Friday 28 June 2013
You (root) are not allowed to access to (crontab) because of pam configuration.
Error Massage :
# crontab -e
Permission denied
You (root) are not allowed to access to (crontab) because of pam configuration.
Solution :
open with vi /etc/pam.d/crond
#
# The PAM configuration file for the cron daemon
#
#
# No PAM authentication called, auth modules not needed
account required pam_access.so
to
#account required pam_access.so
account include password-auth
session required pam_loginuid.so
session include password-auth
auth include password-auth
Problem would be resolved.
~
Wednesday 26 June 2013
How to compress and extract zip, tar , tar.gz and tar.bz2 in Linux/RHEL/Centos
ZIP : Compress and extract zip file in Linux
Compress file and folder with zip# zip -r archive-name.zip directory_name
extract file and folder with zip
#unzip archive-name.zip
TAR: Compress and extract TAR file in Linux
Compress file and folder with tar# tar -cvf archive-name.tar directory_name
extract file and folder with tar
# tar -xvf archive-name.tar
Define location where you want to extract
# tar -xvf archive-name.tar -C /home/extract-here/
TAR.GZ: Compress and extract TAR.GZ file in Linux
Compress file and folder with tar.gz# tar -zcvf archive-name.tar.gz directory_name
extract file and folder with tar
# tar -zxvf archive-name.tar.gz
Define location where you want to extract
# tar -zxvf archive-name.tar.gz -C /tmp/extract_here/
TAR.BZ2: Compress and extract TAR.BZ2 file in Linux
Compress file and folder with tar.bz2# tar -jcvf archive-name.tar.bz2 directory_name
extract file and folder with tar
# tar -jxvf archive-name.tar.bz2
Define location where you want to extract
# tar -jxvf archive-name.tar.bz2 -C /tmp/extract_here/
Configure Limit all SSH users to access from specific IP
Confiure Limit all
SSH users to access from specific IP
1. Step : vi /etc/security/access.conf and make changes:
# This term will be evaluated by string matching.
# comment: It might be better to use network/netmask
instead.# The same is 192.168.201.0/24 or 192.168.201.0/255.255.255.0
#+ : root : 192.168.1. 10.201.5.0. 125.15.62. (required network)
to
+ : root : 192.168.1. 10.201.5.0. 125.15.62.
#
# User "root" should be able to have access from domain.
# Uses string matching also.
#+ : root : .foo.bar.org
#
# User "root" should be denied to get access from all other sources.
#- : root : ALL
to
- : root : ALL
#
# User "foo" and members of netgroup "nis_group" should be
2. step open ssh pam file
vi /etc/pam.d/sshdauth required pam_sepermit.so
auth include password-auth
account required pam_access.so ( add this line)
account required pam_nologin.so
account include password-auth
password include password-auth
# pam_selinux.so close should be the first session rule
session required pam_selinux.so close
session required pam_loginuid.so
# pam_selinux.so open should only be followed by sessions to be executed in the user context
session required pam_selinux.so open env_params
session optional pam_keyinit.so force revoke
session include password-auth
#/etc/inid.d/sshd restart
Wednesday 19 June 2013
Check Hardware RAID configuration command in Linux
Using SAS drive :
#cd /proc/driver/cciss/
#cat cciss0
Using SCSI drive :
#cat /proc/scsi/scsi
Thursday 6 June 2013
The requested URL returned error: 404" Trying other mirror
Problem when install and remove any package in linux
http://repos.fedorapeople.org/repos/peter/erlang/epel-6/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 22 - "The requested URL returned error: 404" Trying other mirror.
Solution :
remove repos form repository:
# cd cd /etc/yum.repos.d/
#rm epel-erlang.repo
#yum install java( which package you want install)
http://repos.fedorapeople.org/repos/peter/erlang/epel-6/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 22 - "The requested URL returned error: 404" Trying other mirror.
Solution :
remove repos form repository:
# cd cd /etc/yum.repos.d/
#rm epel-erlang.repo
#yum install java( which package you want install)
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