Commands by keltroth

Commands by keltroth (6)

sorted by

Rename all files in lower case

rename is a really powerfull to, as its name suggests, rename files Show Sample Output
This is sample output - yours may be different.
```
aETEBezhrhe.txt REHTY.txt rthureioght.txt
becomes :
aetebezhrhe.txt rehty.txt rthureioght.txt
```
4

rename 'y/A-Z/a-z/' *

keltroth · 2018-11-21 13:41:24 472
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 14:09:26 368
Get a docker container's run command line

A good way to build a new container when you don't remember how you did it the first time Show Sample Output
This is sample output - yours may be different.
```
docker run --name=mariadb --hostname=43bdf5467ad --env="MYSQL_ROOT_PASSWORD=xxxxxxxx" --env="PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin" --env="GOSU_VERSION=1.10" --env="MARIADB_MAJOR=10.1" --env="MARIADB_VERSION=1:10.1.36+maria-1~bionic" --volume="/var/lib/mysql" -p 3308:3306 --restart=always --detach=true mariadb:10.1 mysqld
```
1

docker run --rm -v /var/run/docker.sock:/var/run/docker.sock assaflavie/runlike [ID_CONTAINER]

keltroth · 2018-11-07 13:39:55 635
Python version to a file

More direct like this Show Sample Output
This is sample output - yours may be different.
```
cat file
Python 2.7.12
```
-1

python -V 2> file

keltroth · 2018-11-07 13:21:56 678
Generate a list of items from a couple of items lists A and B, getting (B - A ) set
This is sample output - yours may be different.
0

comm -13 ItemsListtoAvoid.txt AllItemsList.txt > ItemsDifference.txt

keltroth · 2018-10-29 14:43:16 618
Adding Prefix to File name
This is sample output - yours may be different.
3

rename 's/^/PREFIX/g' *

keltroth · 2016-04-19 15:50:07 12

What's this?

commandlinefu.com is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

Share Your Commands

Check These Out

Bitcoin prices from the command line

Create sqlite db and store image

Creates a simple sqlite db (img.db) inserts /tmp/Q.jpg on base64 an recorvers it as /tmp/W.jpg

Simple server which listens on a port and prints out received data

Sometimes you need a simple server which listens on a port and prints out received data. Example: Consider you want to know, which data is posted by a homepage to a remote script without analysing the html code! A simple way to do this is to save the page to your computer, substitude all action="address" with action="localhost:portnumber", run 'ncat -l portnumber' and open the edited page with your browser. If you then submit the form, ncat will print out the http-protocol with all the posted data.

Benchmark SQL Query

Benchmark a SQL query against MySQL Server. The example runs the query 10 times, and you get the average runtime in the output. To ensure that the query does not get cached, use `RESET QUERY CACHE;` on top in the query file.

clear MyDNS-ng cache

Occasionally, to force zone updating, cache flush is necessary. This command is better than restart the mydns daemon.

Find files that are older than x days

Find files that are older than x days in the working directory and list them. This will recurse all the sub-directories inside the working directory. By changing the value for -mtime, you can adjust the time and by replacing the ls command with, say, rm, you can remove those files if you wish to.

put an unpacked .deb package back together

If any changes have been made to the package while it was unpacked (ie, conffiles files in /etc modi‐fied), the new package will inherit the changes. This way you can make it easy to copy packages from one computer to another, or to recreate packages that are installed on your system, but no longer available elsewhere. Note: dpkg-repack will place the created package in the current directory.

Cut flv video from minute 19 to minute 20 using flvtool2

We should calculate the video duration to milliseconds, 1 minute = 60000 milliseconds

Restart openssh-server on your Synology NAS from commandline.

The correct way to restart openssh-server on your synology nas.

Advanced python tracing

Trace python statement execution and syscalls invoked during that simultaneously

Stay in the loop…

Follow the Tweets.

Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.

» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10

Subscribe to the feeds.

Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):

Subscribe to the feed for:

» all commands
» commands with 3 up-votes (commandlinefu3)
» commands with 10 up-votes (commandlinefu10)
» commands by keltroth