Commands by ironmarc

Commands by ironmarc (6)

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Flush memory cache
This is sample output - yours may be different.
-3

free && sync && echo 3 > /proc/sys/vm/drop_caches && free

ironmarc · 2016-11-02 08:51:01 0
clear MyDNS-ng cache

Occasionally, to force zone updating, cache flush is necessary. This command is better than restart the mydns daemon.
This is sample output - yours may be different.
1

kill -SIGHUP `cat /var/run/mydns.pid`

ironmarc · 2011-10-21 14:29:24 0
Empty Bind9 cache

Occasionally, to force zone updating, cache flush is necessary. The use of this command is better than restart the Bind9 process.
This is sample output - yours may be different.
2

rndc flush

ironmarc · 2011-10-21 14:27:05 0
SVN script for automatically adding and deleting files
This is sample output - yours may be different.
1

svn status | grep '^?' | sed -e 's/^? */svn add "/g' -e 's/$/"/g'|sh ; svn status | grep '^!' | sed -e 's/^! */svn delete "/g' -e 's/$/"/g'|sh

ironmarc · 2010-11-18 09:57:45 0
Sniff ONLY POP3 authentication by intercepting the USER command

The command is useful for monitoring the use of the boxes and their connection IP. Result file "sniff" is readable with GUI program "wireshark" or through CLI with the command: tcpdump -f "sniff" -XX Show Sample Output
This is sample output - yours may be different.
```
USER username@maildomain.com
```
0

tcpdump -i eth0 "tcp port pop3 and ip[40] = 85 and ip[41] = 83" -s 1500 -n -w "sniff"

ironmarc · 2010-11-18 09:03:08 0
Remove unused libs/packages in debian-based distros
This is sample output - yours may be different.
-3

apt-get remove `deborphan`

ironmarc · 2010-11-15 15:15:39 0

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Find usb device in realtime

Using this command you can track a moment when usb device was attached.

SMTP Analysis

This works just as well for SMTP. You could run this on your mail server to watch e-mail senders and recipients: tcpdump -l -s0 -w - tcp dst port 25 | strings | grep -i 'MAIL FROM\|RCPT TO'

stream a youtube video with mpv where $1 is the youtube link.

opens a new session with video stream

List by size all of the directories in a given tree.

Which processes are listening on a specific port (e.g. port 80)

swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

Edit all files found having a specific string found by grep

The grep switches eliminate the need for awk and sed. Modifying vim with -p will show all files in separate tabs, -o in separate vim windows. Just wish it didn't hose my terminal once I exit vim!!

check open ports (both ipv4 and ipv6)

While `lsof` will work, why not use the tool designed explicitly for this job? (If not run as root, you will only see the names of PID you own)

Top 10 Memory Processes

It displays the top 10 processes sorted by memory usage

Convert unix timestamp to date

Detect illegal access to kernel space, potentially useful for Meltdown detection

Based on capsule8 agent examples, not rigorously tested

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