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Centos Linux Download

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Centos Linux operating system can be downloaded from Centos Public Mirrors. Most of the download locations are at US. Current version is 6.3 now. DVD version consist of two files. CentOS-6.3-x86_64-bin-DVD1.iso and CentOS-6.3-x86_64-bin-DVD2.iso.


tmpfs size is returning old value after reboot

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On Redhat EL 6 /dev/shm is returning the old value even if it is specified in the fstab. This is because tmpfs is never remounted during the boot process. Resolution for this is simply adding remount command to /etc/rc.local file.

eg:
mount -o remount,size=5G /dev/shm

hdparm command usage example

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hdparm command should be executed with root privileges. The following is an example for cached read and buffered disk read.

# hdparm -Tt /dev/mapper/mpath1

/dev/mapper/mpath1:
Timing cached reads: 2832 MB in 2.00 seconds = 1415.46 MB/sec
Timing buffered disk reads: 74 MB in 3.10 seconds = 23.85 MB/sec

winsxs folder is large

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When viewing size of the Windows directory, users may notice that the C:\Windows\winsxs directory appears to be taking up large amounts of disk space.

LINUX BASH BUILTINS

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BASH_BUILTINS(1)      BASH_BUILTINS(1)

NAME
       bash,  :,  ., [, alias, bg, bind, break, builtin, cd, command, compgen,
       complete, continue, declare, dirs, disown, echo, enable,  eval, exec,
       exit,  export,  fc,  fg, getopts, hash, help, history, jobs, kill, let,
       local, logout, popd, printf, pushd, pwd, read, readonly, return,  set,
       shift,  shopt,  source, suspend,  test, times, trap, type, typeset,
       ulimit, umask, unalias, unset,  wait  - bash  built-in commands,  see
       bash(1)

Linux PAM.D man page

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PAM.CONF(5) Linux-PAM Manual PAM.CONF(5)

NAME
pam.conf, pam.d - PAM configuration files

An Evening with MongoDB - Orlando

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An evening with MongoDB Orlando is a free evening event dedicated to the open source, non-relational database MongoDB.

An Evening with MongoDB - Orlando
September 6th Orlando, FL