Commands by BoxingOctopus

Commands by BoxingOctopus (11)

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Pretty-print user/group info for a given user
This is sample output - yours may be different.
1

id <username> | sed s/' '/'\n'/g | sed s/,/',\n '/g | sed s/'('/' ('/g | sed s/uid/' uid'/g | sed s/gid/' gid'/g | sed s/=/' = '/g

BoxingOctopus · 2016-10-04 16:53:29 19
dd with pretty progress bar (Requires pv and dialog)
This is sample output - yours may be different.
0

(pv -n centos-7.0-1406-x86_64-DVD.img | dd of=/dev/disk4 bs=1m conv=notrunc,noerror) 2>&1 | dialog --gauge "Copying CentOS to USB Stick in /dev/disk4" 10 70 0

BoxingOctopus · 2015-01-19 19:36:15 12
Create a bunch of dummy text files
This is sample output - yours may be different.
1

for i in `seq 1 4096`; do tr -dc A-Za-z0-9 </dev/urandom | head -c8192 > dummy$i.rnd; done

BoxingOctopus · 2013-11-11 21:27:15 9
Find a machine's IP address and FQDN
This is sample output - yours may be different.
0

for i in `ip addr show dev eth1 | grep inet | awk '{print $2}' | cut -d/ -f1`; do echo -n $i; echo -en '\t'; host $i | awk '{print $5}'; done

BoxingOctopus · 2013-09-05 17:50:33 8
Duplicate installed packages from one machine to the other (RPM-based systems)
This is sample output - yours may be different.
36

ssh root@remote.host "rpm -qa" | xargs yum -y install

BoxingOctopus · 2012-01-06 17:10:56 16
"Clone" a list of installed packages from one Debian/Ubuntu Server to another
This is sample output - yours may be different.
13

apt-get install `ssh root@host_you_want_to_clone "dpkg -l | grep ii" | awk '{print $2}'`

BoxingOctopus · 2011-05-10 13:33:51 8
Grab a list of MP3s out of Firefox's cache

Ever gone to a site that has an MP3 embedded into a pesky flash player, but no download link? Well, this one-liner will yank the names of those tunes straight out of FF's cache in a nice, easy to read list. What you do with them after that is *ahem* no concern of mine. ;) Show Sample Output
This is sample output - yours may be different.
```
4CF25EB3d01
```
4

for i in `ls ~/.mozilla/firefox/*/Cache`; do file $i | grep -i mpeg | awk '{print $1}' | sed s/.$//; done

BoxingOctopus · 2010-04-11 23:14:18 8
download and unpack tarball without leaving it sitting on your hard drive
This is sample output - yours may be different.
17

wget -qO - http://example.com/path/to/blah.tar.gz | tar xzf -

BoxingOctopus · 2010-02-15 04:00:29 21
Grab an interface's IP from ifconfig without screen clutter

Sometimes, you don't really care about all the other information that ifconfig spits at you (however useful it may otherwise be). You just want an IP. This strips out all the crap and gives you exactly what you want. Show Sample Output
This is sample output - yours may be different.
```
eth1: 192.168.100.73
```
2

ifconfig eth1 | grep inet\ addr | awk '{print $2}' | cut -d: -f2 | sed s/^/eth1:\ /g

BoxingOctopus · 2009-11-03 19:26:40 10
Comment out a line in a file

This will comment out a line, specified by line number, in a given file.
This is sample output - yours may be different.
5

sed -i '19375 s/^/#/' file

BoxingOctopus · 2009-10-07 17:50:40 7
Netstat Connection Check

This command does a tally of concurrent active connections from single IPs and prints out those IPs that have the most active concurrent connections. VERY useful in determining the source of a DoS or DDoS attack. Show Sample Output
This is sample output - yours may be different.
```
[root@vps10 root]# netstat -ntu | awk '{print $5}' |  cut -d: -f1 | sort | uniq -c | sort -n | tail           
      8	200.217.193.102
      8	82.101.189.139
      9	84.195.188.60
     11	189.63.98.3
     11	60.28.166.169
     13	24.227.166.150
     15	200.214.44.134
     16	189.92.141.77
     22	189.14.101.44
     31	127.0.0.1
```
2

netstat -ntu | awk '{print $5}' | cut -d: -f1 | sort | uniq -c | sort -n | tail

BoxingOctopus · 2009-02-16 15:48:27 771

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See entire packet payload using tcpdump.

Look for English words in /dev/urandom

* to get the English dictionary: wget http://www.mavi1.org/web_security/wordlists/webster-dictionary.txt

Recursive cat - concatenate files (filtered by extension) across multiple subdirectories into one file

Useful if you have to put together multiple files into one and they are scattered across subdirectories. For example: You need to combine all .sql files into one .sql file that would be sent to DBAs as a batch script. You do get a warning if you create a file by the same extension as the ones your searching for. find . -type f -name *.sql -exec cat {} > BatchFile.txt \;

Create a DOS floppy image

mount with: mount -t msdos -o loop ./floppy.img /tmp/mnt

Find files containing string and open in vim

I often use "vim -p" to open in tabs rather than buffers.

cp the file

Copy the file with the given .extension at the source file's location. Eliminates the typing of long paths again and again.

Updating the status on identi.ca using curl.

identica is an open source social networking and micro-blogging service. Based on Laconica, a micro-blogging software package built on the OpenMicroBlogging specification. http://identi.ca/

list block devices

Shows all block devices in a tree with descruptions of what they are.

Resize an image to at least a specific resolution

This command will resize an image (keeping the aspect ratio) to a specific resolution, meaning the resulting image will never be smaller than this resolution. For example, if we have a 2048x1000 image, the output would be 1229x600, not 1024x600 or 1024x500. Same thing for the height, if the image is 2000x1200, the output would be 1024x614.

Automatically download Ubuntu 10.04 when available

Tested with 9.10 release. Choose whatever torrent client you prefer.

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