Commands by d4n3sh (3)

  • List all files opened by a particular command

    List all file opened by a particular command based on it's command name. Show Sample Output


    25
    lsof -c dhcpd
    d4n3sh · 2009-04-17 07:18:38 11
  • List files opened by a PID

    Lis all files opened by a particular process id. "PID" Show Sample Output


    6
    lsof -p 15857
    d4n3sh · 2009-04-17 07:16:03 5
  • Get the IP address of a machine. Just the IP, no junk.


    3
    /sbin/ifconfig -a | awk '/(cast)/ { print $2 }' | cut -d':' -f2 | head -1
    d4n3sh · 2009-04-15 06:44:18 12

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bulk rename files with sed, one-liner
Far from my favorite, but works in sh and with an old sed that doesn't support '-E'

Rename files in batch

list files recursively by size

Enter a command but keep it out of the history
Put a space in front of your command on the command line and it will not be logged as part of your command line history.

use screen as a terminal emulator to connect to serial consoles
Use GNU/screen as a terminal emulator for anything serial console related. screen /dev/tty eg. screen /dev/ttyS0 9600 MacOSX: http://www.macosxhints.com/article.php?story=20061109133825654 Cheat Sheet: http://www.catonmat.net/blog/screen-terminal-emulator-cheat-sheet/

Get the full path to a file
Useful in scripts when the file is passed in as an argument. Eg. $ filepath=$(realpath $1)

Get AWS temporary credentials ready to export based on a MFA virtual appliance
You might want to secure your AWS operations requiring to use a MFA token. But then to use API or tools, you need to pass credentials generated with a MFA token. This commands asks you for the MFA code and retrieves these credentials using AWS Cli. To print the exports, you can use: `awk '{ print "export AWS_ACCESS_KEY_ID=\"" $1 "\"\n" "export AWS_SECRET_ACCESS_KEY=\"" $2 "\"\n" "export AWS_SESSION_TOKEN=\"" $3 "\"" }'` You must adapt the command line to include: * $MFA_IDis ARN of the virtual MFA or serial number of the physical one * TTL for the credentials

Compare two CSV files, discarding any repeated lines
The value for the sort command's -k argument is the column in the CSV file to sort on. In this example, it sorts on the second column. You must use some form of the sort command in order for uniq to work properly.

Create a directory and go inside it
$_ expands to the last argument of the last command that was executed

Incase you miss the famous 'C:\>' prompt

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