Commands by SeeFor

Commands by SeeFor (2)

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Bash command to convert IP addresses into their "reverse" form
This is sample output - yours may be different.
1

echo "32.6.6.102" | awk -F. '{print $4"."$3"." $2"."$1}'

SeeFor · 2022-04-14 20:07:05 818
Using NMAP to check if a port is open or close

Using NMAP to check to see if port 22(SSH) is open on servers and network devices. Show Sample Output
This is sample output - yours may be different.
```
Host: 192.168.0.254 ()   Ports: 22/open/tcp//ssh///
Host: 192.168.0.252 ()   Ports: 22/closed/tcp//ssh///
```
6

nmap -oG - -T4 -p22 -v 192.168.0.254 | grep ssh

SeeFor · 2011-01-11 16:12:23 5

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Benchmark SQL Query

Benchmark a SQL query against MySQL Server. The example runs the query 10 times, and you get the average runtime in the output. To ensure that the query does not get cached, use `RESET QUERY CACHE;` on top in the query file.

url shortner using google's shortner api

First get a api key for google url shortner from here https://developers.google.com/url-shortener/ Then replace the API_KEY in the command

Display a random man page

I'm not sure why you would want to do this, but this seems a lot simpler (easier to understand) than the version someone submitted using awk.

Extract tarball from internet without local saving

Console clock -- within screen

Configures screen to always display the clock in the last line (has to be configured only once). After that you not only have got the possibility to detach sessions and run them in background, but also have got a nice clock permanently on your screen.

Get the date for the last Saturday of a given month

If your locale has Monday as the first day of the week, like mine in the UK, change the two $7 into $6

See system users

urlencoding with one pure BASH builtin

opposite of https://www.commandlinefu.com/commands/view/10014/urldecoding-with-one-pure-bash-builtin ;-)

Anti DDOS

Takes IP from web logs and pipes to iptables, use grep to white list IPs.. use if a particular file is getting requested by many different addresses. Sure, its already down pipe and you bandwidth may suffer but that isnt the concern. This one liner saved me from all the traffic hitting the server a second time, reconfigure your system so your system will work like blog-post-1.php or the similar so legitimate users can continue working while the botnet kills itself.

Batch edition of all OpenOffice.org Writer files in the current directory (body text)

This function does a batch edition of all OOO3 Writer files in current directory. It uses sed to search a FOO pattern into body text of each file, then replace it to foo pattern (only the first match) . I did it because I've some hundreds of OOO3 Writer files where I did need to edit one word in each ones and open up each file in OOO3 gui wasn't an option. Usage: bsro3 FOO foo

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