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SSH connection through host in the middle
This is sample output - yours may be different.
1

ssh -J user@reachable_host user@unreacheable_host

renich · 2019-08-14 17:29:45 0

Find all clients connected to HTTP or HTTPS ports

It finds, specifically, the connections to the HTTP and HTTPS ports as source ports. You can check for destination ports as well. Show Sample Output

ss -o state established '( dport = :http or sport = :https )'

renich · 2019-08-14 17:28:13 0

Check whether laptop is running on battery or cable

1 = on ac, 0 = on bat
This is sample output - yours may be different.
0

cat /sys/class/power_supply/AC/online

wuziduzi · 2019-08-13 21:31:00 0
Check whether laptop is running on battery or cable

Just an alternative for `acpi -b` Show Sample Output
This is sample output - yours may be different.
```
Discharging 46%
```
1

eval "$(printf "echo %s \$((%i * 100 / %i))\n" $(cat $(find /sys -name energy_now 2>/dev/null | head -1 | xargs dirname)/{status,energy_{now,full}}))%"

glaudiston · 2019-08-10 16:50:12 0
Using a single sudo to run multiple && arguments

Bash's here string
This is sample output - yours may be different.
4

sudo -s <<< 'apt update -y && apt upgrade -y'

metropolis · 2019-08-07 14:03:30 0
jump to home dir and list all, not older than 3 days, with full-path, hidden/non-hidden files/subdirectories

Number of days back: change/append arbitrary amount of '\|'$[$(date +%Y%j)-x] expressions or specify any n-th day before today for a single day (you have to replace x with 3, 4, 5, whatever ... above I replaced it with 1 and 2 to get listing for yesterday and day before yesterday and 0 for today was not necessary, so left out). Q: How to narrow to *.pdf , *.png, *.jpg, *.txt, *.doc, *.sh or any type of files only? A: Pipe to grep at the end of command. Even shorter: cd && day=3;for a in $(seq $day -1 0);do tree -aicfnF --timefmt %Y%j-%d-%b-%y|grep $[$(date +%Y%j)-$a];done Here it's only needed to change amount of variable day to list period of days back - here is set to three days back (the seq command is adjusted for listing the oldest stuff first). Show Sample Output
This is sample output - yours may be different.
```
[2019215-03-Aug-19]  ./.config/session/
[2019215-03-Aug-19]  ./.config/session/konsole_2b5b0f704-9942-428b-a3d8-8054efd32b18_1564837706_57870
[2019215-03-Aug-19]  ./.config/session/konsole_23e1f9567-a8ff-42ad-a879-76f7bafb56c3_1564840981_89854
[2019215-03-Aug-19]  ./.config/session/konsole_2e2aea661-fd41-4510-b0b9-1d2c69ef99c7_1564864156_611707
[2019215-03-Aug-19]  ./.config/konsolerc
[2019216-04-Aug-19]  ./.config/dconf/
[2019216-04-Aug-19]  ./.config/dconf/user
[2019216-04-Aug-19]  ./.config/briši_me.pdf
```
0

cd && tree -aicfnF --timefmt %Y%j-%d-%b-%y|grep $(date +%Y%j)'\|'$[$(date +%Y%j)-1]'\|'$[$(date +%Y%j)-2]

knoppix5 · 2019-08-04 02:22:24 0
Access folder "-"

If you try to access cd - you go to the last folder you were in.
This is sample output - yours may be different.
0

cd -- -

ismabsd · 2019-08-02 07:20:29 0
Remove abstracts from a bibtex file

Remove lines from a bibtex file that have abstracts in them.
This is sample output - yours may be different.
0

sed '/^\s*abstract\s*=\s*{[^\n]*},$/ d' input.bib > output.bib

mirams · 2019-08-01 13:59:38 1
Using a single sudo to run multiple && arguments

This will also work with bash instead of sh shell sudo bash -c 'apt update -y && apt upgrade -y'
This is sample output - yours may be different.
0

sudo sh -c 'apt update -y && apt upgrade -y'

ioshield · 2019-07-31 04:39:40 0
shell bash iterate number range with for loop

"seq" has an additional parameter to use as INCREMENT. # seq FIRST INCREMENT LAST https://linux.die.net/man/1/seq Show Sample Output
This is sample output - yours may be different.
```
1
2
3
4
5
```
0

for i in $(seq 1 5) ; do echo $i ; done

guilsson · 2019-07-29 18:34:12 0
shell bash iterate number range with for loop
This is sample output - yours may be different.
0

seq 10 20

Thierry · 2019-07-28 21:47:07 0
Faciliate the work for lftp ('all' is needed if you wanna use it with getopts, otherwise its enough with the lftp line)

Add this to a script and you can do ./scriptname site help or ./scriptname mput etc etc.
This is sample output - yours may be different.
0

all="$(echo -e $*|awk '{for(i=3;i<=NF;++i)print $i}'|xargs)"; lftp -e open <HOSTNAME> -p <PORT> -u <USER>:<PASSWORD> -e "$all;exit"

wuziduzi · 2019-07-28 18:48:28 0
Block all brute force attacks in realtime (IPv4/SSH)

Was to long with a loop, use a while loop for have it running 24/7
This is sample output - yours may be different.
0

inotifywait -r -q --format %w /var/log/auth.log|grep -i "Failed pass"|tail -n 1|grep -oE '\b([0-9]{1,3}\.){3}[0-9]{1,3}';iptables -I INPUT -i eth0 -s "$(cat /var/log/auth.log|grep "authentication failure; l"|awk -Frhost= '{print $2}'|tail -n 1)" -j DROP

wuziduzi · 2019-07-28 18:42:23 1
Block all IPv4 addresses that has brute forcing our ssh server

For ipv6 use: grep -oE "\b([0-9A-Fa-f]{1,4}:){7}[0-9A-Fa-f]{1,4}\b"
This is sample output - yours may be different.
0

for idiots in "$(cat /var/log/auth.log|grep invalid| grep -oE '\b([0-9]{1,3}\.){3}[0-9]{1,3}\b')"; do iptables -A INPUT -s "$idiots" -j DROP; done

wuziduzi · 2019-07-28 18:29:14 1
shell bash iterate number range with for loop

Bash's arithmetic evaluation.
This is sample output - yours may be different.
1

for((i=1;i<=10;i++)){ echo $i; }

metropolis · 2019-07-28 02:32:09 0
shell bash iterate number range with for loop
This is sample output - yours may be different.
1

for i in {1..10}; do echo $i; done

bakhru · 2019-07-28 01:09:35 0
Which processes are listening on a specific port (e.g. port 80)
This is sample output - yours may be different.
0

netstat -nap|grep 80|grep LISTEN

bakhru · 2019-07-28 01:08:45 0
shell bash iterate number range with for loop
This is sample output - yours may be different.
0

rangeBegin=10; rangeEnd=20; for ((numbers=rangeBegin; numbers<=rangeEnd; numbers++)); do echo $numbers; done

forouharid · 2019-07-27 21:04:27 0
shell bash iterate number range with for loop

iterating range of numer with for loop in shell or bash Show Sample Output
This is sample output - yours may be different.
```
10
11
12
13
14
15
16
17
18
19
20
```
-1

rangeBegin=10; rangeEnd=20; for numbers in $(eval echo "{$rangeBegin..$rangeEnd}"); do echo $numbers;done

aysadk · 2019-07-26 09:19:44 1
bash test check validate if variable is number

to test check if given variable is a digit / number Show Sample Output
This is sample output - yours may be different.
```
error: Not a number
```
1

varNUM=12345; re='^[0-9]+$'; if ! [[ $varNUM =~ $re ]] ; then echo "error: Not a number"; fi

aysadk · 2019-07-26 09:15:37 1
iso to USB with dd and show progress status

Does the same but shows nicely progress in real time with correct Size in %. But also needs the packages sudo,dd,pv and dialog.
This is sample output - yours may be different.
0

image="file.iso";drive="/dev/null";sudo -- sh -c 'cat '"${image}"'|(pv -n -s $(stat --printf="%s" '"${image}"')|dd of='"${drive}"' obs=1M oflag=direct) 2>&1| dialog --gauge "Writing Image '"${image}"' to Drive '"${drive}"'" 10 70 7'

fries · 2019-07-25 11:11:45 0
Stage all files for commit except those that are *.config at any level within your git repo [Windows]
This is sample output - yours may be different.
0

git status | Where-Object {$_.Contains('modified') -and !$_.Contains('.config')} | ForEach-Object { git add $_.Replace('modified:','').Trim() }

RaphHaddad · 2019-07-22 06:25:45 0
Delete all local branches that have been merged into master [Windows]
This is sample output - yours may be different.
-1

git branch --merged origin/master | Where-Object { !$_.Contains('master') } | ForEach-Object { git branch -d $_.trim() }

RaphHaddad · 2019-07-22 06:24:55 0
Initialise git in working directory with latest Visual Studio .gitignore [Windows]
This is sample output - yours may be different.
-1

git init; (Invoke-WebRequest https://raw.githubusercontent.com/github/gitignore/master/VisualStudio.gitignore -UseBasicParsing).Content | Out-File -FilePath .gitignore -Encoding utf8; git add -A

RaphHaddad · 2019-07-22 06:24:33 0
Line Separator That is Width of Terminal

Creates a line seperator that will be the width of your window. Show Sample Output
This is sample output - yours may be different.
```
???? CL test                                                                                         
============================================== test ==============================================
```
1

CL () { WORDS=$@; termwidth="$(tput cols)"; padding="$(printf '%0.1s' ={1..500})"; printf '%*.*s %s %*.*s\n' 0 "$(((termwidth-2-${#WORDS})/2))" "$padding" "$WORDS" 0 "$(((termwidth-1-${#WORDS})/2))" "$padding"; }

Sabz69 · 2019-07-20 20:39:10 2
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calulate established tcp connection of local machine

If you want prepend/append text just wrap in echo: $echo Connected: `netstat -an|grep -ci "tcp.*established"`

see who's using DOM storage a/k/a Web Storage, super cookies

Someone over at Mozilla dot Org probably said, "I know, let's create a super-duper universal replacement for browser cookies that are persistent and even more creepy and then NOT give our browser users the tools they need to monitor, read, block or selectively remove them!" . This will let you see all the DOM object users in all your firefox profiles. Feel free to toss a `| sort -u` on the end to remove dupes. . I highly recommend you treat these as "session cookies" by scripting something that deletes this sqlite database during each firefox start-up. . note: does not do anything for so-called "flash cookies"

Remove a range of lines from a file

tcpdump whole packets to file in ascii and hex with ip adresses instead of hostname

Find the package that installed a command

List all symbolic links in current directory

Tested with GNU and BSD ls.

Trigger a command each time a file is created in a directory (inotify)

Listens for events in the directory. Each created file is displayed on stdout. Then each fileline is read by the loop and a command is run. This can be used to force permissions in a directory, as an alternative for umask. More details: http://en.positon.org/post/A-solution-to-the-umask-problem%3A-inotify-to-force-permissions

resize all images in a folder

Write comments to your history.

A null operation with the name 'comment', allowing comments to be written to HISTFILE. Prepending '#' to a command will *not* write the command to the history file, although it will be available for the current session, thus '#' is not useful for keeping track of comments past the current session.

Convert a string to "Title Case"

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