I installed Linux mint on my 64gb flashdrive using Rufus, with the default settings according to this guide (ubuntu.com/download/desktop/create-a-usb-stick-on-windows). When I boot into mint, the file manager tells me I only have 6gb of free space, but GParted tells me there is 56gb of free space on the flashdrive (imgur.com/LGi60VA). Why isn't this 56gb available for me to use? Is it reserved for the system and program installs? If so, is there a way for me to change the allocation so I can use it as a user? Sorry if there aren't enough details, quite new to this

I was told these commands would be useful but I'm not sure what they mean.

mint@mint ~ $ df
Filesystem     1K-blocks    Used Available Use% Mounted on
udev             6075532       0   6075532   0% /dev
tmpfs            1217992    9544   1208448   1% /run
/dev/sda1       60637696 1667360  58970336   3% /cdrom
/dev/loop0       1608832 1608832         0 100% /rofs
/cow             6089944   35120   6054824   1% /
tmpfs            6089944     860   6089084   1% /dev/shm
tmpfs               5120       8      5112   1% /run/lock
tmpfs            6089944       0   6089944   0% /sys/fs/cgroup
tmpfs            6089944       4   6089940   1% /tmp
cgmfs                100       0       100   0% /run/cgmanager/fs
tmpfs            1217992      24   1217968   1% /run/user/999
mint@mint ~ $ sudo lsblk -f
NAME   FSTYPE   LABEL      UUID                                     MOUNTPOINT
└─sda1 vfat     LINUX MINT 1EE4-0C57                            /cdrom
loop0  squashfs                                                 /rofs
mint@mint ~ $ sudo lsblk -m
sda    57.9G root  disk  brw-rw----
└─sda1 57.9G root  disk  brw-rw----
sr0    1024M root  cdrom b
  • clearly there's more than 50G free space. you need to post a screenshot of message from the file manager. Nov 28 '16 at 3:19

This line essentially indicates that you've booted a LiveCD/LiveDVD:

/cow             6089944   35120   6054824   1% /

You have space available, it's under /cdrom, where /dev/sda1 ended up being mounted.

The 6GB free space is just a tmpfs overlay on top of the read-only system-bearing squashfs. Be careful! Whatever you write that isn't under /cdrom will be lost when you reboot. Why 6GB? By default, tmpfs is sized to half of your RAM, so I'm guessing you have about 12GB of system memory.

Also, you might not be able to write files in /cdrom either if Mint has mounted it read-only. You should be able to remount it read-write though, assuming it is actually vfat as it appears to be in the partition table.

  • So sorry for the delayed response, I installed mint directly on the flashdrive the problem went away and I forgot I asked this. However, I am interested in making another bootable stick now, so I'm wondering: why does file manager display tmpfs space rather than /cdrom space? i actually met the problem while trying to sync dropbox, so does it show that my programs are installed on tmpfs? if so, how come the folders are still there after I reboot? Also, is this in any way related to persistence? Because i read the maximum value for persistance is 8gb, which would explain the 6gb.
    – cobaltB12
    Jan 14 '17 at 9:56
  • Folders under /tmp should not be there after a reboot. Your programs are not installed on tmpfs. Jan 15 '17 at 18:14

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