Experience the new features of RHEL7

The official version of RHEL7 has finally come out, so it's okay to use RHEL7. Let's talk about some new features of RHEL7. the file system is changed to xfs, at that time still supports ext4 [root@localhostyum.repos.d] # df-T file system type 1 K-block &

The official version of RHEL7 has finally come out, so it's okay to use RHEL7. Let's talk about some new features of RHEL7.

1. When the file system was changed to xfs, ext4 was still supported.

[Root @ localhost yum. repos. d] # df-T

File System Type 1 K-block used available % mount point

/Dev/mapper/rhel-root xfs 52403200 949040 51454160/
Devtmpfs 499032 0 499032 0%/dev
Tmpfs 505432 0 505432 0%/dev/shm
Tmpfs 505432 6880 498552 2%/run
Tmpfs 505432 0 505432 0%/sys/fs/cgroup
/Dev/mapper/rhel-home xfs 70719756 32928 70686828/home
/Dev/sda1 xfs 508588 98224 410364 20%/boot
/Dev/sr0 iso9660 3654720 3654720 0 100%/media

2. The NIC will not be started automatically. You need to modify the configuration file, but you don't know why I have a problem with my Nic. eno

HWADDR = 00: 0C: 29: 59: 5D: 88
TYPE = Ethernet
BOOTPROTO = dhcp
DEFROUTE = yes
PEERDNS = yes
PEERROUTES = yes
20174_failure_fatal = no
IPV6INIT = yes
IPV6_AUTOCONF = yes
Required 6_defroute = yes
IPV6_PEERDNS = yes
20176_peerroutes = yes
20176_failure_fatal = no
NAME = eno16777736
UUID = 7e5321a3-9890-4fb0-a81b-d7f48c7795eb
ONBOOT = yes // The default value is no. You need to change it to yes.

3. mariadb is supported by default, but I don't know how to start it after installation.

[Root @ localhost ~] # Service mysqld start

Redirecting to/bin/systemctl start mysqld. service

Failed to issue method call: Unit mysqld. service failed to load: No such file or directory.

After reading the installation file, there is no startup file. Do you want to manually create it?

4. Upgrade kernel directly to 3.10

[Root @ localhost ~] # Uname-r

3.10.0-123. el7.x86 _ 64

5. various software packages are also upgraded accordingly.

[Root @ localhost ~] # Python-V

Python 2.7.5

6. In systems and services, RHEL 7.0 replaces SysV with systemd. Systemd Process Manager raises a debate between system administrators and Linux experts. The objective of Systemd is to replace the init system that has been used since the Unix era, and it is enough to guide loading services more effectively during process startup. The consequence is that the various startup commands are different.

7. Install AN httpd experiment.

[Root @ localhost ~] # Yum install httpd

Httpd upgraded directly to 2.4.6

[Root @ localhost ~] # Service httpd start

Redirecting to/bin/systemctl start httpd. service

[Root @ localhost ~] # Systemctl start httpd. service

In the future, the start command of the service will be unavailable, and changed to the systemctl command to start

By default, the firewall is enabled.

More advanced things, test again later, and try CentOS7 again if you have time.

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