Server tips v1.1

=======Tips:
=======Distros:
=======Server software:
=======System administration software:


=======Tips:
TIP 1: Use dupeGuru or Fdupes to look for duplicate files.
TIP 2: If you want a file server SSH already ships with SFTP, and there is SSHFS to mount remotely.
TIP 3: Kodi can run on the framebuffer (no window manager, less dependencies, less overheat) installing the appropriate package (kodi-fbdev).
TIP 4: Transmission has a daemon and several types of CLI frontends for running headless. Or you can use GNU Screen on the remote machine for closing the terminal but not the application, just remember to disable the flashing bell.
TIP 5: Careful with drives that have an UDF/VCD UDF filesystem, is almost invisible and almost impossible to erase, the only way to know they are there is by an inexplicable used space. They can be used to hide malware.
TIP 6: For SSH use keys and disable user:password auth

=======Distros:
For media server: LibreELEC. Runs Kodi and nothing else.
For NAS: OpenMediaVault. Better hardware support than FreeNAS.
For containers: Proxmox.
For firewalls: IPFire.

=======Server software:
BBS Server: Mystic BBS, Synchronet
Compiling Speeding Up: ccache, distcc
Decentralized Social Network: MediaGoblin, GNU social
Direct Connect Server: uhub
DLNA: ReadyMedia (a.k.a. MiniDLNA), Universal Media Server
E-Mail: Exim + Dovecot (with procmail for filtering)
FTP: vsftpd
Honeypot: LaBrea, Nova, Honeyperl
IRC: ngIRCd, InspIRCd
IRC Fileserver (filesharing): iroffer
IRC bouncer: ZNC
MUD: PennMUSH
Music Player (and server): MOC (Music On Console), MPD (with vimus/ncmpcpp)
Proxy: Tinyproxy
Search Engine: YaCy, Searx
Torrent Search Engine: magnetico
Usenet Server: Leafnode, InterNetNews
VPN: WireGuard
Web Cache (accelerator): Squid
Web Server(lightweight, simple): GNU Libmicrohttpd, darkhttpd
Video Player (on the console): MPlayer, VLC (nvlc)
VoIP: Linphone
Volunteer Computing (donate CPU time to science): BOINC (+ boinctui)

=======System administration software:
Backup: Rsync
Batch Renamer: qmv (renameutils)
Duplicate Files Removal: Fdupes
File Archiver (simplified): Atool
File Manager: Midnight Commander, Ranger
Drive Profiling: Smartmontools, hdparm
Filesystem Benchmark: MBW, Bonnie
General Benchmarking: HPC Challenge Benchmark, Sysbench, ProcBench
Network Profiling: iperf
Power Management: PowerTOP, TLP
System Tracing: strace
System Information: inxi, zCI
Hardware Information: dmidecode, dmesg, lshw, lspci, lsblk, blkid
Software Information: uname, lsb_release, vrms, ldd, file
Configuration Management (simple): cdist
Control Panel: Webmin
Disk Usage: Ncdu
Hardware Monitoring: lm-sensors (psensor for a GUI), Hddtemp, acpiclient
Logs: Logcheck, multiTail, lnav
Network Flow: nfdump (nfsen)
Network Latency: bmon
Network Monitoring: tcptrack, vnStat, iftop
Ports: psad
Processes: lsof
Serials: slsnif
System Latency: LatencyTOP
System Monitor: procps (ps, free, vmstat, top, pmap, nice), Sysstat (sar, mpstat, pidstat, iostat, sadf), nmon, htop, procinfo
HIDS: Tiger (with Samhain and chkrootkit)
Firewall: nftables, iptables
Network Intrusion Detection: Suricata
Network Intrusion Prevention: Sshguard