Useful links

Universal answer
Universal answer 2
When engineering arrives
interact with other teams
How I picture myself at my next job interview

Deciding whether to perform a risky break/fix

My thoughts sometimes

That moment when you realize ....

Working on the wrong server

And finaly

FTP access-2

Като алтернативно решение на това
Изискванията са същите :
1.Admin has full access in the relevant section(s) - means read/write/rename/move/delete/overwrite
2.Guest access means read only
3.User access means read/write only (write means NOT overwrite)

И без това предният път с pure-ftpd явно нещо грешно съм описал та не можех да го възпроизведа отново затова новият solution е на базата на proftpd (10х бат Ицо)
Ограниченията ca user <-> command
Основният списък с командите : RawFTP 
Пълен такъв: RFC 959  - баси протокол на 28 години (от 1985-та) и user-ите още си го искат/търсят

1. mkdir /home/ftp
2. chmod -R 777 /home/ftp
3. useradd ftp_admin ;  passwd ftp_admin ; useradd upload ; passwd upload ; useradd guest ; passwd guest
4. apt-get install proftpd-basic
5. cat /etc/proftpd/proftpd.conf
   ModulePath /usr/lib/proftpd
   LoadModule mod_ctrls_admin.c
   #LoadModule mod_tls.c
   LoadModule mod_radius.c
   LoadModule mod_quotatab.c
   LoadModule mod_quotatab_file.c
   LoadModule mod_quotatab_radius.c
   LoadModule mod_wrap.c
   LoadModule mod_rewrite.c
   LoadModule mod_load.c
   LoadModule mod_ban.c
   LoadModule mod_wrap2.c
   LoadModule mod_wrap2_file.c
   LoadModule mod_dynmasq.c
   LoadModule mod_exec.c
   LoadModule mod_shaper.c
   LoadModule mod_ratio.c
   LoadModule mod_site_misc.c
   LoadModule mod_facl.c
   LoadModule mod_unique_id.c
   ServerType standalone
   DefaultServer on
   Umask 022
   ServerName "0.0.0.0"
   ServerIdent on "DMT FTP Server"
   ServerAdmin sysadmin@playbox.tv
   IdentLookups off
   UseReverseDNS off
   Port 21
   PassivePorts 49152 65534
   #MasqueradeAddress None
   TimesGMT off
   MaxInstances 30
   MaxLoginAttempts 3
   TimeoutLogin 300
   TimeoutNoTransfer 120
   TimeoutIdle 120
   DisplayLogin welcome.msg
   DisplayChdir .message
   User nobody
   Group nogroup
   DirFakeUser off nobody
   DirFakeGroup off nogroup
   
   DefaultTransferMode binary
   AllowForeignAddress off
   AllowRetrieveRestart on
   AllowStoreRestart on
   DeleteAbortedStores off
   #TransferRate RETR 220
   #TransferRate STOR 250
   #TransferRate STOU 250
   #TransferRate APPE 250
   
   SystemLog /var/log/proftpd/system.log
   # Log file/dir access
   ExtendedLog /var/log/proftpd/access_log WRITE,READ
   # Record all logins
   ExtendedLog /var/log/proftpd/auth_log AUTH
   # Paranoia logging level....
   ExtendedLog /var/log/proftpd/paranoid_log ALL
   
   RequireValidShell off
   
   Ratios off
   SaveRatios off
   RatioFile "/restricted/proftpd_ratios"
   RatioTempFile "/restricted/proftpd_ratios_temp"
   CwdRatioMsg "Please upload first!"
   FileRatioErrMsg "FileRatio limit exceeded, upload something first..."
   ByteRatioErrMsg "ByteRatio limit exceeded, upload something first..."
   LeechRatioMsg "Your ratio is unlimited."
   
     AllowUser guest
     AllowUser uploader
     AllowUser ftp_admin
     DenyALL
   
   
   User guest
   Group guest
   AnonRequirePassword on
   MaxClients 20 "The server is full, hosting %m users"
   DisplayLogin welcome.msg
   DisplayChdir .msg
   
   Allow from All
   Deny from all
   AllowOverwrite off
   
    AllowAll
   
    DenyAll
   
   
   User uploader
   Group uploader
   AnonRequirePassword on
   MaxClients 20 "The server is full, hosting %m users"
   DisplayLogin welcome.msg
   DisplayChdir .msg
   
   Allow from All
   Deny from all
   AllowOverwrite off
   
    AllowAll
   
    DenyAll
   
   
   User ftp_admin
   Group ftp_admin
   AnonRequirePassword on
   MaxClients 10 "The server is full, hosting %m users"
   DisplayLogin welcome.msg
   DisplayChdir .msg
   
   Allow from All
   Deny from all
   AllowOverwrite on
   
    AllowAll
   
    DenyAll