7/21/2019 RHEL 567 Commands Cheatsheet

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https://access.redhat.com/solutions/737373

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FILE SYSTEMS, VOLUMES, AND DISKS

TASK RHEL

Default le system

ext3

ext4

xfs

Defragment disk space

copy data to new le system

fsck (look for non-contiguous inodes)

copy data to new le systemfsck (look for non-contiguous inodes)

xfs_fsr

Create/modify disk partitions

fdisk

parted

fdisk

gdisk

parted

ssm create

Format disk partition

mkfs.lesystem_type (ext4, xfs)

mkswap

mkfs.lesystem_type (ext4, xfs)

mkswap

ssm create

Mount storage

mount

/etc/fstab

mount

/etc/fstab

ssm mount

Create physical volume

pvcreate

pvcreate

ssm create (if backend is lvm)

Create volume group

vgcreate

vgcreatessm create (if backend is lvm)

Create logical volume

lvcreate

lvcreate

ssm create (if backend is lvm)

Enlarge volumes formatted withdefault le system

vgextend

lvextend

resize2fs

vgextend

lvextend

xfs_growfs

ssm resize

Shrink volumes formatted withdefault le system

resize2fslvreduce

vgreduce

XFS cannot currently be shrunk; copy desired data to

a smaller le system.

Check/repair le system

fsck

fsck

ssm check

Congure NFS share

/etc/exports

service nfs reload

/etc/exports

systemctl reload nfs.service

Mount and activate swap/etc/fstab

swapon -a

Congure static mounts /etc/fstab

View free disk space df

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