I don't understand...

[Ed_P]

What does this show? As guest.

ls /mnt/sdc/porteus/modules/

[donald]

@ movobojo
to see the content of the modules folder use

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guest@porteus:~$ ls $PORTDIR/modules

about the EXIT cheatcode:
Please read /boot/docs/cheatcodes.txt.

[movobojo]

Very much doubt there is any defence against a determined virus, without going to extraordinary lengths to prevent it. Maybe you can reach a level of security if you are able to disable the HDD from the BIOS.

When HDD disable in BIOS. I think PC just turn off for boot & DOS, but linux still see it.

To turn off in kernel, use parameter: libata.force=1.00:disable

Like here with port SATA0, where HD is plugged...

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root@porteus:~# uname -a
Linux porteus 4.9.0-porteus #1 SMP PREEMPT Sun Dec 18 16:24:27 Local time zone must be set-- i686 Intel(R) Pentium(R) 4 CPU 3.20GHz GenuineIntel GNU/Linux

root@porteus:~# cat /proc/cmdline
quiet initrd=initrd.xz copy2ram noauto noswap noeject libata.force=1.00:disable BOOT_IMAGE=vmlinuz 

root@porteus:~# dmesg | grep ata
[    0.141022] libata version 3.00 loaded.
[    0.370134] ata1: SATA max UDMA/133 abar m1024@0xdffffc00 port 0xdffffd00 irq 20
[    0.370137] ata2: SATA max UDMA/133 abar m1024@0xdffffc00 port 0xdffffd80 irq 20
[    0.370139] ata3: SATA max UDMA/133 abar m1024@0xdffffc00 port 0xdffffe00 irq 20
[    0.370141] ata4: SATA max UDMA/133 abar m1024@0xdffffc00 port 0xdffffe80 irq 20
[    0.370253] ata_piix 0000:00:1f.1: version 2.13
[    0.371974] scsi host4: ata_piix
[    0.373163] scsi host5: ata_piix
[    0.373233] ata5: PATA max UDMA/100 cmd 0x1f0 ctl 0x3f6 bmdma 0xffa0 irq 14
[    0.373235] ata6: PATA max UDMA/100 cmd 0x170 ctl 0x376 bmdma 0xffa8 irq 15
[    0.381257] ata6: port disabled--ignoring
[    0.538606] ata5.00: ATAPI: _NEC DVD_RW ND-3520A, 1.04, max UDMA/33
[    0.543246] ata5.00: configured for UDMA/33
[    0.677353] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
[    0.677369] ata2: SATA link down (SStatus 0 SControl 300)
[    0.680097] ata1.00: FORCE: horkage modified (disable)
[    0.680098] ata1.00: unsupported device, disabling
[    0.680100] ata1.00: disabled

Then nothing touch it.

But you know - it is virus - virus can possibly touch kernel and after reboot the virus can touch the HDD, am I right?

Anyway, I read if we turn off HDD in BIOS, the HDD still has electric power consumption. So I thing the best idea is mechanically cut HDD from electric power.

And then nothing touch it for sure finally.

[movobojo]

What does this show? As guest.

ls /mnt/sdc/porteus/modules/

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guest@porteus:~$ ls /mnt/sdc/porteus/modules/
/bin/ls: cannot access '/mnt/sdc/porteus/modules/': Permission denied
guest@porteus:~$ 

I formatted USB stick from Linux Mint and now I cannot see inside and there is a owner "vboxapp" under "Permissions" tab. ???

[movobojo]

Always, I am using nothing but Firefox module (firefox-50.1.0-i686-1.xzm).

[Ed_P]

Permission denied

hmmmm Ok, try the ls command after switching to root.

[movobojo]

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root@porteus:/home/guest# ls /mnt/sdc/porteus/modules/
root@porteus:/home/guest# 
root@porteus:/home/guest# cd ..
root@porteus:/home# cd ..
root@porteus:/# cd ..
root@porteus:/# cd ..
root@porteus:/# ls /mnt/sdc/porteus/modules/
root@porteus:/# 
root@porteus:/# 
root@porteus:/# 

It shows nothing. And by the way, thanks for your patience with me.

[movobojo]

I activated the Firefox module from desktop, and after reboot I must do it again, because the Firefox icon is gone after reboot. Should I put Firefox module to that "modules" directory? But I do not have access to that folder from desktop environment. But why I do not have access to my disc as guest? Is in my USB stick a block for guest?

[Ed_P]

It shows nothing. And by the way, thanks for your patience with me.

So I see. And you are welcome. Trust me we were all newbies at one point. (Well, except for Bogomips. )

I activated the Firefox module from desktop, and after reboot I must do it again, because the Firefox icon is gone after reboot. Should I put Firefox module to that "modules" directory?

So you are saying the Firefox module is on your desktop!! Yes, you need to put it in your /porteus/modules/ folder.

But I do not have access to that folder from desktop environment.

Yes, so you will have to cp it in root mode. And once you reboot and have access to Firefox without activating it from the desktop you can delete the desktop module.

But why I do not have access to my disc as guest? Is in my USB stick a block for guest?

I can't answer that, I don't know. I've never formatted a drive with Linux Mint. We can look at it after we get the module in the right location.

[francois]

@movobojo:
guest or normal user does not have access to folders or partitions that are root access only.

It could also happen that your home folder on hdd or other folders on your hdd could be encrypted if you have set them this way.

To access your hard disk drive (hdd) try:

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guest@porteus:/root$ su
Password: 
root@porteus:~# thunar
root@porteus:~#

And try to access your files.

Midnight commander could also be useful:

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guest@porteus:/root$ su
Password: 
root@porteus:~# mc
root@porteus:~#

[donald]

I cannot see inside ...

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guest@porteus:~$ ls /mnt/sdc/porteus/modules/

Of course not.....sdc is a drive, not a partition --> sdc1 or whatever

OR as i said before

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guest@porteus:~$ ls $PORTDIR/modules

[Ed_P]

Of course not.....sdc is a drive, not a partition --> sdc1 or whatever

But there is no partition number in these ls sdc commands.

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guest@porteus:~$ su
Password: 
root@porteus:/home/guest# cd ..
root@porteus:/home# cd ..
root@porteus:/# ls
bin/  etc/   lib/    mnt/  proc/  run/   srv/  tmp/  var/
dev/  home/  media/  opt/  root/  sbin/  sys/  usr/
root@porteus:/# cd mnt
root@porteus:/mnt# ls
live/  sda1/  sda2/  sda3/  sdb1/  sdc/
root@porteus:/mnt# cd sdc
root@porteus:/mnt/sdc# ls
USB_INSTALLATION.txt  boot/  lost+found/  porteus/
root@porteus:/mnt/sdc# cd porteus
root@porteus:/mnt/sdc/porteus# ls
base/     make_iso.sh  optional/              rootcopy/
changes/  modules/     porteus-v3.2-i586.sgn
root@porteus:/mnt/sdc/porteus# cd modules
root@porteus:/mnt/sdc/porteus/modules# ^C
root@porteus:/mnt/sdc/porteus/modules# ls
root@porteus:/mnt/sdc/porteus/modules# ls
root@porteus:/mnt/sdc/porteus/modules# 

The output of this would be interesting to see.

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guest@porteus:~$ echo $PORTDIR

[donald]

@ Ed

But there is no partition number in these ls sdc commands

OK..
One can create such kind of devices if you dd an iso onto a thumb drive, for example,
(who does this?..and for what reason?), it would be read only then.
e.g.

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guest@porteus:~$ cat /proc/mounts
/dev/sdb /mnt/sdb iso9660 ro,noatime,nodiratime 0 0

which would result in

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guest@porteus:~$ cd /mnt
guest@porteus:/mnt$ ls
live/  sda1/  sda2/  sda3/  sdb/
guest@porteus:/mnt$ cd sdb
guest@porteus:/mnt/sdb$ ls
USB_INSTALLATION.txt  boot/  porteus/
guest@porteus:/mnt/sdb$ cd porteus
guest@porteus:/mnt/sdb/porteus$ ls
base/  make_iso.sh*  modules/  optional/  porteus-v3.2-i586.sgn  rootcopy/
guest@porteus:/mnt/sdb/porteus$ cd modules
guest@porteus:/mnt/sdb/porteus/modules$ ls
guest@porteus:/mnt/sdb/porteus/modules$ 

[movobojo]

Of course not.....sdc is a drive, not a partition --> sdc1 or whatever

But there is no partition number in these ls sdc commands.

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guest@porteus:~$ su
Password: 
root@porteus:/home/guest# cd ..
root@porteus:/home# cd ..
root@porteus:/# ls
bin/  etc/   lib/    mnt/  proc/  run/   srv/  tmp/  var/
dev/  home/  media/  opt/  root/  sbin/  sys/  usr/
root@porteus:/# cd mnt
root@porteus:/mnt# ls
live/  sda1/  sda2/  sda3/  sdb1/  sdc/
root@porteus:/mnt# cd sdc
root@porteus:/mnt/sdc# ls
USB_INSTALLATION.txt  boot/  lost+found/  porteus/
root@porteus:/mnt/sdc# cd porteus
root@porteus:/mnt/sdc/porteus# ls
base/     make_iso.sh  optional/              rootcopy/
changes/  modules/     porteus-v3.2-i586.sgn
root@porteus:/mnt/sdc/porteus# cd modules
root@porteus:/mnt/sdc/porteus/modules# ^C
root@porteus:/mnt/sdc/porteus/modules# ls
root@porteus:/mnt/sdc/porteus/modules# ls
root@porteus:/mnt/sdc/porteus/modules# 

The output of this would be interesting to see.

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guest@porteus:~$ echo $PORTDIR

Here you are:

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guest@porteus:~$ echo $PORTDIR
/mnt/sdb/porteus
guest@porteus:~$ 

So is it interesting?

[Ed_P]

Here you are:

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guest@porteus:~$ echo $PORTDIR
/mnt/sdb/porteus
guest@porteus:~$ 

So is it interesting?

Very much so!! It appears that we're talking about two different drives! What you are looking for and what you are running on are not the same drive. Also interesting to note that there is no partition number after sdb either.

I think we should wait for donald's input.