Commands tagged xxd sorted by votes

Commands tagged xxd (6)

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Generate a Random MAC address

Use the following variation for FreeBSD: openssl rand 6 | xxd -p | sed 's/$..$/\1:/g; s/:$//'
This is sample output - yours may be different.
16

openssl rand -hex 6 | sed 's/$..$/\1:/g; s/.$//'

putnamhill · 2010-09-23 02:31:12 6
Binary injection

Replace (as opposed to insert) hex opcodes, data, breakpoints, etc. without opening a hex editor. HEXBYTES contains the hex you want to inject in ascii form (e.g. 31c0) OFFSET is the hex offset (e.g. 49cf) into the binary FILE
This is sample output - yours may be different.
2

echo -n $HEXBYTES | xxd -r -p | dd of=$FILE seek=$((0x$OFFSET)) bs=1 conv=notrunc

zombiedeity · 2009-03-11 17:02:24 368
Binary search/replace

Replace all instances of "A" with "B" in file "source" saved as file "destination". !! IF A/B is multi-byte, then separate bytes with spaces like so: "s/20\ 0A/00/g". Show Sample Output
This is sample output - yours may be different.
```
 
```
2

xxd -p source | fold -w2 | paste -sd' ' | sed "s/A/B/g" | xxd -p -r > destination

hincor · 2015-05-26 18:29:48 53
use xxd to create the wake on lan magicpacket and write to pcap file

just set macdst to the mac address of the system you wish to wake up, the macsrc is optional but helps use tcpreplay to broadcast or wireshark to view
This is sample output - yours may be different.
1

macdst="5873b856445f";macsrc="d2a791e1715a";pkt="d4c3b2a1020004000000000000000000ffff000001000000e3eab353fa1f 0b007400000074000000$macdst $macsrc 0842ffffffffffff";for i in {1..16}; do pkt="$pkt $macdst"; done; echo "$pkt" | xxd -r -p > magicpacket.pcap

unixmonkey77095 · 2014-07-02 17:37:44 7
print all characters of a file using hexdump

xxd can convert a hexdump back to binary using the -r option which can be useful for patching or editing binary files.
This is sample output - yours may be different.
0

xxd <file>

putnamhill · 2011-09-09 21:52:30 4
Function to check whether a regular file ends with a newline

end_w_nl filename will check if the last byte of filename is a unix newline character. tail -c1 yields the file's last byte and xxd converts it to hex format.
This is sample output - yours may be different.
0

end_w_nl() { [[ $(tail -c1 $1 | xxd -ps) == 0a ]] }

xro · 2012-09-18 20:11:29 6

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Socksify any program to avoid restrictive firwalls

Require: - tsocks (deb pkg) - A working SOCKS proxy. It's easy with ssh: $ ssh -N -D localhost:1080 your.home.pc -p 443 - tsocks configuration in your /etc/tsocks.conf (for the previous): server = 127.0.0.1 server_port = 1080

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

A function to find the newest file in a directory

Number file

Save your open windows to a file so they can be opened after you restart

This will save your open windows to a file (~/.windows). To start those applications: $ cat ~/.windows | while read line; do $line &; done Should work on any EWMH/NetWM compatible X Window Manager. If you use DWM or another Window Manager not using EWMH or NetWM try this: $ xwininfo -root -children | grep '^ ' | grep -v children | grep -v '' | sed -n 's/^ *$0x[0-9a-f]*$ .*/\1/p' | uniq | while read line; do xprop -id $line _NET_WM_PID | sed -n 's/.* = $[0-9]*$$/\1/p'; done | uniq -u | grep -v '^$' | while read line; do ps -o cmd= $line; done > ~/.windows

Show sorted list of files with sizes more than 1MB in the current dir

remove *.jpg smaller than 500x500

Play random music from blip.fm

Get shellcode of the binary using objdump

Anyone can make the command smaller & easier? :)

list files recursively by size

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Commands tagged xxd (6)

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