Red Hat EX200 - Questions & Answers

crontab -e -u natasha
23 14/bin/echo hiya crontab -l -u natasha // view
systemctlenable crond
systemcdlrestart crond

/etc/sysconfig/selinux
SELINUX=enforcing

useradd eric
passwd eric
vi /etc/passwd eric:x:505:505::/home/eric:/sbin/nologin

Which shell or program should start at login time is specified in /etc/passwd file? By default, Redhat Enterprise Linux assigns the /bin/bash shell to the users. To deny the interactive login, you should write / sbin/nologin or /bin/ false instead of login shell.

vi /etc/sysconfing/network NETWORKING=yes HOSTNAME=station?.example.com
GATEWAY=192.168.0.254
service network restart 2. vi /etc/sysconfig/network-scripts/ifcfg-eth0 DEVICE=eth0
ONBOOT=yes
BOOTPROTO=static IPADDR=X.X.X.X
NETMASK=X.X.X.X
GATEWAY=192.168.0.254
ifdown eth0
ifup eth0

# cd /etc/yum.repos.d
# vim local.repo
[local]
name=local.repo
baseurl=file:///mnt
enabled=1
gpgcheck=0
# yum makecache
# yum install -y vsftpd
# service vsftpd restart
# chkconfig vsftpd on
# chkconfig --list vsftpd
# vim /etc/vsftpd/vsftpd.conf
anonymous_enable=YES

# fdisk /dev/vda
n
+512M
w
# partprobe /dev/vda
# mkfs -t ext4 /dev/vda5
# mkdir -p /data
# vim /etc/fstab
/dev/vda5 /data ext4 defaults 0 0
# mount -a

# crontab -e -u natasha
23 14 * * * /bin/echo hiya
wq!

yum install vsftpd
/etc/init.d/vsftpd start chkconfig vsftpd on

rpm -ivh ftp://server1/example.com/pub/updates/zsh-*
or

Login to ftp server : ftp ftp://server1.example.com using anonymous user.
Change the directory: cd pub and cd updates Download the package: mget zsh-*
Quit from the ftp prompt : bye Install the package rpm -ivh zsh-*
Verify either package is installed or not : rpm -q zsh

system-config-authentication LDAP Server: ldap//instructor.example.com (In domain form, not write IP) OR
# yum groupinstall directory-client (1.krb5-workstation 2.pam-krb5 3.sssd)
# system-config-authentication
1. User Account Database: LDAP
2. LDAP Search Base DN: dc=example,dc=com 3. LDAP Server: ldap://instructor.example.com (In domain form, not write IP)
4. Download CA Certificate
5. Authentication Method: LDAP password
6. Apply getent passwd ldapuser40