necessaryEvil from nowOn

2015-02-25

2015-02-12

NFS Server & Client

On NFS server (IP: 192.168.0.103) shared a writable folder /nfsdata to everyone under IP subnet 192.168.0.0/24

Server

# mkdir /nfsdata
# chmod 777 /nfsdata
# vi /etc/exports

/nfsdata 192.168.0.0/24(rw,sync)

# service nfs restart

Client

# showmount -e 192.168.0.103

Export list for 192.168.0.103:
/nfsdata 192.168.0.0/24

# mkdir /mnt/nfs
# mount 192.168.0.103:/nfsdata /mnt/nfs
# cp /etc/passwd /mnt/nfs

An other way to auto connect with NFS server when Client boot up.

# vi /etc/fstab

192.168.0.103:/nfsdata /mnt/nfs nfs default,soft,intr,timeo=1 0 0

# mount /mnt/nfs
# reboot

More message for Login.

For local login.
(Default content)

# vi /etc/issue

Fedora Core release 4 (Stentz)
Kernel \r on an \m

For remote login.

# vi /etc/issue.net

Welcome message after get success login.

# vi /etc/motd

Tune on [NumLock] by default.

Add following on bottom on file rc.sysinit, and reboot the Linux.

Step-1:

# vi /etc/rc.d/rc.sysinit

Step-2:

for tty in /dev/tty[1-9]*; do setleds -D +num < $tty
done

Step-3:

# reboot

2014-12-26

TCL, INFO exists

info exists 檢查變數是否存在.
例如 incr 指令的使用, 變數需先建立才能為變數進行加法運算. 此時可使用 info exists 先確認此變數是否存在, 再續程式.


if { ![ info exists counter ] } {

         set counter 0

} else {

         incr counter

}

TCL, File - Get file path

[Condition]

filename: test.tcl
file path: C:/02-MTS/99-Trainning/12-info/


set appPath [ file normalize [ info script ] ]



if { [file type $appPath ] == "link" } {

      set appPath [ file readlink $appPath ]

}



puts $appPath

[Program Output]

C:/02-MTS/99-Trainning/12-info/test.tcl

2014-12-10

Disable daemon of Smartd to speed up boot process.

What is Smartd: Smartd does hard drive reliability monitoring.

Turn it to OFF

Example OS: CentOS 4.2 with Kernel 2.6.9-22 EL

# chkconfig smartd --list

smartd 0:off 1:off 2:on 3:on 4:on 5:on 6:off

# chkconfig smartd off
# chkconfig smartd --list

smartd 0:off 1:off 2:off 3:off 4:off 5:off 6:off

2014-12-04

2014-11-27

Sublime Text 3, How to see her in detail?

Content List:

A. PASTE Multiple Texts
B. MOVE Middle Texts
C. MOVE Forward Multiple Lines