Linux USB Port As A 'flash Disk'

First thank you for all the input, it's been helpful. Now, I've been having issues with using external drives (usb\cd/dvd)but when I used an old 3.5 usb device the pc will see it. Is there a way to get it to see a flash drive or cd drive. thank you for being understanding and patient with me. I'm new to using(thinking out side of windows) Linux.

Hi,

So, I am learning meteor.js and signed up for a (cheap, i.e no support) VPS to host my Meteor app. Everything is running fine but I am trying to understand better how Linux works so here is my question:

I am running CentOS 7 on the VPS but it still uses iptables for its firewall.

I had to enable port 80 to access the web server. However, if I reboot the server, it stops working until I do
Code:

iptables -F

Then everything works. But I am thinking that -F might not be the best thing. I have changed the default SSH port from 22 to something else and that also works but I don't think I ever added it to the iptables rules.

If I do a port scan, the new SSH port is indicated as open as well as port 80 but others are closed as they are supposed to be.

Any idea what is doing on behind the scenes that requires iptables -F for the web access to work properly and if I shouldn't be doing iptables -F (I have it in the rc.local file), what is the right way of doing it?

(BTW, I am computer literate but not that familiar with Linux, which I am trying to learn now.)


Kamal

I just find my server have the below link , it use port 1328 , I checked it called ewall , would advise what is the use of 1328 ewall port in my case ? why it need to use port to access the web , why it can not direct access without the port ? thanks

https://mydomain.com:1328/xxx/xxx/test.html

Hi all,

I understand that Linux by default will limit its Ephemeral port allocation between 32768 to 61000.

I need to identify the applications running on my box (around 500 of them) which are intentionally using a port which happens to be in Ephemeral port range. Objective is to get a list of those apps and flag it so that the developers get to know of it and change their application port.

When I run netstat -nap to get a list of listen ports, I am unable to figure out if the port in Ephemeral range is actually allocated by OS or one of my apps has done it.


Thanks,
linux_it_is

Hi

We are going to move some servers from one location to another. How to verify whether the cables are connected to the right interface port?

like one server has eth0 active and eth1 is down. now if the tech guys connect the cable on eth1 port then how to know that

Is it /sys/class/net/eth1 and look for carrier or there is a better way ?

thanks in advance

Ok I'm really new at this . Not the old DOS I'm used to. I'm trying to setup my home server using Ubuntu 12.0.4, I've had no success. I have an actual raid sever I'm using. Loaded first HD with Ubuntu 12.0.4, now trying to setup so I can access from anywhere. Remember I'm a newbie so try and keep it simple until I learn Linux. I have my router setup for port forward using 192.168.100 port 21. everything I looked at so far is pretty complicated for a new user. Any help would be great.

Hi,
I am new to Linux. Do the Linux DNS server only require port 53 to be opened? my client using Windows OS. Do I Dynamic RPC port to be opened as well?

Hi,
I am trying to write to usb flash drive using a C program. I have just created some files in USB device and doing my tasks using fopen,fread and fwrite on those files. I was just wondering what is the standard data rate that can be achieved using fwrite() on a file in usb. Secondly what is better way of transferring data to USB flash drive using C Program? Obviously I am a newbie

Regards
AB

Hi all,

I have a device which has a Compact Flash card and a SSD. The file system is split so that everything except "/home" is stored on the compact flash card.

On the compact flash I am experiencing partition table corruption due to power loses when writing to the CF card.

One solution to this is to move everything onto the solid state drive, but as this is also flash memory - is the rish of corruption still the same as using the CF card?

Thanks in advance for any replies.

Lots of posts on internet about flash drives ending up read-only in Linux after using on a windows or mac systme. Gather it is a problem with incorrectly ejecting or the ejection being poorly done.

Usually I can go back to the box and re-eject and all is well. This time even GParted and the resident fedora 21 Disk Utility programs did not even see the drive (which Was visible under "files").

Using disk utility on the "offending" machine, it seems there were many files that were truncated (due to some eject issue? Note the ejection was done "according to Hoyle" ); regardless the flash drive was still read-only. Howeverk, re-trying GParted, which now recognized the drive, the drive was unmounted checked. Some repair was necessary. Currently, I can read, write and copy within the drive.

However, the drive itself is still only read-only for all but the owner (which is not even root). I cannot copy any file to the flash drive. Chmod does nothing (no matter if root or other user tries). I suppose I should be satisfied for the access there is, but if anyone has any more suggestions, it would be great.

Thanks in advance for any info/interest