Tech Arkit

Syslog Server Analyzing and Storing Logs - RHCSA

Youtube PlayLists

Shell-Scripting: https://goo.gl/a1Hu3s

Linux-Commands: https://goo.gl/QDoL7h

RHCSA Certification: https://goo.gl/X2Ksqn

Putty Software Tricks: https://goo.gl/MB1Do2

Linux OS: https://goo.gl/62p8s9

Follow Us on Social Media

Telegram Group: https://goo.gl/KPvMda

https://arkit.co.in/one-linux-tutorial/

Reddit: http://bit.ly/redditark

https://goo.gl/mcUvef

Mailing List: http://bit.ly/feedburnerark

https://goo.gl/fb/WAU7JG

Facebook: https://fb.com/linuxarkit

https://goo.gl/2QN4sD

LinkedIn: http://bit.ly/linkedark

https://goo.gl/ZLcikC

Twitter: https://twitter.com/aravikumar48

Google Plus: http://bit.ly/gplusark

https://goo.gl/79zwX9

OpenSSH (Secure Shell) Server and Client Configuration - RHCSA

1. A cryptographic handshake is made so that the client can verify that it is communicating with the correct server.

2. The transport layer of the connection between the client and remote host is encrypted using a symmetric cipher.

3. The client authenticates itself to the server.

4. The client interacts with the remote host over the encrypted connection.

openssh-server package installed

X11 forwarding

ssh -Y username@hostname

ssh -L local-port:remote-hostname:remote-port username@hostname

sshd(8) — The manual page for the sshd daemon documents available command line options and provides a complete list of supported configuration files and directories.

ssh(1) — The manual page for the ssh client application provides a complete list of available command line options and supported configuration files and directories.

scp(1) — The manual page for the scp utility provides a more detailed description of this utility and its usage.

sftp(1) — The manual page for the sftp utility.

ssh-keygen(1) — The manual page for the ssh-keygen utility documents in detail how to use it to generate, manage, and convert authentication keys used by ssh.

ssh_config(5) — The manual page named ssh_config documents available SSH client configuration options.

sshd_config(5) — The manual page named sshd_config provides a full description of available SSH daemon configuration options.

SSH (Secure Shell) is a protocol which facilitates secure communications between two systems using a client-server architecture and allows users to log in to server host systems remotely. Unlike other remote communication protocols, such as FTP or Telnet, SSH encrypts the login session, rendering the connection difficult for intruders to collect unencrypted passwords.

The ssh program is designed to replace older, less secure terminal applications used to log in to remote hosts, such as telnet or rsh. A related program called scp replaces older programs designed to copy files between hosts, such as rcp. Because these older applications do not encrypt passwords transmitted between the client and the server, avoid them whenever possible. Using secure methods to log in to remote systems decreases the risks for both the client system and the remote host.

Red Hat Enterprise Linux includes the general OpenSSH package, openssh, as well as the OpenSSH

server, openssh-server, and client, openssh-clients, packages. Note, the OpenSSH packages require the

OpenSSL package openssl-libs, which installs several important cryptographic libraries, enabling

OpenSSH to provide encrypted communications.

/etc/ssh/sshd_config,access linux server via ssh,activate ssh server linux,add ssh key to server,bash ssh,centos 7 ssh,client ssh,config ssh,configure ssh banner linux,configure ssh keys linux

How to Get Help From Linux Command Line and Man Pages - RHCSA

Getting Help From Command Line

:: Getting Help From Command Line ::

Not most of the production Server will have access to internet, because of security reasons, wihtout internet access how you can get an help using your command line interface. which is not a step by step guide but it will give you an idea to execute the commands and how commands works.

In Order to get the help, we have to use below commands in most of the situations.

1. Man
2. Pinfo
3. Command --help
4. Info
5. Help command

Man is the system's manual pager. Each page arugument given to man is normally the name of program, utility or function.

1 Executable programs or shell commands
2 System calls (functions provided by the kernel)
3 Library calls (functions within program libraries)
4 Special files (usually found in /dev)
5 File formats and conventions eg /etc/passwd
6 Games
7 Miscellaneous (including macro packages and conventions), e.g. man(7), groff(7)
8 System administration commands (usually only for root)
9 Kernel routines [Non standard]

man ls

man -a intro

man -t alias | lpr -Pps

man -k printf

man -s 3 -K "open"

Spacebar – Scrolling man page down

PageDown/Down Arrow – Scrolling man page down

PageUp/Up Arrow – Scrolling man page UP

/string – Search for particular string

n (key) – Repeat search Up to down

N (key) – Repeat search Down to up

g – Go to first to man page

G – Go to end of the man page

q – Exit from man page

pinfo

info

Whereis

whatis

command --help

basic linux command man,get command from linux,get command linux example,get command path linux,get help for linux command,get help in linux,get help linux,install man command on linux

lvextend Extending Logical Volume Size non-disruptively - RHCSA

centos 7 lvextend root,centos 7 lvextend xfs,centos lvextend,centos lvextend ext4,command lvextend in linux,e2fsck lvextend

How To Delete Standard Partitions in Linux - Tech Arkit

Linux Disk Partitioning Creating Standard Partitions - RHCSA - Tech Arkit

Special File Permissions Linux - SUID, SGID and Sticky Bit - Tech Arkit

bit sgid linux

command to set sgid in linux

difference between suid and sgid in linux

example of sgid in linux

example of suid and sgid in linux

find sgid files linux

find suid sgid linux

how to check sgid in linux

how to remove sgid bit in linux

how to remove sgid in linux

how to set sgid bit in linux

how to set sgid in linux

linux - suid/sgid file creation,linux add sgid,linux chmod sgid,linux chmod suid sgid,linux droit sgid,linux file permissions sgid,linux find files with suid and sgid,linux find sgid,linux find suid sgid files

linux group sgid

linux kernel 3.13 - (sgid) privilege escalation

linux permissions suid sgid

linux remove sgid bit

linux set sgid

linux set sgid bit

linux set sgid on directory

linux sgid bit

linux sgid bit directory

linux sgid chmod

linux sgid directory

linux sgid folder

linux sgid not working

linux sgid on directory

linux sgid privilege escalation

linux sgid recursive

linux sgid suid

linux suid sgid and sticky bit

linux suid sgid bit

linux suid sgid directory

linux suid sgid sticky

linux umask sgid

remove sgid from file linux

remove sgid in linux

remove sgid linux

set sgid bit linux

set sgid linux

set suid and sgid in linux

sgid and sticky bit linux

sgid command in linux

sgid files in linux

sgid files linux

sgid for directories in linux

sgid in linux

sgid in linux with examples

sgid linux

sgid linux directory

sgid linux examples

sgid linux permissions

sgid permission in linux

suid and sgid file permission in linux

suid and sgid in linux

suid and sgid in linux examples

suid and sgid in redhat linux

suid and sgid linux

suid et sgid sous linux

suid sgid and sticky bit in linux

suid sgid in linux

suid sgid linux

suid sgid linux examples

suid y sgid linux

use of suid and sgid in linux

what is sgid bit in linux

what is sgid files in linux

what is sgid in linux

what is suid and sgid in linux

what is suid sgid and sticky bit in linux

ACL - Access Control List - Linux Permissions - RHCSA

POSIX Access Control List ACL : To manage file security using POSIX (Portable Operating System Interface) access control list ( ACL ).

ACLs allows to assign different permissions for different users and groups. ACL allows fine-grained permissions to be allocated to a file. Users or groups as well as users and groups identified by a UID or GUID can be granted permissions.

The same permissions we can use below flags apply on files and directories.

Alpha Symbols

r: Read

w: Write

x: Execute

Numeric symbols

4 – Read

2 – Write

1 – Execute

- Permissions restricting access to a file to the file owner, membership of a single group or everyone.

- The file owner can set ACLs on individual files or directories.

- XFS file systems have built in ACL support.

- EXT4 file systems created on RHEL7 have ACL enabled by default.

POSIX Access Control List two types:

Access ACLs: we can use access ACLs to grant permissions for a particular file or directory.

Default ACLs: We can use default ACLs only on a directory but if a file inside that directory does not have an ACL, it inherits the permissions of the default ACLs of the directory.

https://arkit.co.in/posix-access-control-list-acl/

Youtube PlayLists

Shell-Scripting: https://goo.gl/a1Hu3s

Linux-Commands: https://goo.gl/QDoL7h

RHCSA Certification: https://goo.gl/X2Ksqn

Putty Software Tricks: https://goo.gl/MB1Do2

Linux OS: https://goo.gl/62p8s9

Follow Us on Social Media

Telegram Group: https://goo.gl/KPvMda

https://arkit.co.in/one-linux-tutorial/

Reddit: http://bit.ly/redditark

https://goo.gl/mcUvef

Mailing List: http://bit.ly/feedburnerark

https://goo.gl/fb/WAU7JG

Facebook: https://fb.com/linuxarkit

https://goo.gl/2QN4sD

LinkedIn: http://bit.ly/linkedark

https://goo.gl/ZLcikC

Twitter: https://twitter.com/aravikumar48

Google Plus: http://bit.ly/gplusark

https://goo.gl/79zwX9

Creating Linux Groups and Securing them with Password - RHCSA

Modify Linux User Properties and Set Password Age Policy

25 Basic Linux Commands Commonly Used in Daily Tasks

Download ISO and Centos 7 Installation Guide - Tech Arkit

Introduction to Linux Operating System

red hat certification,red hat linux certification,rhce,rhcsa,rhce certification,red hat certification cost,red hat certified engineer,rhel certification,red hat certification course,rhcsa exam,red hat course,rhcsa training,red hat courses,linux certification courses,rhce exam,red hat certification path,rhce certification cost,linux certification training,rhce exam fee,red hat certification fees

Bash Programming Play List: https://www.youtube.com/watch?v=7GNUzvjS_mE&list=PL8cE5Nxf6M6b8qW7CSMsdKbEsPdG9pWfu

Facebook Page: https://www.facebook.com/Linuxarkit/

LinkedIn Profile: https://www.linkedin.com/in/ravi-kumar-94530121

Google Plus: https://plus.google.com/u/0/+RedhatEnterpriseLinuxStepbyStepGuide

Twitter: https://twitter.com/aravikumar48

RSS Feed: https://feedburner.google.com/fb/a/mailverify?uri=arkit

Reddit: https://www.reddit.com/user/aravikumar48/

Tumblr: https://www.tumblr.com/blog/aravikumar48

Menu