Archives

All posts by phatdee

Google Sheets: Sorting by Xn characters.

Posted by phatdee on December 24, 2019

Posted in: Google Apps. Tagged: formula, google sheets, len, right. Leave a Comment

Sometimes sorting gets really frustrating when all the data you are trying to sort isn’t formatted the same.

Create a new column next to the column you’re attempting to sort, then use this formula to move X amount of characters.Â I’m using Ford Part #’s and I need to sort by the 4th character in which is the Z

A2 cell = C0AZ-7153-A

=RIGHT(A2,LEN(A2)-x)

1	=RIGHT(A2,LEN(A2)-x)

Whereas x = the amount you want to move for example

=RIGHT(A2,LEN(A2)-3)

1	=RIGHT(A2,LEN(A2)-3)

which gives

Z-7153-A

From there just copy that formula to the rest of the cells in the new column then u can sort sheet under that column.

Cheat Sheet for mdadm & lvm

Posted by phatdee on December 24, 2019

Posted in: LVM, mdadm. Tagged: gpt, initramfs, lv, lvm, md0, mdadm, mirror, mkpart, parted, pv, pvcreate, raid1, sfdisk, sysctl, vg. Leave a Comment

Copied from https://gist.github.com/plepe

mdadm

md: multiple devices
command description

cat /proc/mdstat

1	cat /proc/mdstat

show status of all raids

mdadm --detail /dev/md0

1	mdadm --detail /dev/md0

detailed status of raid md0

mdadm --create /dev/md0 -n2 -l1 /dev/sda1 /dev/sdb1

1	mdadm --create /dev/md0 -n2 -l1 /dev/sda1 /dev/sdb1

new raid /dev/md0 with 2 disks, raid level 1 on /dev/sda1 and /dev/sda2

mdadm --fail /dev/md0 /dev/sda1

1	mdadm --fail /dev/md0 /dev/sda1

mdadm --remove /dev/md0 /dev/sda1

1	mdadm --remove /dev/md0 /dev/sda1

remove /dev/sda1 from /dev/md0

mdadm --add /dev/md0 /dev/sda1

1	mdadm --add /dev/md0 /dev/sda1

add /dev/sda1 to /dev/md0

mdadm --grow /dev/md0 -n3

1	mdadm --grow /dev/md0 -n3

use 3 disks in raid /dev/md0 (e.g. add an additional disk, so a damaged drive can be removed later-on)

mdadm --assemble /dev/md0

1	mdadm --assemble /dev/md0

Assemble /dev/md0 (e.g. when running live system)

mdadm --detail --scan >> /etc/mdadm/mdadm.conf

1	mdadm --detail --scan >> /etc/mdadm/mdadm.conf

Update list of arrays in /etc/mdadm/mdadm.conf ; you should remove old list by hand first!

mdadm --examine /dev/sda1

1	mdadm --examine /dev/sda1

What is this disk / partition?

sysctl -w dev.raid.speed_limit_min=10000

1	sysctl -w dev.raid.speed_limit_min=10000

Set minimum raid rebuilding speed to 10000 kiB/s (default 1000)

sfdisk -d /dev/sdX | sfdisk /dev/sdY

1	sfdisk -d /dev/sdX \| sfdisk /dev/sdY

Copy partition table from sdX to sdY (MBR only)

sgdisk /dev/sdX -R /dev/sdY ; sgdisk -G /dev/sdY

1	sgdisk /dev/sdX -R /dev/sdY ; sgdisk -G /dev/sdY

Copy partition table from sdX to sdY (GPT)

To boot a machine even with a degraded array, modify /etc/initramfs-tools/conf.d/mdadm and run update-initramfs -c -kall (Use with caution!)

LVM

pv: physical device (e.g. /dev/md0 or /dev/sda1)
vg: volume group (consists of 1 or more pvs, contains lvs); has a name (e.g. lvm)
lv: logical volume (has a name which defines its path, e.g. /dev/lvm/root which equals dev/mapper/lvm-root)
command description

pvcreate /dev/md0

1	pvcreate /dev/md0

initializes /dev/md0 as phys device for a volume group

vgcreate lvm /dev/md0

1	vgcreate lvm /dev/md0

create volume group lvm with phys device /dev/md0

lvcreate -L30G -nroot lvm ; mkfs.ext4 /dev/lvm/root

1	lvcreate -L30G -nroot lvm ; mkfs.ext4 /dev/lvm/root

create logical volume root, sized 30G in volume group lvm; format with ext4

lvextend -L60G -nroot lvm ; resize2fs /dev/lvm/root

1	lvextend -L60G -nroot lvm ; resize2fs /dev/lvm/root

extend /dev/lvm/root to 60G; also resize file system to new size

pvs, vgs, lvs

1	pvs, vgs, lvs

show short info about pv, vg and lv

pvdisplay, vgdisplay, lvdisplay

1	pvdisplay, vgdisplay, lvdisplay

show long info

pvscan /dev/md0

1	pvscan /dev/md0

scan disks for physical volumes (e.g. when running live system)

vgextend lvm /dev/md1

1	vgextend lvm /dev/md1

add phys device /dev/md1 to volume group lvm (need pvcreate first!)

pvmove /dev/md0 ; vgreduce lvm /dev/md0

1	pvmove /dev/md0 ; vgreduce lvm /dev/md0

move all logical volumes from /dev/md0 and remove phys device from volume group

Other
create bios grub partition

parted
mklabel gpt
unit s
mkpart bios 64s 2047s
set 1 bios_grub on
mkpart NAME 2048s [end]

parted

mklabel gpt

unit s

mkpart bios 64s 2047s

set 1 bios_grub on

mkpart NAME 2048s [end]

Nmap Command Examples

Posted by phatdee on June 4, 2019

Posted in: Nmap. Tagged: nmap. Leave a Comment

This is really old, but still helpful

Basic scan:

$ sudo nmap 192.168.1.50

1

$ sudo nmap 192.168.1.50
Scan multiple addresses:

$ sudo nmap 192.168.1.50 192.168.1.51 192.168.1.52

1

$ sudo nmap 192.168.1.50 192.168.1.51 192.168.1.52
Scan entire subnet looking for valid hosts. This quick scan will also grab MAC address and perform MAC lookup to help determine what the host is.

$ sudo nmap -sP 192.168.1.50

1

$ sudo nmap -sP 192.168.1.50
Â Discovery:Â Before a scan nmap will attempt to send an ICMP echo request.Â To not send the ICMP, :

$ sudo nmap -PN 192.168.1.50

1

$ sudo nmap -PN 192.168.1.50
To do only a ping scan:

$ sudo nmap -sP 192.168.1.50

1

$ sudo nmap -sP 192.168.1.50
Do an ARP Ping scan:

$ sudo nmap -PR 192.168.1.50

1

$ sudo nmap -PR 192.168.1.50
Port Scanning options:Â Performing a Fast scan:

$ sudo nmap -F 192.168.1.50

1

$ sudo nmap -F 192.168.1.50
Scan only specific ports:

$ sudo nmap -p22 192.168.1.50

1

$ sudo nmap -p22 192.168.1.50
Scan multiple ports:

$ sudo nmap -p 22,25,53 , 80-250 192.168.1.50

1

$ sudo nmap -p 22,25,53 , 80-250 192.168.1.50
Scan ports by name (found in /etc/services)

$ sudo nmap -p snmtp,ftpÂ 192.168.1.50

1

$ sudo nmap -p snmtp,ftpÂ 192.168.1.50
Scan all ports:

$ sudo nmap -p "*" 192.168.1.50

1

$ sudo nmap -p "*" 192.168.1.50
Choose between TCP and/or UDP:

$ sudo nmap -p -T:3000-4000 192.168.1.50

1

$ sudo nmap -p -T:3000-4000 192.168.1.50
What OS is the target running?

$ sudo nmap -O 192.168.1.50

1

$ sudo nmap -O 192.168.1.50
If the OS is unknown, have nmap attempt to guess the OS

$ sudo nmap -O --osscan-guessÂ 192.168.1.50

1

$ sudo nmap -O --osscan-guessÂ 192.168.1.50
Service version detection

$ sudo nmap -sV 192.168.1.50

1

$ sudo nmap -sV 192.168.1.50

Disable Energy Star features on monitors

Posted by phatdee on May 31, 2019

Posted in: Uncategorized. Leave a Comment

I have no idea how or why this started happening however my monitors would go black after 15 seconds of idle.Â No power settings or screensavers were causing it, nor did I see any helpful logs to help troubleshoot.Â However somewhere/how the Energy Star features of my monitor got enabled and literally after 15 seconds of idle time the monitors would go black..

Simple fix:

$ sudo xset -dpms

1	$ sudo xset -dpms

This fixed the issue not only for the current logged in session but also after a reboot.

Passing arguments in bash scripts.

Posted by phatdee on May 14, 2019

Posted in: Bash. Tagged: args, bash, env. Leave a Comment

$# : Number of arguments passed via script

$0 : Name of the script

$@ : Names of arguments passed to the script at execution

$$ : Process ID associated with script

$OSTYPE : What’s the OS type?

$TERM :Â What’s term is being used?

$USER : What’s the username that executed the script?

$HOSTNAME : What’s the hostname of the box that ran the script?

$LOGNAME :Â What was the login username?

$LINENO : Current line # of the script

$RANDOM : Random #

$BASH_SOURCE :Â What’s the bash source?

Example script:

#! /bin/bash

echo "Number of arguments passed via script: " $#
echo "Name of the Script: " $0
echo "Names of arguments passed via the script: " $@
echo "Whats the process ID associated with this script: " $$
echo "What was the username that started this script: " $USER
echo "What was the hostname of the box that ran this script: " $HOSTNAME
echo "The number of seconds since the script was started: " $SECONDS
echo "Random number, please: " $RANDOM
echo "Whats the current line # on this script: " $LINENO
echo "What is my bash source? " $BASH_SOURCE
echo "Whats the login name? " $LOGNAME
echo "Whats my term? " $TERM
echo "Whats the OS type? " $OSTYPE

#! /bin/bash

echo "Number of arguments passed via script: " $#

echo "Name of the Script: " $0

echo "Names of arguments passed via the script: " $@

echo "Whats the process ID associated with this script: " $$

echo "What was the username that started this script: " $USER

echo "What was the hostname of the box that ran this script: " $HOSTNAME

echo "The number of seconds since the script was started: " $SECONDS

echo "Random number, please: " $RANDOM

echo "Whats the current line # on this script: " $LINENO

echo "What is my bash source? " $BASH_SOURCE

echo "Whats the login name? " $LOGNAME

echo "Whats my term? " $TERM

echo "Whats the OS type? " $OSTYPE

$ bash test.bash.args.sh this is a goofy ass test

Number of arguments passed via script:  6
Name of the Script:  test.bash.args.sh
Names of arguments passed via the script:  this is a goofy ass test
Whats the process ID associated with this script:  15420
What was the username that started this script:  testuser
What was the hostname of the box that ran this script:  evergreen.corp
The number of seconds since the script was started:  0
Random number, please:  27597
Whats the current line # on this script:  11
What is my bash source?  test.bash.args.sh
Whats the login name?  testuser
Whats my term?  xterm-256color
Whats the OS type?  linux-gnu

$ bash test.bash.args.sh this is a goofy ass test

Number of arguments passed via script: 6

Name of the Script: test.bash.args.sh

Names of arguments passed via the script: this is a goofy ass test

Whats the process ID associated with this script: 15420

What was the username that started this script: testuser

What was the hostname of the box that ran this script: evergreen.corp

The number of seconds since the script was started: 0

Random number, please: 27597

Whats the current line # on this script: 11

What is my bash source? test.bash.args.sh

Whats the login name? testuser

Whats my term? xterm-256color

Whats the OS type? linux-gnu

UnixDude

"To be a warrior is not a simple matter of wishing to be one. It is rather an endless struggle that will go on to the very last moment of our lives. Nobody is born a warrior, in exactly the same way that nobody is born an average man. We make ourselves into one or the other." --Kokoro

Archives

All posts by phatdee

Google Sheets: Sorting by Xn characters.

Cheat Sheet for mdadm & lvm

Copied from https://gist.github.com/plepe

mdadm

LVM

Other
create bios grub partition

Nmap Command Examples

Disable Energy Star features on monitors

Passing arguments in bash scripts.

Categories

Archives

Spam Blocked

Recent Posts

LinuxSecurity – Security Articles

Unknown Feed

Categories

Spam Blocked

Recent Posts

LinuxSecurity – Security Articles

Unknown Feed

My Steam’s Game WishList

Copied from https://gist.github.com/plepe

mdadm

LVM

Other create bios grub partition

Categories

Archives

Spam Blocked

Recent Posts

Categories

Spam Blocked

Recent Posts

My Steam’s Game WishList

Other
create bios grub partition