Awk value greater than 40

Question

Can someone please help me. I'm trying to get values greater than 40, but when it's at 100 it doesn't get it.

[root@localhost home]# df -Pk --block-size=1M

Filesystem            1048576-blocks  Used Available Capacity Mounted on

/dev/mapper/rhel-root          22510 13135      9375      59% /

devtmpfs                         905     0       905       0% /dev

tmpfs                            920     1       920       1% /dev/shm

tmpfs                            920     9       911       1% /run

tmpfs                            920     0       920       0% /sys/fs/cgroup

/dev/sda1                       1014   178       837      18% /boot

Linux_DB2                     240879 96794    144086      41% /media/sf_Linux_DB2

tmpfs                            184     1       184       1% /run/user/42

tmpfs                            184     1       184       1% /run/user/0

*/dev/sr0                          56    56         0     100% /run/media/root/VBox_GAs_5.2.20*

[root@localhost home]# df -Pk --block-size=1M | awk '$5 > 40'

Filesystem            1048576-blocks  Used Available Capacity Mounted on

/dev/mapper/rhel-root          22510 13135      9375      59% /

Linux_DB2                     240879 96794    144086      41% /media/sf_Linux_DB2

The /dev/sr0 56 56 0 100% /run/media/root/VBox_GAs_5.2.20 doesn't come out.

Answer 1

Could you please try following once.

df -hP | awk '$5+0>40'

Explanation: Since 5th field of disk usage is having string with digits added, so by adding a zero +0 with $5 it tells awk to keep only digits in comparison and it will NOT have strings in it. Then this condition will considered like digits are getting compared, will show the right output then. Here -P option with df command is also crucial since it gives the output of df in a single line and it makes awk command's life easy to get its calculations done.