Magister

that happens when you have a dynamic ip leased from your provider, always good to check if you have issues

you would need to get familar with crontab and how to do upstart programs, but if you go headless (no screen, keyboard or mouse) then you just need to have a telnet or ssh server running on it for access, also screen will be very useful. you can script it so things will run as specific users without the need to log on if you set it up correctly, also with screen you can issue commands to the minecraft server automaticly at specific times

restarting can be handled just by the scheduler, and restarting the minecraft serve can be done in a similar way, the only thing you will need scripting for it saving the server and turning it off. under windows i am not sure how you would grab the console and input commands, under linux this is much easier

update your java and make sure your video driver is up to date as well, then give it another try

sounds like you have a id mismatch, but without logs it is hard to help

power converters 2 has an infinite eneryg loop and i believe it is in at least one of the tekkit types, unless it has already been fixed by powercrystals

check any firewall you may have running

windows has a build in scheduler, it will be able to do what you want, you might have to right a batch file or two for it to call

check your ifconfig, makes sure that the settings are correct or change some if they seem odd, you might want to get another nic to try out bonding if you have router to support it, it is not very hard to do in ubuntu and can drasticly help. i have been there with very similar errors before and it corrected it and fix the lag that was experienced while playing, you may also want to use netstat to see what is going on with that nic while everything is running and after or during a crash if you can.

i have had a similar issue with a server and ended up having the bond the ethernets in order to handle the players, if you are using a gigabit ethernet make sure to have jumboframes enabled and you may want to check some of the adapter settings

if you have alot of players on and your network can not handle the amount of data being sent or recieved you will get lag like that due to a bottleneck type effect

"failed to bind to port" generally that means you have something running on that port already since you have linux you can use nmap or netstat to see what is running on what ports

ram is not as important as raw processing power, for only 4 people you can get away with as little as 1 gb or ram, and as for sql some mods make use of it, like forge essentials for example

check the ip address of the server and make sure you are entering it correctly, double check your port forwarding. if you are hosting the server localy on your own network try giving the server a static address

is your cpu usage read out for total usage across all cores or are you looking at per core? the main server task will use only one core to run and tends to contain most of the mods that are running, and all the connections for the players, that is why a high speed cpu is better than a lower speed with lots of cores for server hosing. if you feel it is network lag then see if you can use the netstat command to look at the connects and if any are backing up

install java 64 for your os if you are sure you have a 64 bit os and then add the file path for the 64 bit java to the batch file. also to test you can call java in cmd with -d32 or -d64 to see if you have one or both installed, it will either say it doesnt exsist or it will list the help topics

i assume you are running server and client on the same machine? and the client crash log is listing the problematic frame as msvcr100.dl, which is microsoft visual C++ redistributable now i would try reinstalling java first since neither is working and try running them again

http://forums.technicpack.net/threads/3-1-3-reported-issues-and-possible-fixes.30863/#post-258589 has the fix, forum search is a wonderful thing

set up a new server in a new directory and create a new world, if you have the same problem then chances are that it is something with java and yes i see you said you reinstalled java, you should make sure that you fully removed the old java and verify system variable paths to make sure it is using the newly installed java other option would be to completly remove the enderchest mod and see if it allows you to load the server

i would suggest backing up your player data and then deleting it if you are able to connect just fine then you may have an item id conflict, as i know it causes that error

clear cache and redownload, see if problem comes back

if you had bothered using google http://thetekkit.wikia.com/wiki/Tutorial/How_to_make_a_Tekkit_Server has the solution to that exact error and problem, data corruption most likely due to your computer crashing, if you are still unable to run the server after full reinstalls then you may want to make sure the windows filesystem is fully intact and make sure nothing else has become corrupted or damaged as a note, if you have any programs running when a comptuer crashes then you run the risk of data coruption and lose if you suddenly turn off the computer while it is running you can cause physical damage to the HD and cause data corruption and lose you may want to find the cause of the crash if it is an on going thing

i have seen that same error show up in non tekkit servers today as well, but a log would be helpful

if you are using hamachi and windows you need to adjust the adapter priority so that the server will bind to highest priority device, which is true for all vpns and hosting on windows you can also manually adjust metric and advanced settings to do the same thing which is the better route after applying port forwarding did you use anything to check to see if the port is actually open and forwarded correctly? the computer you are using for the server does it have a static ip? are you using any vpn programs to handle the connections?

netherores reads as corrupt if you are using java older than java 7, update your java and then make sure that the update is reflected in your system variable path