will try to wake her up for you\nPlease wait...\n"; socket_write($msgsock, $msg, strlen($msg)); pclose(popen("wol -i '.$wolEnabledNetwork.' -p 7 ".$wolEnabledMAC, "r")); while(true) { sleep(1); $fpC = @fsockopen($wolEnabledIP, 139, $errno, $errstr, 1); if (!$fpC) { continue; } else { $msg = "Celina is up and spinning, feel free get the hell out! ;-)\n"; socket_write($msgsock, $msg, strlen($msg)); break; } } } else { $msg = "\nCelina is up, so what is your point?\n"; socket_write($msgsock, $msg, strlen($msg)); fclose($fp); } socket_write($msgsock, $msg, strlen($msg)); socket_close($msgsock); } while (true); socket_close($sock); |
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