Mayur's BLOG: October 2010

How to check command history by date/time

Posted by Mayur's BLOG 1 comments

If you want to check history of the command by date and time, you need to set following export path on the server

root@server [~]# export HISTTIMEFORMAT='%F %T '

then you will get the output of history command like given below:

root@layang [/tmp]# history | grep ls
31 2010-10-24 18:33:45 ls
33 2010-10-24 18:33:45 ls
36 2010-10-24 18:33:45 ls
64 2010-10-24 18:33:45 ls

Thats it :o)

cPanel :: Unable to locate clamd

Posted by Mayur's BLOG 1 comments

If you are not able to restart clamd on cpanel server and getting following error:

root@hazel [~]# /scripts/restartsrv_clamd
Unable to locate clamd

Please follow the steps as given below:

# Red Hat Enterprise Linux 5 / i386:
rpm -Uhv http://apt.sw.be/redhat/el5/en/i386/rpmforge/RPMS/rpmforge-release-0.3.6-1.el5.rf.i386.rpm
# Red Hat Enterprise Linux 5 / x86_64:
rpm -Uhv http://apt.sw.be/redhat/el5/en/x86_64/rpmforge/RPMS//rpmforge-release-0.3.6-1.el5.rf.x86_64.rpm

Then install it through yum:

yum install clamd

And finally restart clamd service:

/scripts/restartsrv_clamd

That's it.

Install yum

Posted by Mayur's BLOG 0 comments

This article is specific to CentOS, however the packages required for yum here are the same on other flavors

The scripts shown below install all the packages upon which yum depends for a 386 distro (Need separate 64 bit instructions)

Please note - that the version numbers of the packages WILL change as later releases come out, it is up to you to ensure that the packages used are the latest. If you find a package in this script has become deprecated, please update this page with the latest package so others do not have to search for it as well.

CentOS 4 i386

rpm -Uvh http://mirror.centos.org/centos-4/4/os/i386/CentOS/RPMS/gmp-4.1.4-3.i386.rpm
rpm -Uvh http://mirror.centos.org/centos-4/4/os/i386/CentOS/RPMS/readline-4.3-13.i386.rpm
rpm -Uvh http://mirror.centos.org/centos-4/4/os/i386/CentOS/RPMS/python-2.3.4-14.7.el4.i386.rpm
rpm -Uvh http://mirror.centos.org/centos-4/4/os/i386/CentOS/RPMS/libxml2-2.6.16-12.6.i386.rpm
rpm -Uvh http://mirror.centos.org/centos-4/4/os/i386/CentOS/RPMS/libxml2-python-2.6.16-12.6.i386.rpm
rpm -Uvh http://mirror.centos.org/centos-4/4/os/i386/CentOS/RPMS/expat-1.95.7-4.i386.rpm
rpm -Uvh http://mirror.centos.org/centos-4/4/os/i386/CentOS/RPMS/python-elementtree-1.2.6-5.el4.centos.i386.rpm
rpm -Uvh http://mirror.centos.org/centos-4/4/os/i386/CentOS/RPMS/sqlite-3.3.6-2.i386.rpm
rpm -Uvh http://mirror.centos.org/centos-4/4/os/i386/CentOS/RPMS/python-sqlite-1.1.7-1.2.1.i386.rpm
rpm -Uvh http://mirror.centos.org/centos-4/4/os/i386/CentOS/RPMS/elfutils-libelf-0.97.1-5.i386.rpm
rpm -Uvh http://mirror.centos.org/centos-4/4/os/i386/CentOS/RPMS/elfutils-0.97.1-5.i386.rpm
rpm -Uvh http://mirror.centos.org/centos-4/4/os/i386/CentOS/RPMS/rpm-4.3.3-26_nonptl.i386.rpm
rpm -Uvh http://mirror.centos.org/centos-4/4/os/i386/CentOS/RPMS/rpm-python-4.3.3-32_nonptl.i386.rpm
rpm -Uvh http://mirror.centos.org/centos-4/4/os/i386/CentOS/RPMS/python-urlgrabber-2.9.8-2.noarch.rpm
rpm -Uvh ftp://ftp.pbone.net/mirror/ftp.centos.org/4.8/os/alpha/CentOS/RPMS/centos-yumconf-4-4.5.noarch.rpm
rpm -Uvh http://mirror.centos.org/centos-4/4/os/i386/CentOS/RPMS/yum-metadata-parser-1.0-8.el4.centos.i386.rpm
rpm -Uvh http://mirror.centos.org/centos-4/4/os/i386/CentOS/RPMS/yum-2.4.3-4.el4.centos.noarch.rpm
yum -y update

Note: CentOS 4 i386 updated 20 September 2010
[edit] CentOS 4 X86_64

rpm -Uvh http://mirror.centos.org/centos/4/os/x86_64/CentOS/RPMS/gmp-4.1.4-3.x86_64.rpm
rpm -Uvh http://mirror.centos.org/centos/4/os/x86_64/CentOS/RPMS/readline-4.3-13.x86_64.rpm
rpm -Uvh http://mirror.centos.org/centos/4/os/x86_64/CentOS/RPMS/python-2.3.4-14.7.el4.x86_64.rpm
rpm -Uvh http://mirror.centos.org/centos/4/os/x86_64/CentOS/RPMS/libxml2-2.6.16-12.x86_64.rpm
rpm -Uvh http://mirror.centos.org/centos/4/os/x86_64/CentOS/RPMS/libxml2-python-2.6.16-12.x86_64.rpm
rpm -Uvh http://mirror.centos.org/centos/4/os/x86_64/CentOS/RPMS/expat-1.95.7-4.x86_64.rpm
rpm -Uvh http://mirror.centos.org/centos/4/os/x86_64/CentOS/RPMS/python-elementtree-1.2.6-5.el4.centos.x86_64.rpm
rpm -Uvh http://mirror.centos.org/centos/4/os/x86_64/CentOS/RPMS/sqlite-3.3.6-2.x86_64.rpm
rpm -Uvh http://mirror.centos.org/centos/4/os/x86_64/CentOS/RPMS/python-sqlite-1.1.7-1.2.1.x86_64.rpm
rpm -Uvh http://mirror.centos.org/centos/4/os/x86_64/CentOS/RPMS/elfutils-libelf-0.97.1-5.x86_64.rpm
rpm -Uvh http://mirror.centos.org/centos/4/os/x86_64/CentOS/RPMS/elfutils-0.97.1-5.x86_64.rpm
rpm -Uvh http://mirror.centos.org/centos/4/os/x86_64/CentOS/RPMS/rpm-4.3.3-26_nonptl.x86_64.rpm
rpm -Uvh http://mirror.centos.org/centos/4/os/x86_64/CentOS/RPMS/rpm-python-4.3.3-26_nonptl.x86_64.rpm
rpm -Uvh http://mirror.centos.org/centos/4/os/x86_64/CentOS/RPMS/python-urlgrabber-2.9.8-2.noarch.rpm
rpm -Uvh ftp://ftp.pbone.net/mirror/ftp.centos.org/4.8/os/alpha/CentOS/RPMS/centos-yumconf-4-4.5.noarch.rpm
rpm -Uvh http://mirror.centos.org/centos/4/os/x86_64/CentOS/RPMS/yum-metadata-parser-1.0-8.el4.centos.x86_64.rpm
rpm -Uvh http://mirror.centos.org/centos/4/os/x86_64/CentOS/RPMS/yum-2.4.3-4.el4.centos.noarch.rpm
yum -y update

Note: CentOS 4 X86_64 updated 20 September 2010
[edit] CentOS 5 i386

rpm -Uvh http://mirror.centos.org/centos-5/5/os/i386/CentOS/elfutils-libs-0.137-3.el5.i386.rpm
rpm -Uvh http://mirror.centos.org/centos-5/5/os/i386/CentOS/gmp-4.1.4-10.el5.i386.rpm
rpm -Uvh http://mirror.centos.org/centos-5/5/os/i386/CentOS/readline-5.1-3.el5.i386.rpm
rpm -Uvh http://mirror.centos.org/centos-5/5/os/i386/CentOS/python-2.4.3-27.el5.i386.rpm
rpm -Uvh http://mirror.centos.org/centos-5/5/os/i386/CentOS/python-iniparse-0.2.3-4.el5.noarch.rpm
rpm -Uvh http://mirror.centos.org/centos-5/5/os/i386/CentOS/libxml2-2.6.26-2.1.2.8.i386.rpm
rpm -Uvh http://mirror.centos.org/centos-5/5/os/i386/CentOS/libxml2-python-2.6.26-2.1.2.8.i386.rpm
rpm -Uvh http://mirror.centos.org/centos-5/5/os/i386/CentOS/expat-1.95.8-8.3.el5_4.2.i386.rpm
rpm -Uvh http://mirror.centos.org/centos-5/5/os/i386/CentOS/python-elementtree-1.2.6-5.i386.rpm
rpm -Uvh http://mirror.centos.org/centos-5/5/os/i386/CentOS/sqlite-3.3.6-5.i386.rpm
rpm -Uvh http://mirror.centos.org/centos-5/5/os/i386/CentOS/python-sqlite-1.1.7-1.2.1.i386.rpm
rpm -Uvh http://mirror.centos.org/centos-5/5/os/i386/CentOS/elfutils-0.137-3.el5.i386.rpm
rpm -Uvh http://mirror.centos.org/centos-5/5/os/i386/CentOS/rpm-python-4.4.2.3-18.el5.i386.rpm
rpm -Uvh http://mirror.centos.org/centos-5/5/os/i386/CentOS/m2crypto-0.16-6.el5.6.i386.rpm
rpm -Uvh http://mirror.centos.org/centos-5/5/os/i386/CentOS/python-urlgrabber-3.1.0-5.el5.noarch.rpm
rpm -Uvh http://mirror.centos.org/centos-5/5/os/i386/CentOS/yum-metadata-parser-1.1.2-3.el5.centos.i386.rpm
wget http://mirror.centos.org/centos-5/5/os/i386/CentOS/yum-fastestmirror-1.1.16-14.el5.centos.1.noarch.rpm
wget http://mirror.centos.org/centos-5/5/os/i386/CentOS/yum-3.2.22-26.el5.centos.noarch.rpm
rpm -Uvh yum-*.rpm
yum -y update

Note: Updated 3 September 2010 by David Rummel

* Changed to make it work as one big copy&paste command. (Hint: If it doesn't work later on, look for updated packages)

* If you get some complaints about rpm and maybe popt, you might need to use the --nodeps option to get the dependencies right.

[edit] CentOS 5 x86_64

rpm -Uvh http://mirror.centos.org/centos/5/os/x86_64/CentOS/gmp-4.1.4-10.el5.x86_64.rpm
rpm -Uvh http://mirror.centos.org/centos/5/os/x86_64/CentOS/readline-5.1-3.el5.x86_64.rpm
rpm -Uvh http://mirror.centos.org/centos/5/os/x86_64/CentOS/python-2.4.3-27.el5.x86_64.rpm
rpm -Uvh http://mirror.centos.org/centos/5/os/x86_64/CentOS/libxml2-2.6.26-2.1.2.8.x86_64.rpm
rpm -Uvh http://mirror.centos.org/centos/5/os/x86_64/CentOS/libxml2-python-2.6.26-2.1.2.8.x86_64.rpm
rpm -Uvh http://mirror.centos.org/centos/5/os/x86_64/CentOS/expat-1.95.8-8.3.el5_4.2.x86_64.rpm
rpm -Uvh http://mirror.centos.org/centos/5/os/x86_64/CentOS/python-elementtree-1.2.6-5.x86_64.rpm
rpm -Uvh http://mirror.centos.org/centos/5/os/x86_64/CentOS/sqlite-3.3.6-5.x86_64.rpm
rpm -Uvh http://mirror.centos.org/centos/5/os/x86_64/CentOS/python-sqlite-1.1.7-1.2.1.x86_64.rpm
rpm -Uvh http://mirror.centos.org/centos/5/os/x86_64/CentOS/elfutils-libelf-0.137-3.el5.x86_64.rpm
rpm --nodeps -Uvh http://mirror.centos.org/centos/5/os/x86_64/CentOS/elfutils-0.137-3.el5.x86_64.rpm
rpm --nodeps -Uvh http://mirror.centos.org/centos/5/os/x86_64/CentOS/rpm-4.4.2.3-18.el5.x86_64.rpm
rpm -Uvh http://mirror.centos.org/centos/5/os/x86_64/CentOS/rpm-python-4.4.2.3-18.el5.x86_64.rpm
rpm -Uvh http://mirror.centos.org/centos/5/os/x86_64/CentOS/m2crypto-0.16-6.el5.6.x86_64.rpm
rpm -Uvh http://mirror.centos.org/centos/5/os/x86_64/CentOS/python-urlgrabber-3.1.0-5.el5.noarch.rpm
rpm -Uvh http://mirror.centos.org/centos/5/os/x86_64/CentOS/yum-metadata-parser-1.1.2-3.el5.centos.x86_64.rpm
rpm -Uvh http://mirror.centos.org/centos/5/os/x86_64/CentOS/python-iniparse-0.2.3-4.el5.noarch.rpm
rpm --nodeps -Uvh http://mirror.centos.org/centos/5/os/x86_64/CentOS/yum-fastestmirror-1.1.16-14.el5.centos.1.noarch.rpm
rpm -Uvh http://mirror.centos.org/centos/5/os/x86_64/CentOS/yum-3.2.22-26.el5.centos.noarch.rpm
yum -y update

Please note that sometime you may get dependencies failed error that time just use rpm --nodeps.

For exa :: rpm --nodeps -Uvh http://mirror.centos.org/centos/5/os/x86_64/CentOS/rpm-python-4.4.2.3-18.el5.x86_64.rpm

(28)No space left on device: Couldn't create accept lock

Posted by Mayur's BLOG 0 comments

On a cPanel dedicated server, apache server failed to start. So, while checking the apache logs found this:

==> /usr/local/apache/logs/error_log <==

[Sat Dec 20 01:12:27 2008]
[notice] suEXEC mechanism enabled (wrapper: /usr/local/apache/bin/suexec)

[Sat Dec 20 01:12:27 2008]
[warn] pid file /usr/local/apache/logs/httpd.pid overwritten -- Unclean shutdown of previous Apache run?

[Sat Dec 20 01:12:27 2008]
[emerg] (28)No space left on device: Couldn't create accept lock

Solution:
First of all make sure your server is not out of space. This can be checked with the command:

root# df –h

Now, to check how many semaphores are currently in use the command is:

root# ipcs -s

When the apache (httpd) is stopped, to kill the semaphores ID the command is:

root# ipcrm –s

To kill all the semaphores ID , you can achieve this by doing it in a for loop, the command is:

root# for semid in `ipcs -s | grep nobody | cut -f2 -d" "`; do ipcrm -s $semid; done

Note: “nobody” is apache user.
Now start apache with the command:

root# service httpd restart

This has fixed the issue for us.

Mayur's BLOG

How to check command history by date/time

cPanel :: Unable to locate clamd

Install yum

(28)No space left on device: Couldn't create accept lock

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