Major Tools for your IT Systems

A must “USE” in these insecure days: nmap Portscan Tool use nmap -PN IP-Address to check failed Firewall Settings! arp-scan  Network Scan to find active devices iftop to detect traffic and used Ports on a physical network Interface! ps aux  show active processes on a Linux System htop more human friendly Process Monitor iotop human friendly traffic monitor from CPU/RAM to Drives Daily check Error Logs! Use always Firewalls and Disk/File Encryption! Don’t trust Hardware Protection (TPM) Chips most do communicate by clean signals on copper which can be read out by hardware hacking or magnetic fields! NEVER leave Hardware […]

Reuse OLD PCs for IPFS File Cloud Blockchain

What is IPFS = Internet Planetary File System (peer-to peer) ? It’s a decentral sharing Ecosystem for Files on Blockchain Technology Why is it a current Hype? Cause it  overs many Solutions for saving files into the IPFS Blockchain Cloud with unchangeable Fingerprints by Blockchain Hashes. A Folder gets a fixed Hash Key on Uploading Data for Example: Linuxblog on IPFS worldwide accessible by: https://ipfs.io/ipfs/QmXuqCg7cmX9oxyX1LgWhu22TrHXxoKczL4ff8yJoxnwSG where the first part is the Data Gateway this can be changed to other public Gateways like: https://dweb.link/ipfs/  add here the Content Data Hash “QmXuqCg7cmX9oxyX1LgWhu22TrHXxoKczL4ff8yJoxnwSG” to (click the URL to Test): https://dweb.link/ipfs/QmXuqCg7cmX9oxyX1LgWhu22TrHXxoKczL4ff8yJoxnwSG if you upload or […]

Ubuntu Odroid Enable Boot Messages again

To see any VERY useful Kernel Boot Messages on Screen do: nano /media/boot/boot.ini then search line 9: setenv condev "console=ttyS0,115200n8" change to: setenv condev "console=ttyS0,115200n8 console=tty1" now enable Multi-User Console this disable graphic Lightdm Login Manager systemctl set-default multi-user.target Now you can debug all again.. be happy

Bug Nautilus slow SMB Performance gvfs-smb

If you use Samba as File Share (NAS) Samba mounts often hang by listing huge amount files like Photos. Known Problem is the gfvs-backend is hanging up on switching between smb protocol (smb1-2-3) versions! Faster is to use the cifs Kernel mount without the gnome-backend communication open Terminal enter: id myusername mkdir /home/myusername/nas/ with known id do: Workaround edit /etc/fstab insert: sudo nano /etc/fstab insert at the end !! //192.168.1XX.XXX/nas /home/myusername/nas cifs file_mode=0777,dir_mode=0777,username=myusername,password=XXXX,domain=home.local,uid=10XX 0 0 Now over 50MB’s per second should by possible over gigabit cable. If not needed disable Samba Logging!

Redis Monitoring command line

Open a Console to checkout the IO of the REDIS Socket on Ubuntu Linux do: redis-cli -s /var/run/redis/redis-server.sock at the Prompt enter “MONITOR” ! redis /var/run/redis/redis-server.sock > MONITOR Lines run should be seen.. like 1643798561.129268 [0 unix:/var/run/redis/redis-server.sock] "EXPIRE" "98f4dfa05f67a630e9a828ad8a7c30d9/lockfiles/5cd93670745f7ff4ef4b456cc9c8b126" "3600" 1643798561.130843 [0 unix:/var/run/redis/redis-server.sock] "INCRBY" "98f4dfa05f67a630e9a828ad8a7c30d9/lockfiles/262023e9d503ea4158010bfebc4124bd" "1" 1643798561.131158 [0 unix:/var/run/redis/redis-server.sock] "EXPIRE" "98f4dfa05f67a630e9a828ad8a7c30d9/lockfiles/262023e9d503ea4158010bfebc4124bd" "3600" 1643798561.132725 [0 unix:/var/run/redis/redis-server.sock] "INCRBY" "98f4dfa05f67a630e9a828ad8a7c30d9/lockfiles/84b5072ee7801482b6bf7d661003df87" "1" 1643798561.133044 [0 unix:/var/run/redis/redis-server.sock] "EXPIRE" "98f4dfa05f67a630e9a828ad8a7c30d9/lockfiles/84b5072ee7801482b6bf7d661003df87" "3600" 1643798561.138752 [0 unix:/var/run/redis/redis-server.sock] "WATCH" "98f4dfa05f67a630e9a828ad8a7c30d9/lockfiles/84b5072ee7801482b6bf7d661003df87" 1643798561.139097 [0 unix:/var/run/redis/redis-server.sock] "GET" "98f4dfa05f67a630e9a828ad8a7c30d9/lockfiles/84b5072ee7801482b6bf7d661003df87"  

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