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

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If (and only if) the variable is not set, prompt users and give them a default option already filled in.

The read command reads input and puts it into a variable. With -i you set an initial value. In this case I used a known environment variable.

Print out your hard drive to a jet-direct compatible printer.

Where 192.168.1.2 is a printer with jet-direct. No, I don't suggest this as a backup method.

find files beginning with filename* that do not include "string"

Inverse grep, to find files without the string

Find the package that installed a command

Filter IPs out of files

Identify differences between directories (possibly on different servers)

This can be much faster than downloading one or both trees to a common servers and comparing the files there. After, only those files could be copied down for deeper comparison if needed.

redirect stdout and stderr each to separate files and print both to the screen

list block devices

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

Mirror a directory structure from websites with an Apache-generated file indexes

wget/curl/friends are not good with mirroring files off websites, especially those with Apache-generated directory listings. These tools endlessly waste time downloading useless index HTML pages. lftp's mirror command does a better job without the mess.

Get your external IP address

curl ifconfig.me/ip -> IP Adress curl ifconfig.me/host -> Remote Host curl ifconfig.me/ua ->User Agent curl ifconfig.me/port -> Port thonks to http://ifconfig.me/

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