Berikut cara untuk mengganti HostName di CentOS atau RedHat
[root@centos ~]# vi /etc/hosts
[root@centos ~]#
[root@centos ~]# vi /etc/hostname
[root@centos ~]#
[root@centos ~]# cat /etc/hostname
[root@centos ~]#
Tampilkan postingan dengan label RedHat. Tampilkan semua postingan
Tampilkan postingan dengan label RedHat. Tampilkan semua postingan
[root@centos ~]# vi /etc/hostname
[root@centos ~]#
[root@centos ~]# cat /etc/hostname
[root@centos ~]#
Dalam artikel kali ini saya akan sharring bagaimana caranya untuk merubah IP Address di CentOS-7 atau RedHat-7 :
-Cek nama interface (apakah eth0, ens160, enp0s3, dll)
nmcli d
[root@centos ~]# nmcli d
DEVICE TYPE STATE CONNECTION
ens160 ethernet connected ens160
lo loopback unmanaged --
[root@centos ~]#
-Cek IP Address Sebelum di ubah : 192.168.88.100
ifconfig
[root@centos ~]# ifconfig
ens160: flags=4163 mtu 1500
inet 192.168.88.100 netmask 255.255.255.0 broadcast 192.168.88.255
inet6 fe80::20c:29ff:fe5a:6451 prefixlen 64 scopeid 0x20
ether 00:0c:29:5a:64:51 txqueuelen 1000 (Ethernet)
RX packets 635505 bytes 70327985 (67.0 MiB)
RX errors 0 dropped 24 overruns 0 frame 0
TX packets 13861 bytes 2584969 (2.4 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
-Barulah kita ubah IP Address nya menjadi : 192.168.88.110
vi /etc/sysconfig/network-scripts/ifcfg-ens160
[root@centos ~]# vi /etc/sysconfig/network-scripts/ifcfg-ens160
TYPE=Ethernet
BOOTPROTO=static
IPADDR=192.168.88.110
NETMASK=255.255.255.0
GATEWAY=192.168.88.1
DNS1=8.8.8.8
DNS2=202.159.32.2
DEFROUTE=yes
PEERDNS=yes
PEERROUTES=yes
IPV4_FAILURE_FATAL=no
#IPV6INIT=no
#IPV6_AUTOCONF=no
#IPV6_DEFROUTE=no
#IPV6_PEERDNS=no
#IPV6_PEERROUTES=no
#IPV6_FAILURE_FATAL=no
NAME=ens160
UUID=921dab9c-9209-4a61-b1e5-f5ee5d96d349
DEVICE=ens160
ONBOOT=yes
[root@centos ~]#
setelah di ubah jangan lupa di save :wq
-Setelah dilakukan perubahan ip kita wajib merestart service networknya agar IP barunya aktif :
atau
/etc/init.d/network restart
-Setelah restart service kita coba akses dan membuka terminal kembali menggunakan IP Baru
Berikut Script untuk mengecek IP Address pada CentOS dan RedHat
ifconfig
[root@centos ~]# ifconfig
ens160: flags=4163
inet 192.168.88.100 netmask 255.255.255.0 broadcast 192.168.88.255
inet6 fe80::20c:29ff:fe5a:6451 prefixlen 64 scopeid 0x20
ether 00:0c:29:5a:64:51 txqueuelen 1000 (Ethernet)
RX packets 620208 bytes 69236740 (66.0 MiB)
RX errors 0 dropped 24 overruns 0 frame 0
TX packets 13680 bytes 2557071 (2.4 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
ip add
[root@centos ~]# ip add
2: ens160:
link/ether 00:0c:29:5a:64:51 brd ff:ff:ff:ff:ff:ff
inet 192.168.88.100/24 brd 192.168.88.255 scope global noprefixroute ens160
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fe5a:6451/64 scope link
valid_lft forever preferred_lft forever
[root@centos ~]#
Dalam tulisan kali ini saya akan sharring cara untuk membuat user baru di CentOS atau RedHat, dengan privilage Super User yang bisa Sudo, Oke langsung saja Check This Out :
adduser nama_user_baru (membuat user baru)
passwd nama_user_baru (memberikan password login user baru)
Contoh :
[root@centos ~]# adduser nurman
[root@centos ~]# passwd nurman
Changing password for user nurman.
New password:
Retype new password:
passwd: all authentication tokens updated successfully.
[root@centos ~]#
Cek apakah User tersebut sudah ada :
[root@centos ~]# cat /etc/passwd
root:x:0:0:root:/root:/bin/bash
nurman:x:1000:1000::/home/nurman:/bin/bash
[root@centos ~]#
Agar user ini bisa melakukan Sudo (Super User)
-install sudo (jika di server belum ada) yum install sudo (pastikan server bisa konek inet) :
-cari file name : "sudoers" di dalam directory /etc/ :
[root@centos ~]# cd /etc/
[root@centos etc]# ls -la | grep sudo
-rw-r-----. 1 root root 1786 Oct 30 2018 sudo.conf
-r--r-----. 1 root root 4328 Oct 30 2018 sudoers
drwxr-x---. 2 root root 6 Oct 31 2018 sudoers.d
-rw-r-----. 1 root root 3181 Oct 30 2018 sudo-ldap.conf
[root@centos etc]#
-edit isi dari file sudoers : vi sudoers (kalo prefilagenya read only ganti dulu) chmod 777 sudoers
-atau ketik : visudo
-root ALL=(ALL) ALL
-tambahkan
-nurman ALL=(ALL) ALL
-jangan lupa di save :wq!
-kembalikan lagi ke semula previlage file sudoers :chmod 440 sudoers
Kemudian kita coba login menggunakan User yang telah kita buat tadi :
login as: nurman
nurman@192.168.88.100's password:
[nurman@centos ~]$ sudo su
We trust you have received the usual lecture from the local System
Administrator. It usually boils down to these three things:
#1) Respect the privacy of others.
#2) Think before you type.
#3) With great power comes great responsibility.
[sudo] password for nurman:
[root@centos nurman]#
Script CentOS RedHat Mengecek Proses yang Sedang Berjalan (task manager)
ps aux
[root@centos ~]# ps aux
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 1 0.0 0.3 46192 6496 ? Ss May08 0:05 /usr/lib/systemd/systemd --system --deserialize 17
root 2 0.0 0.0 0 0 ? S May08 0:00 [kthreadd]
root 3 0.0 0.0 0 0 ? S May08 0:00 [ksoftirqd/0]
root 5 0.0 0.0 0 0 ? S< May08 0:00 [kworker/0:0H]
root 7 0.0 0.0 0 0 ? S May08 0:00 [migration/0]
root 8 0.0 0.0 0 0 ? S May08 0:00 [rcu_bh]
root 9 0.0 0.0 0 0 ? R May08 0:02 [rcu_sched]
root 10 0.0 0.0 0 0 ? S< May08 0:00 [lru-add-drain]
root 11 0.0 0.0 0 0 ? S May08 0:00 [watchdog/0]
root 13 0.0 0.0 0 0 ? S May08 0:00 [kdevtmpfs]
root 14 0.0 0.0 0 0 ? S< May08 0:00 [netns]
root 15 0.0 0.0 0 0 ? S May08 0:00 [khungtaskd]
root 16 0.0 0.0 0 0 ? S< May08 0:00 [writeback]
root 17 0.0 0.0 0 0 ? S< May08 0:00 [kintegrityd]
root 18 0.0 0.0 0 0 ? S< May08 0:00 [bioset]
root 19 0.0 0.0 0 0 ? S< May08 0:00 [bioset]
root 20 0.0 0.0 0 0 ? S< May08 0:00 [bioset]
root 21 0.0 0.0 0 0 ? S< May08 0:00 [kblockd]
root 22 0.0 0.0 0 0 ? S< May08 0:00 [md]
root 23 0.0 0.0 0 0 ? S< May08 0:00 [edac-poller]
root 24 0.0 0.0 0 0 ? S< May08 0:00 [watchdogd]
root 30 0.0 0.0 0 0 ? S May08 0:00 [kswapd0]
root 31 0.0 0.0 0 0 ? SN May08 0:00 [ksmd]
root 32 0.0 0.0 0 0 ? SN May08 0:00 [khugepaged]
root 33 0.0 0.0 0 0 ? S< May08 0:00 [crypto]
root 41 0.0 0.0 0 0 ? S< May08 0:00 [kthrotld]
root 42 0.0 0.0 0 0 ? S May08 0:00 [kworker/u2:1]
root 43 0.0 0.0 0 0 ? S< May08 0:00 [kmpath_rdacd]
top - 10:32:50 up 1 day, 17:58, 2 users, load average: 0.00, 0.01, 0.05
Tasks: 104 total, 1 running, 103 sleeping, 0 stopped, 0 zombie
%Cpu(s): 0.0 us, 0.0 sy, 0.0 ni,100.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
KiB Mem : 1882620 total, 1031720 free, 148580 used, 702320 buff/cache
KiB Swap: 2097148 total, 2097148 free, 0 used. 1490816 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1 root 20 0 46192 6496 3956 S 0.0 0.3 0:05.37 systemd
2 root 20 0 0 0 0 S 0.0 0.0 0:00.01 kthreadd
3 root 20 0 0 0 0 S 0.0 0.0 0:00.24 ksoftirqd/0
5 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 kworker/0:0H
7 root rt 0 0 0 0 S 0.0 0.0 0:00.00 migration/0
8 root 20 0 0 0 0 S 0.0 0.0 0:00.00 rcu_bh
9 root 20 0 0 0 0 S 0.0 0.0 0:02.36 rcu_sched
10 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 lru-add-drain
11 root rt 0 0 0 0 S 0.0 0.0 0:00.30 watchdog/0
13 root 20 0 0 0 0 S 0.0 0.0 0:00.00 kdevtmpfs
14 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 netns
15 root 20 0 0 0 0 S 0.0 0.0 0:00.08 khungtaskd
16 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 writeback
17 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 kintegrityd
18 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 bioset
19 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 bioset
20 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 bioset
21 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 kblockd
22 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 md
23 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 edac-poller
24 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 watchdogd
30 root 20 0 0 0 0 S 0.0 0.0 0:00.00 kswapd0
31 root 25 5 0 0 0 S 0.0 0.0 0:00.00 ksmd
netstat -tapn
[root@centos ~]# netstat -tapn
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN 1/systemd
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 5297/sshd
tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN 5604/master
tcp 0 64 192.168.88.100:22 192.168.88.12:59758 ESTABLISHED 16363/sshd: root@pt
tcp6 0 0 :::111 :::* LISTEN 1/systemd
tcp6 0 0 :::22 :::* LISTEN 5297/sshd
tcp6 0 0 ::1:25 :::* LISTEN 5604/master
netstat -tapn | grep sshd
[root@centos ~]# netstat -tapn | grep sshd
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 5297/sshd
tcp 0 64 192.168.88.100:22 192.168.88.12:59758 ESTABLISHED 16363/sshd: root@pt
tcp6 0 0 :::22 :::* LISTEN 5297/sshd
[root@centos ~]#
netstat -tapn | grep 22
[root@centos ~]# netstat -tapn | grep 22
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 5297/sshd
tcp 0 64 192.168.88.100:22 192.168.88.12:59758 ESTABLISHED 16363/sshd: root@pt
tcp6 0 0 :::22 :::* LISTEN 5297/sshd
[root@centos ~]#
Melihat Aplikasi atau Paket Tertentu yang Terinstall
rpm -qa | grep nama_aplikasi
Contoh :
[root@centos ~]# rpm -qa | grep tcpdump
tcpdump-4.9.2-3.el7.x86_64
[root@centos ~]#
[root@centos ~]# rpm -qa | grep openssl
openssl-libs-1.0.2k-16.el7_6.1.x86_64
openssl-1.0.2k-16.el7_6.1.x86_64
Melihat Seluruh Aplikasi atau Paket yang Terinstall
rpm -qa
Contoh :
[root@centos ~]# rpm -qa
man-pages-3.53-5.el7.noarch
harfbuzz-1.7.5-2.el7.x86_64
glusterfs-api-3.12.2-18.el7.x86_64
grub2-common-2.02-0.76.el7.centos.1.noarch
libini_config-1.3.1-32.el7.x86_64
kbd-misc-1.15.5-15.el7.noarch
yum-plugin-fastestmirror-1.1.31-50.el7.noarch
audit-2.8.4-4.el7.x86_64
compat-libical1-1.0.1-2.el7.x86_64
biosdevname-0.7.3-1.el7.x86_64
libselinux-2.5-14.1.el7.x86_64
hardlink-1.0-19.el7.x86_64
fxload-2002_04_11-16.el7.x86_64
ledmon-0.90-1.el7.x86_64
perl-Getopt-Long-2.40-3.el7.noarch
cdparanoia-libs-10.2-17.el7.x86_64
tcpdump-4.9.2-3.el7.x86_64
libattr-2.4.46-13.el7.x86_64
crash-trace-command-2.0-14.el7.x86_64
libgpg-error-1.12-3.el7.x86_64
libpng-1.5.13-7.el7_2.x86_64
policycoreutils-2.5-29.el7_6.1.x86_64
ps_mem-3.1-7.el7.noarch
audit-libs-2.8.4-4.el7.x86_64
cups-libs-1.6.3-35.el7.x86_64
sg3_utils-1.37-17.el7.x86_64
dbus-glib-0.100-7.el7.x86_64
libnl3-3.2.28-4.el7.x86_64
libstoragemgmt-python-1.6.2-4.el7.noarch
yum list | grep nama_paket
Contoh :
openssh.x86_64 7.4p1-16.el7 @base
openssh-clients.x86_64 7.4p1-16.el7 @base
openssh-server.x86_64 7.4p1-16.el7 @base
openssh-askpass.x86_64 7.4p1-16.el7 base
openssh-cavs.x86_64 7.4p1-16.el7 base
openssh-keycat.x86_64 7.4p1-16.el7 base
openssh-ldap.x86_64 7.4p1-16.el7 base
openssh-server-sysvinit.x86_64 7.4p1-16.el7 base
Melihat Seluruh Paket yang terdapat dalam Repository Yum yang Terinstall
yum list
Contoh :
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
* base: mirror.dionipe.net
* extras: mirror.dionipe.net
* updates: mirror.dionipe.net
Installed Packages
GConf2.x86_64 3.2.6-8.el7 @anaconda
GeoIP.x86_64 1.5.0-13.el7 @base
NetworkManager.x86_64 1:1.12.0-10.el7_6 @updates
NetworkManager-libnm.x86_64 1:1.12.0-10.el7_6 @updates
NetworkManager-ppp.x86_64 1:1.12.0-10.el7_6 @updates
NetworkManager-team.x86_64 1:1.12.0-10.el7_6 @updates
NetworkManager-tui.x86_64 1:1.12.0-10.el7_6 @updates
OpenEXR-libs.x86_64 1.7.1-7.el7 @anaconda
PyGreSQL.x86_64 4.0-9.el7 @anaconda
abrt.x86_64 2.1.11-52.el7.centos @base
abrt-addon-ccpp.x86_64 2.1.11-52.el7.centos @base
abrt-addon-kerneloops.x86_64 2.1.11-52.el7.centos @base
abrt-addon-pstoreoops.x86_64 2.1.11-52.el7.centos @base
abrt-addon-python.x86_64 2.1.11-52.el7.centos @base
abrt-addon-vmcore.x86_64 2.1.11-52.el7.centos @base
abrt-addon-xorg.x86_64 2.1.11-52.el7.centos @base
abrt-cli.x86_64 2.1.11-52.el7.centos @base
abrt-console-notification.x86_64 2.1.11-52.el7.centos @base
abrt-dbus.x86_64 2.1.11-52.el7.centos @base
abrt-libs.x86_64 2.1.11-52.el7.centos @base
abrt-python.x86_64 2.1.11-52.el7.centos @base
abrt-retrace-client.x86_64 2.1.11-52.el7.centos @base
abrt-tui.x86_64 2.1.11-52.el7.centos @base
acl.x86_64 2.2.51-14.el7 @base
adwaita-cursor-theme.noarch 3.28.0-1.el7 @base
aic94xx-firmware.noarch 30-6.el7 @anaconda
alsa-firmware.noarch 1.0.28-2.el7 @anaconda
alsa-lib.x86_64 1.1.6-2.el7 @base
alsa-tools-firmware.x86_64 1.1.0-1.el7 @base
apr.x86_64 1.4.8-3.el7_4.1 @base
apr-util.x86_64 1.5.2-6.el7 @anaconda
at.x86_64 3.1.13-24.el7 @base
atk.x86_64 2.28.1-1.el7 @base
attica.x86_64 0.4.2-1.el7 @base
attr.x86_64 2.4.46-13.el7 @base
audit.x86_64 2.8.4-4.el7 @base
audit-libs.i686 2.8.4-4.el7 @base
audit-libs.x86_64 2.8.4-4.el7 @base
augeas-libs.x86_64 1.4.0-6.el7_6.1 @updates
authconfig.x86_64 6.2.8-30.el7 @base
autofs.x86_64 1:5.0.7-99.el7 @base
avahi-autoipd.x86_64 0.6.31-19.el7 @base
avahi-libs.x86_64 0.6.31-19.el7 @base
