Commands by bandit36 (3)

  • Periodically loop a command

    You can use this to loop any command to periodically see the output. while true; do [YOUR COMMAND HERE]; sleep [# of seconds]; done; Alternatively, you can put it in a simple shell script to save typing! #/!bin/bash while true; do $1; sleep $2; done; /path/to/script.sh "ifconfig eth0 | grep 'inet addr:'" 60 Show Sample Output


    -5
    while true; do ifconfig eth0 | grep "inet addr:"; sleep 60; done;
    bandit36 · 2009-04-01 19:29:28 19
  • Scan your LAN for unauthorized IPs

    populate the auth.hosts file with a list of IP addresses that are authorized to be in use and when you run this command it will return the addresses that are pingable and not in the authorized list. Can be combined with the "Command line Twitter" command to tweet unauthorized access. Show Sample Output


    1
    diff <(nmap -sP 192.168.1.0/24 | grep ^Host | sed 's/.appears to be up.//g' | sed 's/Host //g') auth.hosts | sed 's/[0-9][a-z,A-Z][0-9]$//' | sed 's/</UNAUTHORIZED IP -/g'
    bandit36 · 2009-03-12 05:28:08 8
  • Backup your hard drive with dd

    This will create an exact duplicate image of your hard drive that you can then restore by simply reversing the "if" & "of" locations. sudo dd if=/media/disk/backup/sda.backup of=/dev/sda Alternatively, you can use an SSH connection to do your backups: dd if=/dev/sda | ssh user@ssh.server.com dd of=~/backup/sda.backup


    16
    sudo dd if=/dev/sda of=/media/disk/backup/sda.backup
    bandit36 · 2009-02-27 20:23:37 19

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Selecting a random file/folder of a folder
Also looks in subfolders

Send an email from the terminal when job finishes
Might as well include the status code it exited with so you know right away if it failed or not.

Find removed files still in use via /proc
Oracle DBA remove some logfiles which are still open by the database and he is complaining the space has not been reclaimed? Use the above command to find out what PID needs to be stopped. Or alternatively recover the file via: $ cp /proc/pid/fd/filehandle /new/file.txt

ping with timestamp

Look for IPv4 address in files.
It finds a SNMP OID too :-(

Install pip with Proxy
Installs pip packages defining a proxy

Find removed files still in use via /proc
Oracle DBA remove some logfiles which are still open by the database and he is complaining the space has not been reclaimed? Use the above command to find out what PID needs to be stopped. Or alternatively recover the file via: $ cp /proc/pid/fd/filehandle /new/file.txt

Find usb device
I often use it to find recently added ou removed device, or using find in /dev, or anything similar. Just run the command, plug the device, and wait to see him and only him

Changing the terminal title to the last shell command
Found the same command for zsh in http://www.davidpashley.com/articles/xterm-titles-with-bash.html - changed it a bit so that the behaviour is the same

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

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