RHEL6 LDAP server configuration issue and solve

Summary Encountered quite a few problems when configure LDAP simple server on RHEL6, resolved all the issues through the internet. Refer to the reference link for more detail. Problem and resolve no DB_CONFIG file bdb_db_open: warning – no DB_CONFIG file found in directory /var/lib/ldap: (2). By copy the DB file to the relative folder, solved […]

RHEL6 RHCE exam in Singapore

Just passed the RHCE exam of RHEL6 in Singapore, took the exam of EX200 (RHCSA) on 9th Oct. 2014 morning, and EX300 (RHCE) on 24th Oct. 2014 morning, each exam cost me 749 SGD, so I spent 1498 SGD for this certification, quite expensive, I heard back in China the same price will include the […]

RHCE6 Preperation (11) – Quota

Create quota for user alice and /home/alice, least/soft limit is 40K, when exceeding 80K, the system will display the exceeded the user quota. 1, check the kernel support the quota function, [root@server4 home]# grep CONFIG_QUOTA /boot/config-2.6.32-358.6.1.el6.x86_64 CONFIG_QUOTA=y CONFIG_QUOTA_NETLINK_INTERFACE=y # CONFIG_QUOTA_DEBUG is not set CONFIG_QUOTA_TREE=y CONFIG_QUOTACTL=y [root@server4 home]# 2, modify the /etc/fstab to activate the quota […]

RHCE6 Preperation (9) – SMTP,MTA, shell script, ftp

1, Configure SMTP mail service according to the following requiremnets:— Your mail server should accept mail from remote hosts and localhost— harry must be able to receive mail from remote hosts — Mail delivered to mary should spool into the default mail spool for mary /var/spool/mail/mary install the postfix, yum install -y postfix start the postfix […]

RHCE6 Preperation (8) – http, virtual host, http limited access

1, Implement a web server for the site http://serverX.example.com,then perform the following steps:— Download ftp://instructor.example.com/pub/rhce/server.html— Rename the downloaded file to index.html— Copy this index.html to DocumountRoot of your web server — Do NOT make any modifications to the content of index.html Install the http, yum install http* start the service and make it auto start when […]

RHCE6 Preperation (7) – vsftp,ISCSI,SMB

1, control the FTP access the system, Clients within the example.com domain should have anonymous FTP access to your machine, Clients outside example.com should NOT have access to your FTP Service modify the /etc/hosts.allow vsftpd: .example.com modify the /etc/hosts.deny vsftpd: ALL start the vsftpd and make it auto on /etc/init.d/vsftpd start chckconfig vsftpd on 2, connect to […]

RHCE6 Preperation (6) – httpd, lvm, grep, ssh, nfs

1, install the http server, make it automatically startup yum install -y http* /etc/init.d/httpdd start chkconfig httpd on 2, create logical volume, name as lv0, lv0 belong to logical group vg0, PE size as 8M, logical volume as 40 PE, formatted as ext4, mount to /data, and make it automatically mounted when start, fdisk /dev/sda […]

RHCE6 Preperation (5) – ldap, NIS, NTP, setfacl,vsftp

1, ldap for user authentication, without autofs Bind to the ldap domain provided by 192.168.0.254 for user authentication. Note the following: — ldapuserx should be able to log into your system, where x is your server number,but will not have a home directory until you have completed autofs requirement below — All LDAP user have […]

RHCE6 Preperation (4) – user/group, kernel install, printer, crontab

1, create group, add user belong to the group, and create password, create the group ‘admin’ groupadd admin add user to the group, useradd -G admin mary useradd -G admin alice useradd -s /sbin/nologin bobby user bobby added, but does not belong to group admin, and dose not have access to an interactive shell on the system. […]

RHCE6 Preperation (3) – find & copy, lvm resize, swap partition create

1, find the file belong to lucy and copy to a folder, create the find folder, mkdir /tmp/findfiles find the file the owner is lucy, use the parameter -user and -exec find / -user lucy -exec cp -a {} /tmp/findfiles \; 2, enlarge the lvm, no need to umount, lvextend -L 190M /dev/mapper/vgsrv-common then extend […]

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