Commands by brx75x

Commands by brx75x (5)

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Grep live log tailing
This is sample output - yours may be different.
0

tail -F some_log_file.log | grep --line-buffered the_thing_i_want

brx75x · 2018-01-24 09:54:36 0
ShellCheck all the bash/sh script under a specific directory excluding version control

This is a commodity one-liner that uses ShellCheck to assure some quality on bash and sh scripts under a specific directory. It ignores the files in .git directory. Just substitute "./.git/*" with "./.svn/*" for older and booring centralized version control. Just substitute ShellCheck with "rm" if your scripts are crap and you want to get rid of them :)
This is sample output - yours may be different.
5

find . -type f ! -path "./.git/*" -exec sh -c "head -n 1 {} | egrep -a 'bin/bash|bin/sh' >/dev/null" \; -print -exec shellcheck {} \;

brx75x · 2017-03-16 08:43:56 3
Prefix every line with a timestamp
This is sample output - yours may be different.
1

any command | sed "s/^/\[`date +"%Y%m%d%H%M%S"`]/"

brx75x · 2014-02-10 16:18:51 2
encode HTML entities

Encode HTML entities supporting UTF-8 input and output
This is sample output - yours may be different.
0

perl -MHTML::Entities -ne 'print encode_entities($_)' /tmp/subor.txt

brx75x · 2012-10-11 08:31:14 0
Create a continuous digital clock in Linux terminal

Same effect, only shell commands. Show Sample Output
This is sample output - yours may be different.
```
15:25:31
```
1

while [ 1 ] ; do echo -en "$(date +%T)\r" ; sleep 1; done

brx75x · 2012-10-01 13:25:49 0

Considering A New Car?

You should consider a Tesla. Get 6 Months Free Supercharging.

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Analyze awk fields

Breaks down and numbers each line and it's fields. This is really useful when you are going to parse something with awk but aren't sure exactly where to start.

Run bash on top of a vi session (saved or not saved), run multiple commands, instead of one at a time with :!(bashcommand), type exit and [enter] to get back to where you left off in vi.

Helps when I'm editing a script and want to double check some commands without having to exit out of vi multiple times or having to use another terminal session.

Create a new file

Create a bash script from last commands

In order to write bash-scripts, I often do the task manually to see how it works. I type ### at the start of my session. The function fetches the commands from the last occurrence of '###', excluding the function call. You could prefix this with a here-document to have a proper script-header. Delete some lines, add a few variables and a loop, and you're ready to go. This function could probably be much shorter...

Compare two directories

Output of this command is the difference of recursive file lists in two directories (very quick!). To view differences in content of files too, use the command submitted by mariusbutuc (very slow!): $ diff -rq path_to_dir1 path_to_dir2

Geolocate a given IP address

GeoIP Needs to be installed. Can be done from some distro's or via MaxMind.com for free. There even is a free city database availabble. If the GeoLiteCity is downloaded and installed it will also find more information $ geoiplookup -f /var/lib/GeoIP/GeoLiteCity.dat commandlinefu.com GeoIP City Edition, Rev 1: US, NJ, Absecon, 08201, 39.420898, -74.497704, 504, 609

Get the 10 biggest files/folders for the current direcotry

This command simply outputs 10 files in human readable, that takes most space on your disk in current directory.

Number of connections to domains on a cPanel server

Oneliner to run commands on multiple servers

Oneliner to run commands on multiple servers over ssh. - First parameter "$1" is the command you want to execute remotely. ( It can be multiple commands e.g. "hostname;uptime") - Second parameter "${@:2}" represents the remote host/s you want to run the command/s on.

Remove space and/or tab characters at the end of line

The command removes all space and/or tabulation characters preceding new line

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