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Get all upgradable deb packages in a single line

Works for debian and ubuntu based distros. Show Sample Output

apt list --upgradable | grep -v 'Listing...' | cut -d/ -f1 | tr '\r\n' ' ' | sed '$s/ $/\n/'

bugmenot · 2019-12-13 16:16:19 213

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.
-2

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

dasmna · 2019-12-12 15:37:17 92
Print all git repos from a user (only curl and grep)
This is sample output - yours may be different.
2

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

acavagni · 2019-12-11 20:55:13 236
Show all current listening programs by port and pid with SS instead of netstat
This is sample output - yours may be different.
4

ss -plunt

symgryph · 2019-12-09 17:44:55 99
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
```
1

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

symgryph · 2019-12-09 17:43:10 240
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.
0

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 10:49:58 106
Print all git repos from a user

in case you could afford installing jq
This is sample output - yours may be different.
1

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

grault · 2019-12-07 10:48:32 344
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" }
]
```
2

mlr --c2j --jlistwrap cat file.csv

pepa65 · 2019-12-06 07:16:58 106
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.
6

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

jgleeson · 2019-12-03 20:51:03 247

grep for minus (-) sign

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

grep -- -

knoppix5 · 2019-11-29 23:45:06 111

Print all git repos from a user
This is sample output - yours may be different.
14

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

wuseman1 · 2019-11-19 20:31:19 261
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
```
8

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

bartonski · 2019-11-10 19:08:23 125
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
```
10

openssl speed md5

kharthigeyan · 2019-11-07 16:30:30 116
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.
1

xprop -format _NET_WM_WINDOW_OPACITY 32c -set _NET_WM_WINDOW_OPACITY 0x7FFFFFFF

yoyoyojomo · 2019-10-31 20:44:21 84
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.
1

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 13:12:08 307
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.
2

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

neomefistox · 2019-10-24 04:35:10 213
Find dupe files by checking md5sum
This is sample output - yours may be different.
6

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,'

wuseman1 · 2019-10-22 16:02:15 149
Countdown Clock

I find the other timers are inaccurate. It takes some microseconds to perform the date function. Therefore, using date/time math to calculate the time for us results in millisecond accuracy. This is tailored to the BusyBox date function. May need to change things around for GNU date function. Show Sample Output
This is sample output - yours may be different.
```
00:03:00
```
-1

let T=$(date +%s)+3*60;while [ $(date +%s) -le $T ]; do let i=$T-$(date +%s); echo -ne "\r$(date -d"0:0:$i" +%H:%M:%S)"; sleep 0.3; done

davidk · 2019-10-22 15:04:21 140

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 22:52:55 180

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
```
7

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

rakibfiha · 2019-10-19 20:50:48 105
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.
2

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

vranx · 2019-10-18 12:13:56 110
Rename all files in a directory to the md5 hash
This is sample output - yours may be different.
2

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

malsploit · 2019-10-17 08:46:22 88

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 16:50:22 264

List the binaries installed by a Debian package

GNU grep's perl-compatible regular expression(PCRE).
This is sample output - yours may be different.
1

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

metropolis · 2019-10-05 10:52:15 177
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
```
1

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

lordtoran · 2019-10-05 10:37:51 432
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Print all open regular files sorted by the number of file handles open to each.

This command run fine on my Ubuntu machine, but on Red Hat I had to change the awk command to `awk '{print $10}'`.

replace strings in file names

Uses vi style search / replace in bash to rename files. Works with regex's too (I use the following a script to fixup / shorten file names): # Remove complete parenthetical/bracket/brace phrases rename 's/$.*$//g' * rename 's/\[.*\]//g' * rename 's/\{.*\}//g' *

Find biggest 10 files in current and subdirectories and sort by file size

Change host name

With sed you can replace strings on the fly.

Rename files in batch

Convert CSV to JSON

Replace 'csv_file.csv' with your filename.

Runs previous command replacing foo by bar every time that foo appears

To replace foo by bar, but not execute, do ^foo^bar^:p To replace all foo by bar, but not execute, do ^foo^bar^:&:p

Convert file type to unix utf-8

converts encoding of a file to unix utf-8 useful for data files that contain what would be usable ascii text but are encoded as mpeg or some other encoding that prevents you from doing common manipulations like 'sed'

use wget to check if a remote file exists

phpinfo from the command line

show phpinfo(); from the command line

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