구름 속 지식

shc는 파일 내용을 공개하기가 껄끄러울 때, 파일 안의 내용을 바이너리로 변경해 주는 명령어이다.

설치 및 사용 방법은 아래 링크를 참고 하시기 바랍니다.

http://www.thegeekstuff.com/2012/05/encrypt-bash-shell-script/

<...중략...>

mprotect(0x3b6db8a000, 16384, PROT_READ) = 0
mprotect(0x3b6d21f000, 4096, PROT_READ) = 0
munmap(0x7ff4eb76e000, 43170)           = 0
clone(child_stack=0, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x7ff4eb76c9d0) = 10241
wait4(10241, ./test.pl.x: Operation not permitted
 <unfinished ...>
+++ killed by SIGKILL +++
Killed

#

# lsattr ./test.pl
-------------e- ./test.pl

속성 걸린 것이 없다.(e는 ext4를 나타내는 것이니 무시하자. 필자의 OS는 centos 6.5이고 ext4환경이다.)

    -e %s  Expiration date in dd/mm/yyyy format [none]
    -m %s  Message to display upon expiration ["Please contact your provider"]
    -f %s  File name of the script to compile
    -i %s  Inline option for the shell interpreter i.e: -e
    -x %s  eXec command, as a printf format i.e: exec('%s',@ARGV);
    -l %s  Last shell option i.e: --
    -r     Relax security. Make a redistributable binary
    -v     Verbose compilation
    -D     Switch ON debug exec calls [OFF]
    -T     Allow binary to be traceable [no]
    -C     Display license and exit
    -A     Display abstract and exit
    -h     Display help and exit

    Environment variables used:
    Name    Default  Usage
    CC      cc       C compiler command
    CFLAGS  <none>   C compiler flags

여기서 나의 눈에 들어 오는 것이
-r , -T 이었다.

shc -r -v -T -f ./test.pl

<...중략...>

rt_sigaction(SIGIO, NULL, {SIG_DFL, [], 0}, 8) = 0
rt_sigaction(SIGSYS, NULL, {SIG_DFL, [], 0}, 8) = 0
close(3)                                = 0
exit_group(0)                           = ?

#

tcp        0      0 :::5989                     :::*                        LISTEN      13653/sfcbd

/etc/init.d/sblim-sfcb stop

( time dig naver.com ) 2> /tmp/output.txt

{ time dig naver.com ; } 2> /tmp/output.txt

※ 2> 붙여주어야 한다.
    2 > 띄우면 -bash: syntax error near unexpected token `2' 라는 에러가 출력이 된다.

cdefs.h 헤더파일이 없어서 확인해 보니 /usr/include/ 디렉토리에 해당 파일이 없었다.

그래서 yum으로 glibc-headers 패키지를 설치 진행하다가

ERROR with rpm_check_debug vs depsolve

에러 문구가 표시 되었다.

Dependencies Resolved

=============================================================================
 Package                 Arch       Version          Repository        Size
=============================================================================
Updating:
 glibc                   x86_64     2.5-118.el5_10.2  updates           4.8 M
 glibc                   i686       2.5-118.el5_10.2  updates           5.4 M
 glibc-common            x86_64     2.5-118.el5_10.2  updates            16 M
 glibc-headers           x86_64     2.5-118.el5_10.2  updates           602 k
Updating for dependencies:
 glibc-devel             x86_64     2.5-118.el5_10.2  updates           2.4 M
 nscd                    x86_64     2.5-118.el5_10.2  updates           177 k

Transaction Summary
=============================================================================
Install      0 Package(s)
Update       6 Package(s)
Remove       0 Package(s)

Total download size: 30 M
Is this ok [y/N]: y
Downloading Packages:
Running rpm_check_debug
ERROR with rpm_check_debug vs depsolve:
Package glibc-devel needs glibc-headers = 2.5-49.el5_5.7, this is not available.
Package glibc-devel needs glibc-headers = 2.5-49.el5_5.7, this is not available.
Package glibc-devel needs glibc = 2.5-49.el5_5.7, this is not available.
Package glibc-devel needs glibc = 2.5-49.el5_5.7, this is not available.
Complete!

필자는 맨 마지막 complete 단어만 보고 설치되었는 줄 알았는데 더 자세치 보니 설치 실패였다.

해결 방법

1) yum clean all

2) yum update yum

3) yum install glibc-headers

4) 설치 완료

http://www.tuxera.com/community/ntfs-3g-download/

./configure
make
make install

mount -t ntfs-3g /dev/sdc1 /mnt/windows

max_allowed_packet = 1000M
bulk_insert_buffer_size = 256M
key_buffer_size = 500M =>이거는 서버 전체 메모리에 60%정도 할당해도 된다.

# free
             total       used       free     shared    buffers     cached
Mem:      16359780    9157224    7202556          0     201912    6396404
-/+ buffers/cache:    2558908   13800872
Swap:      3911816        160    3911656

Memory size ≒MemFree + Inactive

# cat /proc/meminfo
MemTotal:     16359780 kB
MemFree:       7202556 kB
Buffers:        201912 kB
Cached:        6396404 kB
SwapCached:          0 kB
Active:        2578320 kB
Inactive:      6149700 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:     16359780 kB
LowFree:       7202556 kB
SwapTotal:     3911816 kB
SwapFree:      3911656 kB
Dirty:             108 kB
Writeback:           0 kB
AnonPages:     2129660 kB
Mapped:          57756 kB
Slab:           383820 kB
PageTables:      15708 kB
NFS_Unstable:        0 kB
Bounce:              0 kB
CommitLimit:  12091704 kB
Committed_AS:  3042920 kB
VmallocTotal: 34359738367 kB
VmallocUsed:    265072 kB
VmallocChunk: 34359472959 kB
HugePages_Total:     0
HugePages_Free:      0
HugePages_Rsvd:      0
Hugepagesize:     2048 kB

# ./bin/mysql_secure_installation  ==>mysql홈디렉토리에서 실행해야 하니 주의하세요




NOTE: RUNNING ALL PARTS OF THIS SCRIPT IS RECOMMENDED FOR ALL MySQL
      SERVERS IN PRODUCTION USE!  PLEASE READ EACH STEP CAREFULLY!


In order to log into MySQL to secure it, we'll need the current
password for the root user.  If you've just installed MySQL, and
you haven't set the root password yet, the password will be blank,
so you should just press enter here.

Enter current password for root (enter for none):  ==> 현재 mysql 패스워드를 묻네요..전 초기 설치하여 그냥 엔터로 패스
OK, successfully used password, moving on...

Setting the root password ensures that nobody can log into the MySQL
root user without the proper authorisation.

Set root password? [Y/n] y ==> mysql root 패스워드를 설정할지 묻는다. 당연히 yes
New password:
Re-enter new password:
Password updated successfully!
Reloading privilege tables..
 ... Success!


By default, a MySQL installation has an anonymous user, allowing anyone
to log into MySQL without having to have a user account created for
them.  This is intended only for testing, and to make the installation
go a bit smoother.  You should remove them before moving into a
production environment.

Remove anonymous users? [Y/n] y ==> 익명사용자  사용 삭제? 당연히 Yes
 ... Success!

Normally, root should only be allowed to connect from 'localhost'.  This
ensures that someone cannot guess at the root password from the network.

Disallow root login remotely? [Y/n] y  ==> mysql 원격 접속 권한 제한. 일단 막고 보자
 ... Success!

By default, MySQL comes with a database named 'test' that anyone can
access.  This is also intended only for testing, and should be removed
before moving into a production environment.

Remove test database and access to it? [Y/n] y ==>test DB를 삭제할 것인지 묻는다. 나중에 테스트 DB만들어도 되니 일단 삭제
 - Dropping test database...
 ... Success!
 - Removing privileges on test database...
 ... Success!

Reloading the privilege tables will ensure that all changes made so far
will take effect immediately.

Reload privilege tables now? [Y/n] y
 ... Success!

Cleaning up...



All done!  If you've completed all of the above steps, your MySQL
installation should now be secure.

Thanks for using MySQL!

<?php

$Name = "YDS"; //senders name
$email = "abc@test.com"; //senders e-mail adress
$recipient = "abcd@test2.com"; //recipient
$mail_body = "Test..."; //mail body
$subject = "Subject for reviever"; //subject
$content="test";
$header = "From: ". $Name . " <" . $email . ">\r\n"; //optional headerfields

mail($recipient, $subject, $mail_body, $header); //mail command :)

 $result=mail($recipient, $subject, $content);
 if($result){
  echo "mail success";
  }else  {

  //error_log($mailto, 0);

  echo "mail fail";
 }
?>