I find the UT Linux structure both interesting and odd
Hello. I was pleased to discover that some Ubuntu APT packages can be installed and run on the command line. I have installed a few small command line programs, via using the command "sudo mount -o rw,remount /" (as described in the instructions on setting up Anbox, and then returning the system back to "sudo mount -o ro,remount /".
But I noticed that this is surprisingly limited. I began gettng the error, "E: You don't have enough free space in /var/cache/apt/archives/." So, I attempted to clear space with "apt autoclean" and "apt clean", but to no avail.
Then, I checked out the directory "/var/cache/apt/archives/", and there doesn't seem to be anything in it. I'm not even sure that this directory exists. It seems to be a phantom directory, residing at "/dev/loop0":
blet@ubuntu-phablet:~$ df -hT Filesystem Type Size Used Avail Use% Mounted on udev devtmpfs 766M 4.0K 766M 1% /dev tmpfs tmpfs 186M 1.7M 184M 1% /run /dev/mmcblk0p28 ext4 13G 3.8G 8.3G 32% /userdata /dev/loop0 ext2 2.0G 1.9G 0 100% / /dev/loop1 ext4 110M 106M 4.3M 97% /android/system none tmpfs 4.0K 0 4.0K 0% /android tmpfs tmpfs 929M 4.0K 929M 1% /etc/fstab tmpfs tmpfs 929M 1.1M 928M 1% /var/lib/lxc/android/rootfs /dev/disk/by-partlabel/cache ext4 690M 13M 678M 2% /android/cache /dev/disk/by-partlabel/persist ext4 16M 4.2M 12M 27% /android/persist /dev/disk/by-partlabel/modem vfat 64M 45M 20M 70% /android/firmware none tmpfs 4.0K 0 4.0K 0% /sys/fs/cgroup tmpfs tmpfs 929M 1.0M 928M 1% /tmp none tmpfs 5.0M 0 5.0M 0% /run/lock none tmpfs 929M 228K 928M 1% /run/shm none tmpfs 100M 0 100M 0% /run/user cgmfs tmpfs 100K 0 100K 0% /run/cgmanager/fs tmpfs tmpfs 929M 0 929M 0% /media tmpfs tmpfs 929M 0 929M 0% /var/lib/openvpn/chroot/tmp tmpfs tmpfs 929M 0 929M 0% /var/lib/sudo tmpfs tmpfs 186M 0 186M 0% /run/user/0 tmpfs tmpfs 186M 36K 186M 1% /run/user/32011 tmpfs tmpfs 186M 0 186M 0% /run/user/65534 phablet@ubuntu-phablet:~$ sudo du -hsc /var/cache [sudo] password for phablet: 73M /var/cache 73M total phablet@ubuntu-phablet:~$ df -hT /var/cache Filesystem Type Size Used Avail Use% Mounted on /dev/loop0 ext2 2.0G 1.9G 0 100% / phablet@ubuntu-phablet:~$ ls /dev/loop0 /dev/loop0 phablet@ubuntu-phablet:~$ ls -l /dev/loop0 brw-rw---- 1 root disk 7, 0 Dec 7 19:10 /dev/loop0 phablet@ubuntu-phablet:~$ ls /var/cache/apt/archives/ lock partial phablet@ubuntu-phablet:~$ ls -l /var/cache/apt/archives/ total 4 -rw-r----- 1 root root 0 Dec 7 18:04 lock drwx------ 2 root root 4096 Dec 7 18:49 partial phablet@ubuntu-phablet:~$ cd /var/cache/apt/archives/ phablet@ubuntu-phablet:/var/cache/apt/archives$ cd partial\ > bash: cd: partial: Permission denied phablet@ubuntu-phablet:/var/cache/apt/archives$ cd partial bash: cd: partial: Permission denied phablet@ubuntu-phablet:/var/cache/apt/archives$ phablet@ubuntu-phablet:/var/cache/apt/archives$ sudo du -hsc /var/cache/apt/archives 8.0K /var/cache/apt/archives 8.0K total phablet@ubuntu-phablet:/var/cache/apt/archives$ sudo du -hsc /var/cache/apt/ 65M /var/cache/apt/ 65M total phablet@ubuntu-phablet:/var/cache/apt/archives$ cd .. phablet@ubuntu-phablet:/var/cache/apt$ ls archives pkgcache.bin srcpkgcache.bin phablet@ubuntu-phablet:/var/cache/apt$ ls -l total 65788 drwxr-xr-x 3 root root 4096 Dec 7 18:49 archives -rw-r--r-- 1 root root 33659744 Dec 8 02:59 pkgcache.bin -rw-r--r-- 1 root root 33618288 Dec 8 02:59 srcpkgcache.bin phablet@ubuntu-phablet:/var/cache/apt$
/var/cache doesn't seem to have a huge amount in it. And /var/cache/apt/archives has practically nothing in it. 8.0K is too much disk usage? Leading to a not enough space error? I think not.
Though /dev/loop0, which the df command cited when I asked about /var/cache/apt/archives, says it has no space. I'm not sure what /dev/loop0 actually is, though. It's not a directory. Strange.
The rootfs is readonly for a reason. So apt is not a supported method of installing packages. If there are CLI or legacy apps you need to run on the phone, the supported method of doing this is through a libertine container.
The rootfs is an image file, and so it is loopback mounted.
The Libertine container didn't work with commandline programs. I'm guessing the Libertine container is more for the convergence aspect of UT.
I am not sure what didn't work for you concerning command line programs in Libertine. The UBports documentation mentions that doing so is possible and has a cool trick to make the experience more seamless.
For a more step by step description of the process you could go here.
Lastly, the purpose of a Libertine container is to offer the possibility to install programs from the Ubuntu archives in a 'traditional' way, i.e. via apt. But that does not directly contribute to the 'convergence aspect' of UT. Now convergence means different things to different people, but at the very least it would include the idea that applications are built with a UI to adapt to different form factors. In the case of Libertine, all it does is allow you to install applications from the repositories. Most, if not all, of these programs have not been written with different form factors in mind, so by definition they would not be convergent.
@arubislander I've been trying to follow your advice, but without luck. I set up a Libertine container, and tried to install a few command line programs (both via the GUI on the phone and on the command line) and neither has worked. From the command line, here is what I get when I try to install a simple command line calendar (and note, I have installed calcurse successfully in the past using apt --> in a previous setup of Ubuntu Touch, though not on this setup of it):
phablet@ubuntu-phablet:~$ libertine-container-manager install-package -p calcurse Err:1 http://ports.ubuntu.com/ubuntu-ports xenial InRelease Temporary failure resolving 'ports.ubuntu.com' Err:2 https://repo.ubports.com xenial InRelease Could not resolve host: repo.ubports.com Err:3 http://ports.ubuntu.com/ubuntu-ports xenial-updates InRelease Temporary failure resolving 'ports.ubuntu.com' Reading package lists... W: Failed to fetch http://ports.ubuntu.com/ubuntu-ports/dists/xenial/InRelease Temporary failure resolving 'ports.ubuntu.com' W: Failed to fetch http://ports.ubuntu.com/ubuntu-ports/dists/xenial-updates/InRelease Temporary failure resolving 'ports.ubuntu.com' W: Failed to fetch https://repo.ubports.com/dists/xenial/InRelease Could not resolve host: repo.ubports.com W: Some index files failed to download. They have been ignored, or old ones used instead. Reading package lists... Building dependency tree... Reading state information... The following package was automatically installed and is no longer required: libpcre16-3 Use 'sudo apt autoremove' to remove it. The following NEW packages will be installed: calcurse 0 upgraded, 1 newly installed, 0 to remove and 1 not upgraded. Need to get 193 kB of archives. After this operation, 746 kB of additional disk space will be used. Err:1 http://ports.ubuntu.com/ubuntu-ports xenial/universe armhf calcurse armhf 4.0.0-1 Temporary failure resolving 'ports.ubuntu.com' E: Failed to fetch http://ports.ubuntu.com/ubuntu-ports/pool/universe/c/calcurse/calcurse_4.0.0-1_armhf.deb Temporary failure resolving 'ports.ubuntu.com' E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing? Reading package lists... Building dependency tree... Reading state information... The following package was automatically installed and is no longer required: libpcre16-3 Use 'sudo apt autoremove' to remove it. 0 upgraded, 0 newly installed, 0 to remove and 1 not upgraded. libertine-container-manager:184: ERROR: install_package(): Package 'calcurse' failed to install in container 'xenial' phablet@ubuntu-phablet:~$ phablet@ubuntu-phablet:~$ libertine-launch -i xenial calcurse proot error: 'calcurse' not found (root = /home/phablet/.cache/libertine-container/xenial/rootfs, cwd = /home/phablet, $PATH=/home/phablet/bin:/home/phablet/.local/bin:/home/phablet/bin:/home/phablet/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin:/usr/games) fatal error: see `proot --help`. phablet@ubuntu-phablet:~$
So, I'm not sure what I'm doing wrong.
Temporary failure resolving 'ports.ubuntu.com'
Just to geht the obvious out of the way: You are connected to the internet, right?
Is your UT up to date? I remember some libertine fixes a while ago.
Lastly, if you are connected and up to date, maybe something is off with your container. Could you try with a new one?
Just to geht the obvious out of the way: You are connected to the internet, right?
My WiFi was on, but my data was turned off. I've discovered that with UT, connecting to the internet via WiFi alone doesn't seem to work now (at least on my phone at present). By comparison, on my old Galaxy Nexus, running LineageOS 13, which now has no SIM card (and I intentionally turned off the cell data), it can still access the internet via WiFi.
To add, my phone has been acting rather unusual lately. I restarted it and now the contacts are wiped out. I tried re-importing the contacts.vcf file, but was unable to.  Well, I think there were just some cobwebs in the phone. I solidly turned it off and on a couple of times (rather than merely restarting it), and now things seem more back to normal (at least my contacts have returned). I'll try again with Libertine and see.
@doniks, Okay, time for attempt #2. First, cellular data is off, but WiFi is on, so there is internet access. And the system is up to date.... okay, great, it worked this time. Thanks for your help.
@MarkG_108 - Libertine works fine with command line programs - I have used youtube-dl and screenfetch successfully on my OnePlus One in fact. You just need to run the