To check Disk Space On Linux and Unix operating systems, you can use the df command to get a detailed report on the system’s disk space usage.
df -h
The output
Filesystem Size Used Avail Capacity iused ifree %iused Mounted on
/dev/disk3s1s1 926Gi 20Gi 803Gi 3% 502068 4293294021 0% /
devfs 205Ki 205Ki 0Bi 100% 710 0 100% /dev
/dev/disk3s6 926Gi 7.0Gi 803Gi 1% 7 8418661400 0% /System/Volumes/VM
/dev/disk3s2 926Gi 857Mi 803Gi 1% 1811 8418661400 0% /System/Volumes/Preboot
/dev/disk3s4 926Gi 623Mi 803Gi 1% 267 8418661400 0% /System/Volumes/Update
/dev/disk1s2 500Mi 6.0Mi 480Mi 2% 1 4910360 0% /System/Volumes/xarts
/dev/disk1s1 500Mi 7.4Mi 480Mi 2% 31 4910360 0% /System/Volumes/iSCPreboot
/dev/disk1s3 500Mi 2.4Mi 480Mi 1% 49 4910360 0% /System/Volumes/Hardware
/dev/disk3s5 926Gi 93Gi 803Gi 11% 1154868 8418661400 0% /System/Volumes/Data
map auto_home 0Bi 0Bi 0Bi 100% 0 0 100% /System/Volumes/Data/home
/dev/disk2s1 5.0Gi 1.6Gi 3.4Gi 32% 58 35784400 0% /System/Volumes/Update/SFR/mnt1
/dev/disk3s1 926Gi 20Gi 803Gi 3% 502130 4293208963 0% /System/Volumes/Update/mnt1
We can convert this table into json with jq
disk_report=($(df -h | tr -s ' ' | jq -c -Rn 'input | split(" ") as $head | inputs | split(" ") | to_entries | map(.key = $head[.key]) | from_entries'))
echo $disk_report | jq
The output
{
"Filesystem": "/dev/disk3s1s1",
"Size": "926Gi",
"Used": "20Gi",
"Avail": "803Gi",
"Capacity": "3%",
"iused": "502068",
"ifree": "4293294021",
"%iused": "0%",
"Mounted": "/"
}
{
"Filesystem": "devfs",
"Size": "205Ki",
"Used": "205Ki",
"Avail": "0Bi",
"Capacity": "100%",
"iused": "710",
"ifree": "0",
"%iused": "100%",
"Mounted": "/dev"
}
{
"Filesystem": "/dev/disk3s6",
"Size": "926Gi",
"Used": "7.0Gi",
"Avail": "803Gi",
"Capacity": "1%",
"iused": "7",
"ifree": "8418536520",
"%iused": "0%",
"Mounted": "/System/Volumes/VM"
}
{
"Filesystem": "/dev/disk3s2",
"Size": "926Gi",
"Used": "857Mi",
"Avail": "803Gi",
"Capacity": "1%",
"iused": "1811",
"ifree": "8418536520",
"%iused": "0%",
"Mounted": "/System/Volumes/Preboot"
}
{
"Filesystem": "/dev/disk3s4",
"Size": "926Gi",
"Used": "623Mi",
"Avail": "803Gi",
"Capacity": "1%",
"iused": "267",
"ifree": "8418536520",
"%iused": "0%",
"Mounted": "/System/Volumes/Update"
}
{
"Filesystem": "/dev/disk1s2",
"Size": "500Mi",
"Used": "6.0Mi",
"Avail": "480Mi",
"Capacity": "2%",
"iused": "1",
"ifree": "4910360",
"%iused": "0%",
"Mounted": "/System/Volumes/xarts"
}
{
"Filesystem": "/dev/disk1s1",
"Size": "500Mi",
"Used": "7.4Mi",
"Avail": "480Mi",
"Capacity": "2%",
"iused": "31",
"ifree": "4910360",
"%iused": "0%",
"Mounted": "/System/Volumes/iSCPreboot"
}
{
"Filesystem": "/dev/disk1s3",
"Size": "500Mi",
"Used": "2.4Mi",
"Avail": "480Mi",
"Capacity": "1%",
"iused": "49",
"ifree": "4910360",
"%iused": "0%",
"Mounted": "/System/Volumes/Hardware"
}
{
"Filesystem": "/dev/disk3s5",
"Size": "926Gi",
"Used": "93Gi",
"Avail": "803Gi",
"Capacity": "11%",
"iused": "1155057",
"ifree": "8418536520",
"%iused": "0%",
"Mounted": "/System/Volumes/Data"
}
{
"Filesystem": "map",
"Size": "auto_home",
"Used": "0Bi",
"Avail": "0Bi",
"Capacity": "0Bi",
"iused": "100%",
"ifree": "0",
"%iused": "0",
"Mounted": "100%",
"on": "/System/Volumes/Data/home"
}
{
"Filesystem": "/dev/disk2s1",
"Size": "5.0Gi",
"Used": "1.6Gi",
"Avail": "3.4Gi",
"Capacity": "32%",
"iused": "58",
"ifree": "35784400",
"%iused": "0%",
"Mounted": "/System/Volumes/Update/SFR/mnt1"
}
{
"Filesystem": "/dev/disk3s1",
"Size": "926Gi",
"Used": "20Gi",
"Avail": "803Gi",
"Capacity": "3%",
"iused": "502130",
"ifree": "4293208963",
"%iused": "0%",
"Mounted": "/System/Volumes/Update/mnt1"
}
echo $disk_report | jq '.Filesystem'
"/dev/disk3s1s1"
"devfs"
"/dev/disk3s6"
"/dev/disk3s2"
"/dev/disk3s4"
"/dev/disk1s2"
"/dev/disk1s1"
"/dev/disk1s3"
"/dev/disk3s5"
"map"
"/dev/disk2s1"
"/dev/disk3s1"