[root@convirt kitbag]# tzselect
Please identify a location so that time zone rules can be set correctly.
Please select a continent or ocean.
1) Africa
2) Americas
3) Antarctica
4) Arctic Ocean
5) Asia
6) Atlantic Ocean
7) Australia
8) Europe
9) Indian Ocean
10) Pacific Ocean
11) none - I want to specify the time zone using the Posix TZ format.
#? 5
Please select a country.
1) Afghanistan 18) Israel 35) Palestine
2) Armenia 19) Japan 36) Philippines
3) Azerbaijan 20) Jordan 37) Qatar
4) Bahrain 21) Kazakhstan 38) Russia
5) Bangladesh 22) Korea (North) 39) Saudi Arabia
6) Bhutan 23) Korea (South) 40) Singapore
7) Brunei 24) Kuwait 41) Sri Lanka
8) Cambodia 25) Kyrgyzstan 42) Syria
9) China 26) Laos 43) Taiwan
10) Cyprus 27) Lebanon 44) Tajikistan
11) East Timor 28) Macau 45) Thailand
12) Georgia 29) Malaysia 46) Turkmenistan
13) Hong Kong 30) Mongolia 47) United Arab Emirates
14) India 31) Myanmar (Burma) 48) Uzbekistan
15) Indonesia 32) Nepal 49) Vietnam
16) Iran 33) Oman 50) Yemen
17) Iraq 34) Pakistan
#? 14
The following information has been given:
India
Therefore TZ='Asia/Kolkata' will be used.
Local time is now: Mon Oct 25 14:52:34 IST 2010.
Universal Time is now: Mon Oct 25 09:22:34 UTC 2010.
Is the above information OK?
1) Yes
2) No
#? 1
You can make this change permanent for yourself by appending the line
TZ='Asia/Kolkata'; export TZ
to the file '.profile' in your home directory; then log out and log in again.
Here is that TZ value again, this time on standard output so that you
can use the /usr/bin/tzselect command in shell scripts:
Asia/Kolkata
Monday, October 25, 2010
Installing Postfix Admin on Cent OS / RedHat / Fedora
1. Install the Postfix Admin requirements using the command below.
#yum install mysql-server php-mysql php-imap httpd postfix dovecot
2. Download the latest stable version of Postfix Admin in .tar.gz format.
Assuming you got the file postfixadmin-2.3.2.tar.gz and it is located on your Desktop,
type in the commands below to extract and to put it into its proper directory.
#tar xvfz postfixadmin-2.3.2.tar.gz
#mv postfixadmin-2.3.2 /usr/share/postfixadmin
#vim /etc/httpd/conf.d/postfixadmin.conf
# # Web application to manage Postfix email server # Directory "/usr/share/postfixadmin" Order Allow,Deny Allow from all Directory Alias /postfixadmin /usr/share/postfixadmin Alias /PostFixAdmin /usr/share/postfixadmin Alias /PostfixAdmin /usr/share/postfixadmin
3. Edit the file /usr/share/postfixadmin/config.inc.php and update the following lines below. $CONF['configured'] = true; $CONF['postfix_admin_url'] = '/postfixadmin'; $CONF['database_type'] = 'mysqli'; $CONF['database_host'] = 'localhost'; $CONF['database_user'] = 'postfix'; $CONF['database_password'] = 'your_password'; $CONF['database_name'] = 'postfix'; $CONF['domain_path'] = 'YES'; $CONF['domain_in_mailbox'] = 'NO'; $CONF['encrypt'] = 'cleartext'; $CONF['emailcheck_resolve_domain] = 'NO';
#service mysqld start
4.Launch the MySQL command line tool using the command below. mysql -u root -p The default root password of MySQL is a blank password. Next, create a new MySQL database for Postfix Admin using the commands below. mysql> CREATE DATABASE postfix; mysql> CREATE USER postfix@localhost IDENTIFIED BY 'your_password'; mysql> GRANT ALL PRIVILEGES ON postfix.* TO postfix;
#service httpd start
5.Go to the Postfix Admin setup page at http://localhost/postfixadmin/setup.php and fill in the setup password. Next, click the Generate password hash.
6.Get the generated setup password hash and put it into the file /usr/share/postfixadmin/config.inc.php. Next, fill in the Setup password, Admin and Password and Password (again). Finally, click Add Admin to create a new admin account.
7. Go to the Postfix Admin login page at http://localhost/postfixadmin/ and login using your newly created admin account.
:)
Fedora / Redhat / CentOS Install Memcached Caching System
Required Packages
- memcached : High Performance, Distributed Memory Object Cache.
- memcached-selinux : SELinux policy module supporting memcached.
- perl-Cache-Memcached : Perl client for memcached.
- php-pecl-memcache : Php client / extension to work with the Memcached caching daemon.
- python-memcached : A Python memcached client library.
Step # 1: Turn on EPEL Repo
Type the following command to enable EPEL repo which carries required memcache packages.rpm -Uvh http://download.fedora.redhat.com/pub/epel/5/i386/epel-release-5-3.noarch.rpm.Step # 2: Install memcached
Type the following command to install memcached with php extension:# yum install memcached php-pecl-memcache Step # 3: Configure memcached Edit /etc/sysconfig/memcached, enter:
# vi /etc/sysconfig/memcachedUpdate it as follows:
PORT="11211" USER="memcached" # max connection 2048 MAXCONN="2048" # set ram size to 2048 - 2GiB CACHESIZE="4096" # listen to loopback ip 127.0.0.1, for network connection use real ip e.g., 10.0.0.4 OPTIONS="-l 127.0.0.1"The above will starts memcached up as a daemon, using 4GB of memory, and listening on IP 127.0.0.1, port 11211. Save and close the file.
Step # 4: Run memcached
Type the following command to start memcached, enter:# chkconfig memcached on
# service memcached startTo stop / restart use the following commands:
# service memcached stop
# service memcached restartHow Do I See Memory Memcached Slabs?
Type the following command:# memcached-tool IP_ADDRESS:Port
# memcached-tool IP_ADDRESS:Port display
# memcached-tool 127.0.0.1:11211# Item_Size Max_age 1MB_pages Count Full? 1 104 B 5134 s 1 10 no 2 136 B 5135 s 1 40 no 3 176 B 0 s 1 0 no 4 224 B 2648 s 1 7 no 8 552 B 1810 s 1 12 no 9 696 B 1810 s 1 6 no 10 872 B 2935 s 1 8 no 11 1.1 kB 4262 s 1 18 no 12 1.3 kB 2990 s 1 23 no 13 1.7 kB 2434 s 1 22 no 14 2.1 kB 3489 s 1 11 no 15 2.6 kB 2964 s 1 16 no 16 3.3 kB 2861 s 1 14 no 17 4.1 kB 2076 s 1 5 no 18 5.2 kB 2981 s 1 5 no 20 8.1 kB 64 s 1 1 no 21 10.1 kB 1865 s 1 3 no 29 60.2 kB 1550 s 1 2 no
How Do I See Memory Memcached Stats?
Type the following command:# memcached-tool IP_Address:Port stats
# memcached-tool 127.0.0.1:11211 stats#127.0.0.1:11211 Field Value
accepting_conns 1
bytes 399395
bytes_read 504797
bytes_written 17313658
cmd_flush 0
cmd_get 1141
cmd_set 248
connection_structures 9
curr_connections 5
curr_items 205
evictions 0
get_hits 898
get_misses 243
limit_maxbytes 1073741824
listen_disabled_num 0
pid 40159
pointer_size 64
rusage_system 0.227965
rusage_user 0.034994
threads 5
time 1255803547
total_connections 344
total_items 259
uptime 5829
version 1.2.8
Sunday, October 24, 2010
Find out non-system users
alias lsusers='getent passwd | tr ":" " " | awk "\$3 >= $(grep UID_MIN /etc/login.defs | cut -d " " -f 2) { print \$1 }" | sort'
Above command to list non-system users. It should be portable though won't work on systems without the getent command.
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