HowFastAll

# 리눅스 프로세스 파일 위치 찾기 ( CentOS 6 )

 1) ps -ef | grep http

   PID

 2) file /proc/PID/exe

2) file /proc/PID/cwd

* PID는 숫자

* exe 실행파일명 위치 , cwd 디렉토리 위치

# CentOS 7에서 port 열기 

- 기존의 iptables가 교체 되고 변경 된것으로 보인다. ( CentOS 7에서는 deprecated된 cmd가 많다)

# 포트가 외부에서 접속되지 않는다면 포트를 방화벽에 추가합니다.
sudo firewall-cmd --zone=public --add-port=8000/tcp --permanent

# 방화벽을 리로드합니다.
sudo firewall-cmd --reload

출처 : http://okky.kr/article/276568

# Oracle VirtualBox에서 32bit OS만 보일때는 아래 2가지를 점검

1. BIOS, Intel Virtualization Technology (Enabled)

2. Windows Features,  Hyper-V conflict ( 선택 해제 )

출처 : http://www.fixedbyvonnie.com/2014/11/virtualbox-showing-32-bit-guest-versions-64-bit-host-os/#.VmZ8Dvl96Uk

# centos7에 ftp설치 하기

1. yum install vsftpd

2. firewall-cmd --permanent --add-port=21/tcp

출처 : http://www.liquidweb.com/kb/how-to-install-and-configure-vsftpd-on-centos-7/ 

Step 2 » After installation you can find /etc/vsftpd/vsftpd.conf file which is the main configuration file for VSFTP.
Take a backup copy before making changes .
[root@krizna ~]# mv /etc/vsftpd/vsftpd.conf /etc/vsftpd/vsftpd.conf.orgNow open the file and make changes as below
[root@krizna ~]# nano /etc/vsftpd/vsftpd.confFind this line anonymous_enable=YES ( Line no : 12 ) and change value to NO to disable anonymous FTP access.
anonymous_enable=NOUncomment the below line ( Line no : 100 ) to restrict users to their home directory.
chroot_local_user=YESand add the below lines at the end of the file to enable passive mode and allow chroot writable.
allow_writeable_chroot=YES
pasv_enable=Yes
pasv_min_port=40000
pasv_max_port=40100

Step 3 » Now restart vsftpd service and make it start automatically after reboot.
[root@krizna ~]# systemctl restart vsftpd.service
[root@krizna ~]# systemctl enable vsftpd.service
Step 4 » Add FTP service in firewall to allow ftp ports .
[root@krizna ~]# firewall-cmd --permanent --add-service=ftp
[root@krizna ~]# firewall-cmd --reload

Step 5 » Setup SEinux to allow ftp access to the users home directories .
[root@krizna ~]# setsebool -P ftp_home_dir on

출처 : http://www.krizna.com/centos/setup-ftp-server-centos-7-vsftp/