# Filesystem ## Filesystem > In computing, a file system (or filesystem) is used to control how data is stored and retrieved. Without a file system, information placed in a storage area would be one large body of data with no way to tell where one piece of information stops and the next begins. By separating the data into pieces and giving each piece a name, the information is easily isolated and identified. Taking its name from the way paper-based information systems are named, each group of data is called a "file". The structure and logic rules used to manage the groups of information and their names is called a "file system". [Wikipedia](https://en.wikipedia.org/wiki/File_system) ## File System Type ### Release v3.5 Yocto ```bash root@edison:~# df -h Filesystem Size Used Avail Use% Mounted on /dev/root 1.4G 1017M 312M 77% / devtmpfs 480M 0 480M 0% /dev tmpfs 481M 0 481M 0% /dev/shm tmpfs 481M 588K 480M 1% /run tmpfs 481M 0 481M 0% /sys/fs/cgroup tmpfs 481M 4.0K 481M 1% /tmp /dev/mmcblk0p10 1.3G 2.1M 1.3G 1% /home tmpfs 481M 6.1M 474M 2% /var/volatile /dev/mmcblk0p5 1003K 19K 913K 3% /factory tmpfs 97M 0 97M 0% /run/user/0 /dev/loop0 767M 4.0K 767M 1% /media/storage root@edison:~# ``` ### Release v3.0 Yocto ```bash root@edison:~# df -h Filesystem Type 1K-blocks Used Available Use% Mounted on /dev/root ext4 1444528 1125392 228656 84% / devtmpfs devtmpfs 491264 0 491264 0% /dev tmpfs tmpfs 491548 0 491548 0% /dev/shm tmpfs tmpfs 491548 588 490960 1% /run tmpfs tmpfs 491548 0 491548 0% /sys/fs/cgroup tmpfs tmpfs 491548 3108 488440 1% /tmp /dev/mmcblk0p10 ext4 1337936 17368 1304184 2% /home tmpfs tmpfs 491548 6164 485384 2% /var/volatile /dev/mmcblk0p5 ext4 1003 19 913 3% /factory tmpfs tmpfs 98312 0 98312 0% /run/user/0 /dev/loop0 vfat 784872 4 784868 1% /media/storage ``` ```bash root@edison:~# mount /dev/mmcblk0p8 on / type ext4 (rw,nodev,noatime,discard,noauto_da_alloc,data=ordered) devtmpfs on /dev type devtmpfs (rw,relatime,size=491264k,nr_inodes=122816,mode=755) proc on /proc type proc (rw,relatime) sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime) tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev) devpts on /dev/pts type devpts (rw,relatime,gid=5,mode=620) tmpfs on /run type tmpfs (rw,nosuid,nodev,mode=755) tmpfs on /sys/fs/cgroup type tmpfs (ro,nosuid,nodev,noexec,mode=755) cgroup on /sys/fs/cgroup/systemd type cgroup (rw,nosuid,nodev,noexec,relatime,xattr,release_agent=/lib) pstore on /sys/fs/pstore type pstore (rw,nosuid,nodev,noexec,relatime) cgroup on /sys/fs/cgroup/cpuset type cgroup (rw,nosuid,nodev,noexec,relatime,cpuset) cgroup on /sys/fs/cgroup/cpu,cpuacct type cgroup (rw,nosuid,nodev,noexec,relatime,cpuacct,cpu) cgroup on /sys/fs/cgroup/devices type cgroup (rw,nosuid,nodev,noexec,relatime,devices) cgroup on /sys/fs/cgroup/freezer type cgroup (rw,nosuid,nodev,noexec,relatime,freezer) cgroup on /sys/fs/cgroup/blkio type cgroup (rw,nosuid,nodev,noexec,relatime,blkio) cgroup on /sys/fs/cgroup/perf_event type cgroup (rw,nosuid,nodev,noexec,relatime,perf_event) systemd-1 on /boot type autofs (rw,relatime,fd=22,pgrp=1,timeout=300,minproto=5,maxproto=5,direct) tmpfs on /tmp type tmpfs (rw) mqueue on /dev/mqueue type mqueue (rw,relatime) debugfs on /sys/kernel/debug type debugfs (rw,relatime) systemd-1 on /home type autofs (rw,relatime,fd=31,pgrp=1,timeout=300,minproto=5,maxproto=5,direct) tmpfs on /var/volatile type tmpfs (rw,relatime) fusectl on /sys/fs/fuse/connections type fusectl (rw,relatime) configfs on /sys/kernel/config type configfs (rw,relatime) /dev/mmcblk0p5 on /factory type ext4 (ro,nosuid,nodev,noatime,discard,noauto_da_alloc) /dev/mmcblk0p10 on /home type ext4 (rw,nosuid,nodev,noatime,discard,noauto_da_alloc,data=ordered) tmpfs on /run/user/0 type tmpfs (rw,nosuid,nodev,relatime,size=98312k,mode=700) /dev/mmcblk0p9 on /media/storage type vfat (ro,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=i) ``` ## File System Disk Space Usage ### Release v3.5 Yocto, Fresh Installation ```bash root@edison:~# df -h Filesystem Size Used Avail Use% Mounted on /dev/root 1.4G 1017M 312M 77% / devtmpfs 480M 0 480M 0% /dev tmpfs 481M 0 481M 0% /dev/shm tmpfs 481M 588K 480M 1% /run tmpfs 481M 0 481M 0% /sys/fs/cgroup tmpfs 481M 4.0K 481M 1% /tmp /dev/mmcblk0p10 1.3G 2.1M 1.3G 1% /home tmpfs 481M 6.1M 474M 2% /var/volatile /dev/mmcblk0p5 1003K 19K 913K 3% /factory tmpfs 97M 0 97M 0% /run/user/0 /dev/loop0 767M 4.0K 767M 1% /media/storage root@edison:~# ``` ### Release v3.0 Yocto, Fresh Installation ```bash root@edison:~# df -h Filesystem Size Used Avail Use% Mounted on /dev/root 1.4G 958M 365M 73% / devtmpfs 480M 0 480M 0% /dev tmpfs 481M 0 481M 0% /dev/shm tmpfs 481M 592K 480M 1% /run tmpfs 481M 0 481M 0% /sys/fs/cgroup tmpfs 481M 42M 439M 9% /tmp tmpfs 481M 6.1M 475M 2% /var/volatile tmpfs 97M 0 97M 0% /run/user/0 /dev/loop0 767M 4.0K 767M 1% /media/storage /dev/mmcblk0p10 1.3G 2.1M 1.3G 1% /home /dev/mmcblk0p5 1003K 19K 913K 3% /factory ``` ### Release v2.1 Yocto, Fresh Installation ```bash root@edison:~# df -h Filesystem Size Used Available Use% Mounted on /dev/root 1.4G 428.6M 934.8M 31% / devtmpfs 479.8M 0 479.8M 0% /dev tmpfs 480.1M 0 480.1M 0% /dev/shm tmpfs 480.1M 528.0K 479.5M 0% /run tmpfs 480.1M 0 480.1M 0% /sys/fs/cgroup tmpfs 480.1M 4.0K 480.1M 0% /tmp systemd-1 5.8M 5.3M 456.0K 92% /boot tmpfs 480.1M 0 480.1M 0% /var/volatile /dev/mmcblk0p7 5.8M 5.3M 456.0K 92% /boot /dev/mmcblk0p10 1.3G 2.0M 1.3G 0% /home /dev/mmcblk0p5 1003.0K 19.0K 913.0K 2% /factory ``` ### Ubilinux, Fresh Installation ```bash edison@ubilinux:~$ df -h Filesystem Size Used Avail Use% Mounted on rootfs 1.4G 812M 504M 62% / /dev/root 1.4G 812M 504M 62% / devtmpfs 480M 0 480M 0% /dev tmpfs 97M 292K 96M 1% /run tmpfs 5.0M 0 5.0M 0% /run/lock tmpfs 193M 0 193M 0% /run/shm tmpfs 481M 0 481M 0% /tmp /dev/mmcblk0p7 32M 5.3M 27M 17% /boot /dev/mmcblk0p10 1.3G 2.0M 1.3G 1% /home ``` ## File System Disk Space Free Up ```bash root@edison:~# mv /var/cache /home root@edison:~# cd /var root@edison:~# ln -sf /home/cache cache root@edison:~# mv /usr/share /home root@edison:~# cd /usr root@edison:~# ln -sf /home/share share ``` * [Get additional 800 MB disk space](http://www.helios.de/heliosapp/edison/) ## File System Disk Space uSD ToDo * [How to boot Edison from an SD card (Linux)](https://communities.intel.com/thread/61048?tstart=0) ## File System Disk Space Encryption ToDo --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. 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