Archive for January, 2010

SBDavid
Jan 1st, 2010

Checking system default VM setting using sysctl

Checking system default VM setting using sysctl

Some of the VM settings for the kernel can be changed using sysctl. Here is a listing of the default settings for a system on 2.6.27

root@dell:~# sysctl -a |grep vm
vm.overcommit_memory = 0
vm.panic_on_oom = 0
vm.oom_kill_allocating_task = 0
vm.oom_dump_tasks = 0
vm.overcommit_ratio = 50
vm.page-cluster = 3
vm.dirty_background_ratio = 10
vm.dirty_ratio = 40
vm.dirty_writeback_centisecs = 499
vm.dirty_expire_centisecs = 2999
vm.nr_pdflush_threads = 2
vm.swappiness = 60
vm.nr_hugepages = 0
vm.hugetlb_shm_group = 0
vm.hugepages_treat_as_movable = 0
vm.nr_overcommit_hugepages = 0
vm.lowmem_reserve_ratio = 256 32 32
vm.drop_caches = 0
vm.min_free_kbytes = 2033
vm.percpu_pagelist_fraction = 0
vm.max_map_count = 65536
vm.laptop_mode = 0
vm.block_dump = 0
vm.vfs_cache_pressure = 100
vm.legacy_va_layout = 0
vm.stat_interval = 1
vm.mmap_min_addr = 0
vm.vdso_enabled = 2
vm.highmem_is_dirtyable = 0

SBDavid
Jan 1st, 2010

Installing C++ preprocessor in DirectAdmin

Installing C++ preprocessor in DirectAdmin

If you encounter this error message, this would imply that you do not have g++ installed:

checking whether we are using the GNU C++ compiler… no
checking whether g++ accepts -g… no
checking dependency style of g++… none
checking how to run the C++ preprocessor… /lib/cpp
*** The make has failed, do you want to try to make again? (y,n):

The gcc-c++ rpm and all it’s dependancies are required to resolve the issue.

Some dependancies include:

libstdc++-devel
libstdc++

If you have up2date, simply run:

up2date -u gcc-c++

or

yum install gcc-c++

Source include: http://directadmin.com/

SBDavid
Jan 1st, 2010

DirectAdmin is not accepting encrypted SSL key

If you have an RSA PRIVATE KEY then you would have a password encrypted key.

This will not work with DirectAdmin since it would require someone to type in a password each time apache restarts.

You do not have to start over, you can convert this password protected key into a normal key by typing:

openssl rsa -in /path/to/your/key -out /the/new/key

where you’d replace the bold values with appropriate values.

This will ask you for the password you specified when you created the original key.
It will then create a non-password-protected key that you can use for DA.

Source: http://directadmin.com/

« Prev