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VI/VIM Anonymize email address in log file

The number 5 means to replace the leading and trailing 5 characters of an "@" in a log file with XXXX@XXXXX.
This is sample output - yours may be different.
0

%s/.\{5\}@.\{5\}/XXXXX@XXXXXX/g

dasmna · 2019-12-12 15:37:17 0
Print all git repos from a user (only curl and grep)
This is sample output - yours may be different.
0

curl -s https://api.github.com/users/<username>/repos?per_page=1000 | grep -oP '(?<="git_url": ").*(?="\,)'

acavagni · 2019-12-11 20:55:13 0
Show all current listening programs by port and pid with SS instead of netstat
This is sample output - yours may be different.
1

ss -plunt

symgryph · 2019-12-09 17:44:55 1
Identify all amazon cloudformation scripts recursively using ripgrep

This assumes you are in the cwd of where you put your s3 scripts. Its useful if someone decides to create aws cloudformation scripts and doesn't add the 'yaml' or .yml extension. Show Sample Output
This is sample output - yours may be different.
```
2019-12-05/1264/123123123/StackSet-MyCoolScriptlimitCheckStack-P9PAO5WIAKQA
2019-12-05/1264/23123231123/ServiceUsageLimitMonitor-20181121-limitMySadness
```
0

rg -l "AWSTemplateFormatVersion: '2010-09-09'" *

symgryph · 2019-12-09 17:43:10 1
Print all git repos from a user

Python is installed on many boxes (in case you could not afford installing jq).
This is sample output - yours may be different.
-1

curl -s "https://api.github.com/users/<username>/repos?per_page=1000" | python <(echo "import json,sys;v=json.load(sys.stdin);for i in v:; print(i['git_url']);" | tr ';' '\n')

grault · 2019-12-07 10:49:58 0
Print all git repos from a user

in case you could afford installing jq
This is sample output - yours may be different.
0

curl -s "https://api.github.com/users/<username>/repos?per_page=1000" | jq '.[].git_url'

grault · 2019-12-07 10:48:32 1
Convert CSV to JSON with miller

Using the csv tool `miller` you can transform a csv file into a json array of objects, where the properties are the values of the csv header line and the values are the values of the subsequent lines. Show Sample Output
This is sample output - yours may be different.
```
[
 { "H1": "a1", "H2": "a2", "H3": "a3" },
 { "H1": "b1", "H2": "b2", "H3": "b3" },
 { "H1": "c1", "H2": "c2", "H3": "c3" }
]
```
0

mlr --c2j --jlistwrap cat file.csv

pepa65 · 2019-12-06 07:16:58 0
Show top 50 running processes ordered by highest memory/cpu usage refreshing every 1s

http://alvinalexander.com/linux/unix-linux-process-memory-sort-ps-command-cpu for an overview of --sort available values
This is sample output - yours may be different.
1

watch -n1 "ps aux --sort=-%mem,-%cpu | head -n 50"

jgleeson · 2019-12-03 20:51:03 0
Help for building kernel
This is sample output - yours may be different.
-1

cd /usr/src/linux;make help|sed -n 8,30p

wuziduzi · 2019-12-02 23:11:02 0

grep for minus (-) sign

Use flag "--" to stop switch parsing Show Sample Output

-1

grep -- -

knoppix5 · 2019-11-29 23:45:06 0

Print all git repos from a user
This is sample output - yours may be different.
11

curl -s https://api.github.com/users/<username>/repos?per_page=1000 |grep git_url |awk '{print $2}'| sed 's/"$.*$",/\1/'

wuziduzi · 2019-11-19 20:31:19 1
create a nicely formatted example of a shell command and its output

Shell function which takes a bash command as its input, and displays the following formatted output: EXAMPLE: command OUTPUT: output from command Show Sample Output
This is sample output - yours may be different.
```
EXAMPLE:

    example ls -l

OUTPUT:

    EXAMPLE:
    
        ls -l
    
    OUTPUT:
    
        total 0
        -rw-rw-r-- 1 bartonc bartonc 0 Nov 10 13:58 a
        -rw-rw-r-- 1 bartonc bartonc 0 Nov 10 13:58 b
        -rw-rw-r-- 1 bartonc bartonc 0 Nov 10 13:58 c
```
6

example() { echo "EXAMPLE:"; echo; echo " $@"; echo; echo "OUTPUT:"; echo ; eval "$@" | sed 's/^/ /'; }

bartonski · 2019-11-10 19:08:23 0
Host cpu performance

Measure the cpu performance: In-case if the cpu is thermal throttling then you can find it using this command. Check the first line of the output. Example: Doing md5 for 3s on 16 size blocks: 11406892 md5's in 2.98s ? #(When cpu is not throttling) Doing md5 for 3s on 16 size blocks: 110692 md5's in 2.98s ?? #(When cpu is thermal throttling) Practical use case: Once we had cooling outage in data center which caused thermal throttling in some of the worker nodes. We used this tool to prove that some servers are not performing well because of the cpu thermal throttling. Show Sample Output
This is sample output - yours may be different.
```
Doing md5 for 3s on 16 size blocks: 11406892 md5's in 2.98s
Doing md5 for 3s on 64 size blocks: 8479926 md5's in 2.99s
Doing md5 for 3s on 256 size blocks: 4800618 md5's in 2.99s
Doing md5 for 3s on 1024 size blocks: 1719000 md5's in 2.98s
Doing md5 for 3s on 8192 size blocks: 249448 md5's in 2.99s
```
7

openssl speed md5

kharthigeyan · 2019-11-07 16:30:30 0
Make window transparent (50% opacity) in Gnome shell

Click window to change its opacity. Source: https://unix.stackexchange.com/a/494289
This is sample output - yours may be different.
0

xprop -format _NET_WM_WINDOW_OPACITY 32c -set _NET_WM_WINDOW_OPACITY 0x7FFFFFFF

yoyoyojomo · 2019-10-31 20:44:21 0
Set RGB gamma of secondary monitor

This command first determines whether a second screen is connected. If this is the case, it sets the screen's RGB gamma via xrandr. Useful for cheap or slightly defective monitors with a tint. In this example a yellowing/champagne color deviation is compensated for by decreasing the red and the green portion of the image.
This is sample output - yours may be different.
0

secondscreen=$(xrandr -q | grep " connected" | sed -n '2 p' | cut -f 1 -d ' '); [ "$secondscreen" ] && xrandr --output $secondscreen --gamma 0.6:0.75:1

lordtoran · 2019-10-28 13:12:08 0
Massive change of file extension (bash)

Change the file extension in batch. Useful to create output file names with same input name but distinct extension by including logic inside the loop
This is sample output - yours may be different.
1

for file in *.txt; do mv "$file" "${file%.txt}.xml"; done

neomefistox · 2019-10-24 04:35:10 0
Find dupe files by checking md5sum
This is sample output - yours may be different.
4

find /glftpd/site/archive -type f|grep '([0-9]\{1,9\})\.[^.]\+$'|parallel -n1 -j200% md5sum ::: |awk 'x[$1]++ { print $2 " :::"}'|sed 's/^/Dupe: /g'|sed 's,Dupe,\x1B[31m&\x1B[0m,'

wuziduzi · 2019-10-22 16:02:15 0

Top 10 Memory Processes (reduced output to applications and %usage only)

Top 10 Memory Processes (reduced output to applications and %usage only) Show Sample Output

ps aux | sort -rk 4,4 | head -n 10 | awk '{print $4,$11}'

n0a110w · 2019-10-20 22:52:55 0

Console clock

You will see it on the corner of your running terminal. Show Sample Output
This is sample output - yours may be different.
```
 Sun Oct 20 05:48:44 JST 2019
```
2

while sleep 1; do tput sc; tput cup 0 $(($(tput cols)-29)); date; tput rc; done &

rakibfiha · 2019-10-19 20:50:48 0
Hide or show Desktop Icons on MacOS

Hides all Files and Folders on the MacOS Desktop. To show files and folders, type "true" instead of "false". "Finder" at the end is case sensitive, "finder" doesn’t work
This is sample output - yours may be different.
0

defaults write com.apple.finder CreateDesktop -bool false;killall Finder

vranx · 2019-10-18 12:13:56 0
Rename all files in a directory to the md5 hash
This is sample output - yours may be different.
0

for i in *; do sum=$(md5sum $i); mv -- "$i" "${sum%% *}"; done

malsploit · 2019-10-17 08:46:22 0
Print the DATE in ISO format.(MAC OS CATALINA / BASH)

Print date in iso format. Created and tested on MAC OS CATALINA. Darwin Kernel Version 19.0.0: Thu Oct 17 16:17:15 PDT 2019; root:xnu-6153.41.3~29/RELEASE_X86_64 x86_64 bash Show Sample Output
This is sample output - yours may be different.
```
2019-10-13T15:49:45+0200
2019-10-13T15:51:31+0200
```
0

date +%Y-%m-%dT%H:%M:%S%z

ThinWarrior · 2019-10-13 13:49:58 4

Print github url for the current url

Works for repos cloned via ssh or https. Show Sample Output

git remote -v | sed -n '/github.com.*push/{s/^[^[:space:]]\+[[:space:]]\+//;s|git@github.com:|https://github.com/|;s/\.git.*//;p}'

bartonski · 2019-10-11 16:50:22 0

List the binaries installed by a Debian package

GNU grep's perl-compatible regular expression(PCRE).
This is sample output - yours may be different.
0

binaries () { dpkg -L "$1" | grep -Po '.*/bin/\K.*'; }

metropolis · 2019-10-05 10:52:15 0
List the binaries installed by a Debian package

This shell function displays a list of binaries contained in an installed package; works on Debian based Linux distributions. Show Sample Output
This is sample output - yours may be different.
```
$ binaries findutils
find
xargs
```
0

binaries () { for f in $(dpkg -L "$1" | grep "/bin/"); do basename "$f"; done; }

lordtoran · 2019-10-05 10:37:51 0
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Bash alias for creating screen session containing IRSSI, named irssi, while checking if existing session is created

Bash alias for easy irssi within screen, attempts to attach to existing irssi session, if one exists, otherwise creates one - Including wipe for when system reboots and leaves "dead" session.

Monitor dynamic changes in the dmesg log.

Other logs can be monitored similarly, e.g. $ watch "tail -15 /var/log/daemon.log"

Which processes are listening on a specific port (e.g. port 80)

swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

Docker: Remove all exited docker container

read unixtimestamp with festival

you will hear how many seconds since 1.1.1970 in english words with billions, millions and thousands. this is very useful, if you want to get over to use the unixtimestamp instead of the 24 hour clock in your dayly life

Find all files with root SUID or SGID executables

Discovering all executables on your system that can be run as another user, especially root, is critical for system security. The above command will find those files with have SUID or SGID bits set and are owned by the root user or group.

Killing processes with your mouse in an infinite loop

Useful for quickly cleaning your Desktop. Nice joke if launched at startup.

Re-emerge all ebuilds with missing files (Gentoo Linux)

This loops through all installed ebuilds and checks if every file that should be installed is still there and if not adds it to emerge. It includes a verbose output to stderr too. If you have packages installed that have whitespace in their filenames you have to change the IFS to "newline".

What is my ip?

reset Mageia urpmi media sources to network only

On Mageia (and Mandriva) Linux, this command will clear your existing urpmi configuration and configure it to use only network sources. It can be useful after you have installed from CD/DVD and don't want to continually be prompted to insert CD/DVD each time you install a package. acknowledgement: blino

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