Linux FTP Multiple users directory change and permission set and FTP server

Linux FTP multiple users directory change and permission set
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Let we a vsftp sever in CentOS.
A user khan created and need to change ftp login path to /home/FTP-Uploads/


adduser khan
passwd khan

usermod -g root khan
chmod g=rw -R /home/FTP-Uploads/
chown -R khan /home/FTP-Uploads/

vi   /etc/passwd

khan:x:511:0::/home/FTP-Uploads/:/sbin/nologin

## Adding another user name "tayab" and give him to "FTP-Uploads" directory permission
## Multiple user in permission for one Directory
Multiples users should be in same group ..
Here I add both user "khan" and "tayab" to root group
by
usermod -g root tayab
vi /etc/group
root:x:0:khan,shakkhor

setfacl -m u:tayab:rwx -R FTP_Uploads

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Sample FTP Server  
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vi /etc/vsftpd/vsftpd.conf
=================
anonymous_enable=NO
local_enable=YES
write_enable=YES
local_umask=022
dirmessage_enable=YES
xferlog_enable=YES
connect_from_port_20=YES
xferlog_file=/var/log/vsftpd.log
xferlog_std_format=YES
ftpd_banner=Welcome to Tayab-Khan's FTP service.
listen=YES
pasv_min_port=2121
pasv_max_port=2142
pam_service_name=vsftpd
userlist_enable=YES
tcp_wrappers=YES

======================
IPtables for FTP::
-A INPUT -p tcp -m state --state NEW -m tcp -m multiport --dports 2121:2142 -j ACCEPT
-A INPUT -s 10.10.10.0/24 -p tcp -m state --state NEW -m tcp --dport 20 -j ACCEPT
-A INPUT -s 10.10.10.0/24 -p tcp -m state --state NEW -m tcp --dport 21 -j ACCEPT
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Some Commands 

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to find without hashed lines   root#   egrep -v '^(#|$)'  /etc/vsftpd/vsftpd.conf 

or                                            root#   grep -E -v '^(#|$)'  /etc/vsftpd/vsftpd.conf

to find and send outputs to another file..
 root#  sed -e '/^[ ]*#/d' -e '/^[ ]*;/d' -e '/^$/d' //etc/vsftpd/vsftpd.conf > /root/tayab-ftp-active-lines.txt

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File and Directory permission issues
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To change all the directories to 755 (drwxr-xr-x):

find /home/tayab/lampp/htdocs -type d -exec chmod 755 {} \;

To change all the files to 644 (-rw-r--r--):

find /home/tayab/lampp/htdocs -type f -exec chmod 644 {} \;

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