RHCE (REDHAT7) (ii)

RHCE (REDHAT7) (ii)

The hard disk is in sector,1 sector is 512b (6 and below in cylinder,1 cylinder is about 8M)

The partition format for XFS supports up to 500T (6 and below partition formats of Ext4, up to 50T support)

Fdisk MBR Partitioning method

Gdisk GPT Partitioning method

Parted Advanced partitioning operations (create, copy, resize partitions, etc.)

Partprobe Refresh partition table (or restart server)

Fdisk-l

Fdisk/dev/sdb (n new,p print,d Delete,w save,t change type)

+10g Specify a partition size of 10G

MKFS.XFS MKFS.EXT4

Mkfs.xfs-f (xfs multiple times need to add -f)

Xfs-admin-l Opt/dev/sda3 (xfs partition Tag)

A2label/dev/sda5 "Backup" (ext4 partition Tag)

Blkid/dev/sda3 viewing device UUID

DF/ (in bytes)

Df-h/ (in M,G )

Df-ht/ (T denotes partition type, e.g.XFS)

Du. (Statistics current directory file size, bytes)

Du-sh. (Statistics the file size in the current directory, M,G)

Baobab Bring up graphics hard disk space analysis tool

/etc/fstab mount the device to the system save file

Mount-a is /etc/fstab file in effect

Mount-o mount with specific options

Defaults including Rw,suid,dev,exec,async

Umount Uninstall

LSOF/AA (can see who is using, process number)

Mount-o REMOUNT,RO/RW/AA

Mount-o REMOUNT,NOEXEC/AA

Mount10.0.0.2:/var/mnt (Mount NFS share)

Mount--bind/opt/mnt/opt Mount a directory to another directory (camouflage)

Mkswap/dev/sda6 increase swap space

Swapon-a activating swap space

Swapon-s View activated swap

Swapoff/dev/sda6 closing the swap partition

Swapon-p5/dev/sda6 set swap priority

Ls-i

Ln-s (file type will be displayed as "L")

Ls-l (- general file,D directory,l Link,B- block device, C- character device,P- named pipe,s Sockets)

/run/root/media Disc Default path

Acl

Getfacl

Setfacl

Setfacl-m o:r/tmp/aa.log (set other accounts to have read access to/tmp/aa.log)

Setfacl-x u:aa/tmp/aa.log (remove user AA for /tmp/aa.log file ACL)

Setfacl-b/tmp/aa.log (remove all ACLs)

Getfacl/tmp/aa.log viewing ACLs

Setfacl-m u:aa:rwx/tmp/aa.log (set user AA to /tmp/aa.log have read and write execution permissions)

ACL information is not inherited by default (to inherit the Mask setting)

Setfacl-m D:U:AA:RWX/AA (Effective range is below directory, no effect on directory)

Setfacl-m u:aa:rwx/aa/

Mount | grep home View Mount of home partition (e.g. mount source, partition format, etc.)

XFS Partition Set space quotas

you must first Defaults,usrquota,grpquota the/etc/fstab/home partition and then restart the server (otherwise it will be reported Xfs_quota:cannotset Limits function not implemented error)

# xfs_quota–x–c "Limit bsoft=30g bhard=40g AA"/Home

# xfs_quota–x–c Report/home

Local Database directory for /var/lib/rpm rpm

Rpm-i Installation

Rpm–e Uninstall

Rpm–i–nodeps Ignore dependency installation

Rpm–i–force installation of a re- installed

Rpm–u upgrade, software does not exist is equivalent to-I

Rpm–u–oldpackage downgrade

Rpm–f upgrade, the software must first exist

Rpm–qa View All packages

Rpm–q Check a single package

which package is provided by the RPM–QF file

Rpm–l viewing software information

RPM–QPI Viewing package compilation information

RPM–QPL What files will be installed

rpm–qp–scipts Check script information

Rpm–v Package name (no output instructions, there is a problem with the output, such as Not available Rpm–i–force re-installation)

/ETC/PKI/RPM-GPG Signature File

Rpm–import Importing Signatures

Rpm–import/etc/pki/rpm-gpg/rpm-gpg-key-redhat-release

Rpm–qa |grep Gpg-pubkey

RPM–VVK Package name Check Signature

Yuminstall Installation

Yumremove/erase Uninstall

Yumupdate Upgrade

Yumgroup Install "KDE" installs a set of packages

Yumlocalinstall = Rpm–i

Yum search software name

Yumlist software name

Yum Listall

Yumgroup List

Yumwhatprovides/bin/ls = RPM–QF

Yum reinstall= rpm–i--force

This article is from the "Linux" blog, so be sure to keep this source http://yangzhiming.blog.51cto.com/4849999/1717778

RHCE (REDHAT7) (ii)