Test
Networking
| Topic | Status | 2nd Round |
|---|---|---|
| DNS | Done | 50% |
| Glue records | Done | |
| DIG | Done | |
| nslookup | Done | |
| Traceroute | Done | |
| MTR | Done | |
| TCP/IP | Done | 100% |
| BGP | Done | |
| VPN | Done | |
| HTTP status codes | Done |
Linux
| Topic | Status | 2nd Round |
|---|---|---|
| What is inode number | Done | |
| Sort links vs Hard link | Done | |
| Hosts file | Done | |
| Boot process | Done | |
| Proc filesystem | Done | |
| Check CPU, Memory and HDD | Done | |
| Iptables | Done | |
| Tcpdump | Done | |
| Check IP and DNS info in Linux | Done | |
| How do you add vlan in Linux | NA | |
| What are file permission | Done | |
| https://scoutapm.com/blog/slow_server_flow_chart | Done | |
| Commands |
Others
- Linux top 100 Commands linoxide.com
- Scripts - Case Alert, VS Top 10 list Study
- VoIP Repro, WanEm Lab Study, Juniper NSM Repro Study
Commands
ulimit -a lsof | wc -l sysctl fs.file-max
TCP open connections:
lsof -i -n -P | less lsof -i -n -P | wc -l