Quick Network Scan nmap -sn 192.168.0.0/24 OS detection with verbosity (-O -v) nmap -O -v 192.168.0.0/24 OS detection with verbosity and version scan (-sV -O -v) nmap -sV -O -v 192.168.0.0/24 Rogue DHCP server discovery nmap –script broadcast-dhcp-discover -e bond0 … Continue reading →
A quick synopsis on setting up a Cisco ASA and a Centos 6 or 7 system to use SNMP v3 to be monitored by Cacti Cisco ASA en conf t # create a snmp-server group (needed for SNMP v3) # … Continue reading →
If you are dork like me and like to see what is going on when your linux system boots (rather than a swirling circle) Excute sed s/rhgb//g -i.backup /etc/default/grub grub2-mkconfig -o /boot/grub2/grub.cfg and reboot Tested on Rocky 8
Continue reading →You ssh to some remote system (usually across the internet) step away from your keyboard for a few minutes, and the session gets dropped. The problem may be resolved by sending more keep alive packets You can fix this by … Continue reading →
I have a file like the following this thing that thing this stuff that stuff I want it to read this thing that thing this stuff that stuff To fix it cat file.txt | sed ‘N;s/\nthat/ that/g’
Continue reading →I have a fedora machine set up to backup configs and information from other servers via scp. In the daily log watch report I am getting tons of Received disconnect from some.ip.add.ress port someport:11: : 1 Time For some reason … Continue reading →
Instead of: [fu@bar ~]$ history … 990 nmap 10.9.6.0/24 991 history 992 less ~/.bash_history 993 ls -ltra 994 less ~/.lesshst 995 cd .config/ 996 ls -ltra 997 exit 998 ssh webserver 999 exit 1000 history Do this: [fu@bar ~]$ export … Continue reading →
You want to set up a crontab where something happens every weekday morning, i.e. 8 am every Monday, Tuesday, Wednesday, Thursday, and Friday in January from the 10th to the 30th. You set up your crontab with the following 0 … Continue reading →
If you have a few .img files coming as disk images from devices like floppies, CDs, DVDs, SD cards, etc, you will realize that you cannot mount the in Linux, because they contain a file system that has to be … Continue reading →
I have a few boxes that have built in wifi and I dont need it turned on. So I turn it off using the following command nmcli radio wifi off To make sure the wifi radio stays turned off in … Continue reading →