Linux Conquering Cloud

Step1:
vi /etc/fstab
none /tmp tmpfs nodev,nosuid,noexec
none /var/tmp tmpfs nodev,nosuid,noexec
--------------------------------------------------------
Change the "noexec" to "exec"

none /tmp tmpfs nodev,nosuid,exec
none /var/tmp tmpfs nodev,nosuid,exec

:wq

Step2: Restart the VPS from node

Step 3:
pecl install mailparse
root@web1 [~]# pecl install mailparse
downloading mailparse-2.1.5.tgz ...
Starting to download mailparse-2.1.5.tgz (37,332 bytes)
..........done: 37,332 bytes
9 source files, building
running: phpize
Configuring for:
PHP Api Version: 20041225
Zend Module Api No: 20060613
Zend Extension Api No: 220060519
building in /var/tmp/pear-build-root/mailparse-2.1.5
running: /root/tmp/pear/mailparse/configure
checking for egrep... grep -E
checking for a sed that does not truncate output... /bin/sed
checking for cc... cc
checking for C compiler default output file name... a.out
checking whether the C compiler works... yes
checking whether we are cross compiling... no
checking for suffix of executables...
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether cc accepts -g... yes
checking for cc option to accept ANSI C... none needed
checking how to run the C preprocessor... cc -E
checking for icc... no
checking for suncc... no
checking whether cc understands -c and -o together... yes
checking for system library directory... lib
checking if compiler supports -R... no
checking if compiler supports -Wl,-rpath,... yes
checking build system type... i686-pc-linux-gnu
checking host system type... i686-pc-linux-gnu
checking target system type... i686-pc-linux-gnu
checking for PHP prefix... /usr/local
checking for PHP includes... -I/usr/local/include/php -I/usr/local/include/php/main -I/usr/local/include/php/TSRM -I/usr/local/include/php/Zend -I/usr/local/include/php/ext -I/usr/local/include/php/ext/date/lib
checking for PHP extension directory... /usr/local/lib/php/extensions/no-debug-non-zts-20060613
checking for PHP installed headers prefix... /usr/local/include/php
checking if debug is enabled... no
checking if zts is enabled... no
checking for re2c... re2c
checking for re2c version... invalid
configure: WARNING: You will need re2c 0.13.4 or later if you want to regenerate PHP parsers.
checking for gawk... gawk
checking whether to enable mailparse support... yes, shared
checking for ld used by cc... /usr/bin/ld
checking if the linker (/usr/bin/ld) is GNU ld... yes
checking for /usr/bin/ld option to reload object files... -r
checking for BSD-compatible nm... /usr/bin/nm -B
checking whether ln -s works... yes
checking how to recognize dependent libraries... pass_all
checking for ANSI C header files... yes
checking for sys/types.h... yes
checking for sys/stat.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for memory.h... yes
checking for strings.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for unistd.h... yes
checking dlfcn.h usability... yes
checking dlfcn.h presence... yes
checking for dlfcn.h... yes
checking the maximum length of command line arguments... 98304
checking command to parse /usr/bin/nm -B output from cc object... ok
checking for objdir... .libs
checking for ar... ar
checking for ranlib... ranlib
checking for strip... strip
checking if cc supports -fno-rtti -fno-exceptions... no
checking for cc option to produce PIC... -fPIC
checking if cc PIC flag -fPIC works... yes
checking if cc static flag -static works... yes
checking if cc supports -c -o file.o... yes
checking whether the cc linker (/usr/bin/ld) supports shared libraries... yes
checking whether -lc should be explicitly linked in... no
checking dynamic linker characteristics... GNU/Linux ld.so
checking how to hardcode library paths into programs... immediate
checking whether stripping libraries is possible... yes
checking if libtool supports shared libraries... yes
checking whether to build shared libraries... yes
checking whether to build static libraries... no

creating libtool
appending configuration tag "CXX" to libtool
configure: creating ./config.status
config.status: creating config.h
running: make
/bin/sh /var/tmp/pear-build-root/mailparse-2.1.5/libtool --mode=compile cc -I. -I/root/tmp/pear/mailparse -DPHP_ATOM_INC -I/var/tmp/pear-build-root/mailparse-2.1.5/include -I/var/tmp/pear-build-root/mailparse-2.1.5/main -I/root/tmp/pear/mailparse -I/usr/local/include/php -I/usr/local/include/php/main -I/usr/local/include/php/TSRM -I/usr/local/include/php/Zend -I/usr/local/include/php/ext -I/usr/local/include/php/ext/date/lib -DHAVE_CONFIG_H -g -O2 -c /root/tmp/pear/mailparse/mailparse.c -o mailparse.lo
mkdir .libs
cc -I. -I/root/tmp/pear/mailparse -DPHP_ATOM_INC -I/var/tmp/pear-build-root/mailparse-2.1.5/include -I/var/tmp/pear-build-root/mailparse-2.1.5/main -I/root/tmp/pear/mailparse -I/usr/local/include/php -I/usr/local/include/php/main -I/usr/local/include/php/TSRM -I/usr/local/include/php/Zend -I/usr/local/include/php/ext -I/usr/local/include/php/ext/date/lib -DHAVE_CONFIG_H -g -O2 -c /root/tmp/pear/mailparse/mailparse.c -fPIC -DPIC -o .libs/mailparse.o
/bin/sh /var/tmp/pear-build-root/mailparse-2.1.5/libtool --mode=compile cc -I. -I/root/tmp/pear/mailparse -DPHP_ATOM_INC -I/var/tmp/pear-build-root/mailparse-2.1.5/include -I/var/tmp/pear-build-root/mailparse-2.1.5/main -I/root/tmp/pear/mailparse -I/usr/local/include/php -I/usr/local/include/php/main -I/usr/local/include/php/TSRM -I/usr/local/include/php/Zend -I/usr/local/include/php/ext -I/usr/local/include/php/ext/date/lib -DHAVE_CONFIG_H -g -O2 -c /root/tmp/pear/mailparse/php_mailparse_mime.c -o php_mailparse_mime.lo
cc -I. -I/root/tmp/pear/mailparse -DPHP_ATOM_INC -I/var/tmp/pear-build-root/mailparse-2.1.5/include -I/var/tmp/pear-build-root/mailparse-2.1.5/main -I/root/tmp/pear/mailparse -I/usr/local/include/php -I/usr/local/include/php/main -I/usr/local/include/php/TSRM -I/usr/local/include/php/Zend -I/usr/local/include/php/ext -I/usr/local/include/php/ext/date/lib -DHAVE_CONFIG_H -g -O2 -c /root/tmp/pear/mailparse/php_mailparse_mime.c -fPIC -DPIC -o .libs/php_mailparse_mime.o
re2c -b /root/tmp/pear/mailparse/php_mailparse_rfc822.re > /root/tmp/pear/mailparse/php_mailparse_rfc822.c
/bin/sh /var/tmp/pear-build-root/mailparse-2.1.5/libtool --mode=compile cc -I. -I/root/tmp/pear/mailparse -DPHP_ATOM_INC -I/var/tmp/pear-build-root/mailparse-2.1.5/include -I/var/tmp/pear-build-root/mailparse-2.1.5/main -I/root/tmp/pear/mailparse -I/usr/local/include/php -I/usr/local/include/php/main -I/usr/local/include/php/TSRM -I/usr/local/include/php/Zend -I/usr/local/include/php/ext -I/usr/local/include/php/ext/date/lib -DHAVE_CONFIG_H -g -O2 -c /root/tmp/pear/mailparse/php_mailparse_rfc822.c -o php_mailparse_rfc822.lo
cc -I. -I/root/tmp/pear/mailparse -DPHP_ATOM_INC -I/var/tmp/pear-build-root/mailparse-2.1.5/include -I/var/tmp/pear-build-root/mailparse-2.1.5/main -I/root/tmp/pear/mailparse -I/usr/local/include/php -I/usr/local/include/php/main -I/usr/local/include/php/TSRM -I/usr/local/include/php/Zend -I/usr/local/include/php/ext -I/usr/local/include/php/ext/date/lib -DHAVE_CONFIG_H -g -O2 -c /root/tmp/pear/mailparse/php_mailparse_rfc822.c -fPIC -DPIC -o .libs/php_mailparse_rfc822.o
/bin/sh /var/tmp/pear-build-root/mailparse-2.1.5/libtool --mode=link cc -DPHP_ATOM_INC -I/var/tmp/pear-build-root/mailparse-2.1.5/include -I/var/tmp/pear-build-root/mailparse-2.1.5/main -I/root/tmp/pear/mailparse -I/usr/local/include/php -I/usr/local/include/php/main -I/usr/local/include/php/TSRM -I/usr/local/include/php/Zend -I/usr/local/include/php/ext -I/usr/local/include/php/ext/date/lib -DHAVE_CONFIG_H -g -O2 -o mailparse.la -export-dynamic -avoid-version -prefer-pic -module -rpath /var/tmp/pear-build-root/mailparse-2.1.5/modules mailparse.lo php_mailparse_mime.lo php_mailparse_rfc822.lo
cc -shared .libs/mailparse.o .libs/php_mailparse_mime.o .libs/php_mailparse_rfc822.o -Wl,-soname -Wl,mailparse.so -o .libs/mailparse.so
creating mailparse.la
(cd .libs && rm -f mailparse.la && ln -s ../mailparse.la mailparse.la)
/bin/sh /var/tmp/pear-build-root/mailparse-2.1.5/libtool --mode=install cp ./mailparse.la /var/tmp/pear-build-root/mailparse-2.1.5/modules
cp ./.libs/mailparse.so /var/tmp/pear-build-root/mailparse-2.1.5/modules/mailparse.so
cp ./.libs/mailparse.lai /var/tmp/pear-build-root/mailparse-2.1.5/modules/mailparse.la
PATH="$PATH:/sbin" ldconfig -n /var/tmp/pear-build-root/mailparse-2.1.5/modules
----------------------------------------------------------------------
Libraries have been installed in:
/var/tmp/pear-build-root/mailparse-2.1.5/modules

If you ever happen to want to link against installed libraries
in a given directory, LIBDIR, you must either use libtool, and
specify the full pathname of the library, or use the `-LLIBDIR'
flag during linking and do at least one of the following:
- add LIBDIR to the `LD_LIBRARY_PATH' environment variable
during execution
- add LIBDIR to the `LD_RUN_PATH' environment variable
during linking
- use the `-Wl,--rpath -Wl,LIBDIR' linker flag
- have your system administrator add LIBDIR to `/etc/ld.so.conf'

See any operating system documentation about shared libraries for
more information, such as the ld(1) and ld.so(8) manual pages.
----------------------------------------------------------------------

Build complete.
Don't forget to run 'make test'.

running: make INSTALL_ROOT="/var/tmp/pear-build-root/install-mailparse-2.1.5" install
Installing shared extensions: /var/tmp/pear-build-root/install-mailparse-2.1.5/usr/local/lib/php/extensions/no-debug-non-zts-20060613/
running: find "/var/tmp/pear-build-root/install-mailparse-2.1.5" | xargs ls -dils
317095524 0 drwxr-xr-x 3 root root 60 Apr 3 21:09 /var/tmp/pear-build-root/install-mailparse-2.1.5
317102717 0 drwxr-xr-x 3 root root 60 Apr 3 21:09 /var/tmp/pear-build-root/install-mailparse-2.1.5/usr
317102720 0 drwxr-xr-x 3 root root 60 Apr 3 21:09 /var/tmp/pear-build-root/install-mailparse-2.1.5/usr/local
317102723 0 drwxr-xr-x 3 root root 60 Apr 3 21:09 /var/tmp/pear-build-root/install-mailparse-2.1.5/usr/local/lib
317102726 0 drwxr-xr-x 3 root root 60 Apr 3 21:09 /var/tmp/pear-build-root/install-mailparse-2.1.5/usr/local/lib/php
317102729 0 drwxr-xr-x 3 root root 60 Apr 3 21:09 /var/tmp/pear-build-root/install-mailparse-2.1.5/usr/local/lib/php/extensions
317102732 0 drwxr-xr-x 2 root root 60 Apr 3 21:09 /var/tmp/pear-build-root/install-mailparse-2.1.5/usr/local/lib/php/extensions/no-debug-non-zts-20060613
317102772 156 -rwxr-xr-x 1 root root 150203 Apr 3 21:09 /var/tmp/pear-build-root/install-mailparse-2.1.5/usr/local/lib/php/extensions/no-debug-non-zts-20060613/mailparse.so

Build process completed successfully
Installing '/usr/local/lib/php/extensions/no-debug-non-zts-20060613/mailparse.so'
install ok: channel://pecl.php.net/mailparse-2.1.5
Extension mailparse enabled in php.ini
=================================================
Step 4:

Revert the changes in /etc/fstab
none /tmp tmpfs nodev,nosuid,noexec
none /var/tmp tmpfs nodev,nosuid,noexec

:wq

Step 5: Again restart the VPS from main node

You are done with installation......

Cpanel : JailShell : Virtfs Unmount

If you’re a sysadmin of Cpanel server, you might be aware of the JailShell. Its nothing but a User Shell with limited privileges. Users requesting for shell access to the webhosting server are provided with such shell instead of bash (Which provides root level privileges to users) .

Jailshell limits the users access to their home directory and keeps rest of the file system safe. Still there are chances of such users breaking into your system, so be sure of providing shell access to your servers. Jailshell mounts the filesystems of the users, who login via SSH under a directory called /home/virtfs. This contains users home directory and a false file system which links back to system directories like /bin, /usr etc.

NOTE: Be careful! Don’t remove any folder which is inside /home/virtfs,NEVER. As I said earlier, this folder links back to your systems root file system. You might end up screwing up your server if you attempt it.

So, we got to know that the Jailshell provides a restricted shell access to users and mounts the home directory temporarily at /home/virtfs.

Now, what if you still see the directories of different users mounted under /home/virtfs?

Right, this normally happens when users forget to logout properly from their SSH sessions. As a system admin, you’re responsible to unmount these directories safely.

How do I do that?

You can find all the virtfs mounts in /proc/mounts. Run cat /proc/mounts.

Now, its time to unmount them one by one. For that you have to take the second column of the output. Or write a simple for loop as follows.

for i in `cat /proc/mounts | grep /home/virtfs | cut -d ‘ ‘ -f 2 ` ; do umount $i ; done

If you want to unmount the virtfs of a perticular user, you can simply add an another pipe to for condition with grep username.

Now, you’re done with cleaning of your virtfs.

Linux Conquering Cloud

Pages

Monday, April 1, 2013

mailparse enable on cpanel VPS

Monday, March 25, 2013

Cpanel : JailShell : Virtfs Unmount

Cpanel : JailShell : Virtfs Unmount

Installing Google apps, configserver,whmphp,cloudflare,attractaseo,cagefs,config server mail queue ,file explorer