rhce training
Post on 14-Dec-2014
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DESCRIPTION
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Redhat Certified SystemAdministration (RHCSA) &Redhat Certified Engineer(RHCE)
Hardware requirement for RHEL6 Installation
• 64-bit system• Ram requirement• Hard Drive• CDROM Drive
Basic commands in RHCE6
• pwd • cd• ls • ls –l • vi • cat• rm
• mkdir• rmdir• more & less• head• tail• logout• init 0
• exit• clear• sudo• gedit• reboot• man
USERADD
1. /etc/passwd2. /etc/shadow3. /etc/gshadow 4. /etc/group5. /etc/spool/mail6. /etc/home
Description
R Read
W Write
X Execute
S Set user or group ID on execution
U Permission granted to user who owns the file
G Permission granted to user in the file’s group
O permission granted to other user
Digits permission 0 none 1 execute 2 write 4 read 3(1+2) write and execute 5(1+4) read and execute7(1+2+4) read, write and execute
RPM in Linux
1. rpm –q <package name>2. Rpm –qa3. Rpm –ivh foo-1.0-1.i386.rpm4. Rpm –e foo5. Rpm –Uvh foo-2.0.1.i386.rpm
Linux ACL
Categories of ACLs per file1. For an individual user2. For a user group3. Via the effective rights mask4. For users not in the user group associated
with file.
File system Administration
Useful commands for file system 1. Df –h2. Du3. Mount4. umount 5. Fdisk –l6. Fdisk /dev/sda7. Mkfs –t ext4 /dev/sda68. fstab
Create Swap partition
• Fdisk /dev/sda• Reboot –f• Mkswap /dev/sda6• Swapon /dev/sda• Fstab
LVM(logical volume management
For step for create a LVM1. Create PV2. Create VG3. Create LVM4. Format LVM & mount it
Basic commands for LVM
1. Pvcreate 2. Pvdisplay3. Vgcreate4. Vgdisplay5. Lvcreate6. mkfs.ext4 /dev/vol1/lv1
Extend LVM
• Lvextend +60MB /dev/vol0/lv1• Resize2fs /dev/vol0/lv1
Reduce LVM size
• Umount• E2fsck –f /dev/vol0/lv1• resize2fs /dev/vol0/lv1 60MB• Lvreduce 60MB /dev/vol0/lv1• mount
KERNEL and GRUB
“kernel is the core part of any operating system which allows every activity which is going to occur in your operation system”
* Command for kernel version- Uname –ro/p2.6.22-14-generic
servers
i. TELNETii. SSHiii. FTPiv. NISv. NFSvi. SAMBAvii. NTPviii. DNS
Configure Telnet server
1 . Server side• Install Telnet server software• Configure • Service xinetd restart• Security Setenforce 0 Iptables –f2. Client side* telnet <server ip>
Configure SSH Server
1. Server side• Install SSH server software • Configure SSH server• Service sshd restart• Security Setenforce 0 Iptables –f2. Client side* Ssh <server ip>
Configure FTP server
1. server side• Install FTP server software• Configure FTP server• Service vsftpd restart• Security Setenforce 0 Iptables –f2. Client side* Software install* ftp <server ip>
Configure NIS Server
1. Server side install ypserv software Configure NiS server service ypserv restart2. Client side install ypbind software run setup command
Configure NFS server
1. Server side install nfs –utis software configure server service nfs restart2. Client side mount <server ip> : /movies /media/abc
Configure SAMBA server
1. Server side install samba software configure samba service smb restart2. Client side install sambaclient software mount <server ip> : /movies /media/abc
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