Dealing with filesytems resizing

filesystems-resizing.sh

# 1 - Report file system disk space usage
# note: -h: human readable. print sizes in power of 1024. 

$ df -h 

# would print:
# Filesystem      Size  Used Avail Use% Mounted on
# udev            7.7G     0  7.7G   0% /dev
# tmpfs           1.6G  9.0M  1.6G   1% /run
# /dev/nvma1n1p1   59G   34G   25G  59% /
# tmpfs           7.7G     0  7.7G   0% /dev/shm
# tmpfs           5.0M     0  5.0M   0% /run/lock
# tmpfs           7.7G     0  7.7G   0% /sys/fs/cgroup

# 2 - List block devices

$ lsblk

# NAME        MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
# nvma1n1     259:0    0  75G  0 disk
# └─nvma1n1p1 259:1    0  75G  0 part /

# 3 - List the filesystems type 

$ df -Th

# Filesystem     Type      Size  Used Avail Use% Mounted on
# udev           devtmpfs  7.7G     0  7.7G   0% /dev
# tmpfs          tmpfs     1.6G  9.0M  1.6G   1% /run
# /dev/nvma1n1p1 ext4       59G   34G   25G  59% /
# tmpfs          tmpfs     7.7G     0  7.7G   0% /dev/shm
# tmpfs          tmpfs     5.0M     0  5.0M   0% /run/lock
# tmpfs          tmpfs     7.7G     0  7.7G   0% /sys/fs/cgroup
# tmpfs          tmpfs     1.6G     0  1.6G   0% /run/user/1000


# 4 - Expand the partition size
$ sudo growpart /dev/nvma1n1 1

# 5 - Resizing ext4 filesystems 

$ sudo resize2fs /dev/nvma1n1p1

# Filesystem at /dev/nvma1n1p1 is mounted on /; on-line resizing required
# old_desc_blocks = 4, new_desc_blocks = 5
# The filesystem on /dev/nvma1n1p1 is now 19660539 (4k) blocks long.

# 6 - Confirm the resizing 

$ df -h 

# Filesystem      Size  Used Avail Use% Mounted on
# udev            7.7G     0  7.7G   0% /dev
# tmpfs           1.6G  9.0M  1.6G   1% /run
# /dev/nvma1n1p1   73G   34G   39G  47% /
# tmpfs           7.7G     0  7.7G   0% /dev/shm
# tmpfs           5.0M     0  5.0M   0% /run/lock
# tmpfs           7.7G     0  7.7G   0% /sys/fs/cgroup
# tmpfs           1.6G     0  1.6G   0% /run/user/1000