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Lesson Posted on 16/10/2017 Learn IT Courses/Hadoop/Hadoop Testing
SYSRO TECH SOLUTIONS PVT LTD SYSRO
SYSRO Tech Solutions Pvt. Ltd. is the best Hadoop Training Institute in Bangalore provide Hadoop Training...
USER MACHINE = (RUN_AS) COMMANDS
%group ALL = (root) /sbin/ifconfig
%wheel ALL=(ALL) ALL
%admins ALL=(ALL) NOPASSWD: ALL
joseph ALL=NETWORKING
User_Alias
to grant access to list of usersUser_Alias ADMINS = lex, john
Cmnd_Alias
to set a list of commandsCmnd_Alias NETWORKING = /sbin/ruote, /sbin/ifconfig
# man sudoers Runas_Member ::= '!'* user name | '!'* '#'uid | '!'* '%'group | '!'* +netgroup | '!'* Runas_Alias
system-config-authentication.
authconfig.
> authconfig --enableldap --ldapserver=instructor.example.com \ --enableldaptls --ldaploadcacert=ftp://instructor.example.com/pub/example-ca.crt \ --ldapbasedn="dc=example,dc=com" --disableldapauth --enablekrb5 \ --krb5kdc=instructor.example.com --krb5adminserver=instructor.example.com \ --krb5realm=EXAMPLE.COM --enablesssdauth --update
yum groupinstall directory-client
yum install openldap-clients
yum install krb5-workstation
klist: L
ist tickets.kdestroy: D
elete tickets.kinit: G
et new tickets.$ klist Ticket cache: FILE:/tmp/krb5cc_1701_5hTCSt Default principal: ldapuser1@EXAMPLE.COM Valid starting Expires Service principal 08/05/13 12:35:36 08/06/13 12:35:35 krbtgt/EXAMPLE.COM@EXAMPLE.COM renew until 08/05/13 12:35:36 $ kdestroy $ klist klist: No credentials cache found (ticket cache FILE:/tmp/krb5cc_1701_5hTCSt) $ kinit Password for ldapuser1@EXAMPLE.COM: $ klist Ticket cache: FILE:/tmp/krb5cc_1701_5hTCSt Default principal: ldapuser1@EXAMPLE.COM Valid starting Expires Service principal 08/05/13 12:35:46 08/06/13 12:35:44
/etc/sssd/sssd.conf
to configure SSSD.authconfig
to edit it via the command-line./var/log/sssd.
/etc/sssd/sssd.conf
by adding debug_level=10
under [domain/default]
(0 - 10).Lesson Posted on 22/10/2016 Learn IT Courses/Red Hat
Shell Scripting - The underrated programming language of system administrators
Shriharsh T.
"Knowledge Grows When Shared". I passed from Mumbai University and been with IT industry since 2009....
It is oft repeated that the next wave of IT is automation. But automation is not new - it existed before in terms of automated installation, sending birthday mails etc.
It was not untill you actually work in large IT Infrastructure that you realise what is running in the background. The chances of working on Unix / Linux servers in telecom, manufacture or banking is very high. And most of the routine tasks including installation and upgrade would be automated. You touch the shell scripting at this stage - directly or indirectly.
The shell scripts are often confused with shell commands. That should not be the case.
Shell commands forms the basis of the scripts. But as with other programming languages, shell scripts also have advanced concepts.
Also, there are no alternate to shell scripts if you want to have something automated in boot / console mode of unix / linux systems.
Hence, sufficient knowledge of shells and related scripts is must for any system administrator to become a 'Pro' - now and in future.
read less
Answered on 21/02/2016 Learn IT Courses/Red Hat
Sandip Kumar Nath
Best IT trainer
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