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Find all IP connected to my host through TCP connection and count it

Count and Find all IP connected to my host through TCP connection. Show Sample Output
This is sample output - yours may be different.
```
 11 113.179.81.247
 11 58.187.233.193
 12 113.172.21.164
 12 113.23.83.98
 14 115.78.193.153
 15 123.26.19.210
 15 71.22.46.17
 16 125.234.144.101
 17 113.22.133.104
 17 1.54.1.201
```
0

netstat -an |grep ":80" |awk '{print $5}' | sed s/::ffff://g | cut -d: -f1 |sort |uniq -c |sort -n | tail -1000 | grep -v "0.0.0.0"

zeros · 2011-07-28 09:36:08 3
Install 4 new package files

after kernel build with make deb-pkg, I like to install the 4 newest packages that exist in the directory. Beware: might be fewer for you....
This is sample output - yours may be different.
0

sudo dpkg -i `ls -tr *.deb | tail -n4`

_john · 2011-10-09 14:20:11 3
copy GPT partition table from /dev/sda to /dev/sdb

copy GPT partition table from /dev/sda to /dev/sdb, using gptfdisk from http://sourceforge.net/projects/gptfdisk/. The -G command randomizes the UUIDS
This is sample output - yours may be different.
0

sgdisk /dev/sda -R /dev/sdb && sgdisk -G /dev/sdb

flip · 2011-11-15 10:59:02 3
chmod only files

This command finds all files in a folder recursively and sets owner and group to read and write. Leaves all dirs intact. This command does takes care of file names with spaces as well.
This is sample output - yours may be different.
0

find . -type f -print0 | xargs -0 chmod -v gu=rw

Tobbera · 2012-03-22 03:08:53 4
how to scp to another pc on network
This is sample output - yours may be different.
0

sudo scp <file or folder> <name of pc 1>@<IP of pc 2>:

christopherpl · 2012-05-04 17:11:29 3

add untracked/changed items to a git repository before doing a commit and/or sending upstream

Uses the --porcelain option, which is garanteed to be stable among git versions and configurations - also, is way easier to parse. Show Sample Output

git status --porcelain | awk '{print $2}' | xargs git add

brandizzi · 2012-09-05 18:07:26 4

Verify a file has not been tampered with since dpkg installation

Replace "user/sbin/sshd" with the file you would like to check. If you are doing this due to intrusion, you obviously would want to check size, last modification date and md5 of the md5sum application itself. Also, note that "/var/lib/dpkg/info/*.md5sums" files might have been tampered with themselves. Neither to say, this is a useful command. Show Sample Output
This is sample output - yours may be different.
```
/usr/sbin/sshd: OK
```
0

cat /var/lib/dpkg/info/*.md5sums|grep usr/sbin/sshd|sed 's,usr,/usr,'|md5sum -c

Ztyx · 2013-03-12 11:20:48 7
grep for 2 (or more) words anywhere on each line of a file

If you know any two (or more) words are occurring on multiple lines in a file, using a regular expression such as this will help you find them quickly.
This is sample output - yours may be different.
0

grep -E "(.*)(ERROR)(.*)(FAULT)(.*)" log.txt

pioniere · 2013-05-01 15:45:52 6
md5sum for files with bad characters
This is sample output - yours may be different.
0

find ./ -type f -print0 | xargs -0 md5sum

d24m · 2013-07-18 07:18:54 6
Show me all of my Mac App Store apps

Shows the OS X applications downloaded from App Store. Doesn't include manually added apps. Show Sample Output
This is sample output - yours may be different.
```
Xcode.app
```
0

find /Applications -path '*Contents/_MASReceipt/receipt' -maxdepth 4 -print |sed 's#.app/Contents/_MASReceipt/receipt#.app#g; s#/Applications/##'

bugmenot · 2013-09-28 15:44:32 25
find which lines in a file are longer than N characters

Filter out lines of input that contain 72, or fewer, characters. "sed -n" : don't print lines by default "/^.\{73,\}/" : find lines that start with 73 (or more) characters "p" : print them Show Sample Output
This is sample output - yours may be different.
```
$ ls /etc | sed -n "/^.\{73,\}/p"
-rw-r--r--.  1 root     root       4646 Mar  5 13:05 DIR_COLORS.lightbgcolor
-rw-r--r--.  1 root     root        863 Sep  2  2013 dleyna-renderer-service.conf
-rw-r--r--.  1 root     root        371 Mar  8 22:57 libguestfs-tools.conf
-rw-r--r--.  1 root     root       5122 Dec 24 06:57 makedumpfile.conf.sample
```
0

sed -n "/^.\{73,\}/p" < /path/to/file

flatcap · 2014-03-20 12:31:57 6
Get a list of all valid ip address in a local network?

you need to have nmap installed sudo apt-get install nmap -y sudo yum install nmap -y Show Sample Output
This is sample output - yours may be different.
```
Starting Nmap 6.40 ( http://nmap.org ) at 2014-07-08 09:37 BST
Nmap scan report for 192.168.1.50
Host is up (0.00012s latency).
Nmap scan report for pedromsluz-Z97-HD3.lan (192.168.1.84)
Host is up (0.00013s latency).
Nmap scan report for 192.168.1.100
Host is up (0.00047s latency).
```
0

nmap -sP 192.168.1.*

narven · 2014-07-08 08:39:14 8
Curl download multiple files using integer range

There's other expansions as well such as `{one,two,three}'. Check the curl docs for more.
This is sample output - yours may be different.
0

curl -O "http://www.dspguide.com/CH[1-34].PDF"

CMCDragonkai · 2015-11-26 06:34:40 12
Disable password expiration and clear password history for VMware vcenter appliance

Disable password expiration and clear password history for VMware vcenter appliance
This is sample output - yours may be different.
0

chage -M -1 root; echo "" > /etc/security/opasswd

tsener · 2017-07-30 21:26:43 52
docker build with custom title
This is sample output - yours may be different.
0

docker build --rm=true -t aysadk/mysql-server .

aysadk · 2017-09-19 20:38:27 19
Hide the name of a process listed in the `ps` output

The classical 'ps aux | grep' can do this with one more parameter, the '-v', with means 'NOT' to grep.
This is sample output - yours may be different.
0

ps aux | grep -v name_you_want_to_hide

hugoeustaquio · 2017-11-21 04:22:12 18
Mount a truecrypt drive from a file from the command line non-interactively

This is useful for use in scripts. Note that this will leak your password to ps, so this shouldn't be used on shared machines. Use key files for this
This is sample output - yours may be different.
0

su -c "truecrypt --non-interactive truecrypt-file cryptshare -p PASSWORD"

tatwright · 2009-05-22 21:11:29 4
Emulate perl 'print "#" x 20, "\n"'
This is sample output - yours may be different.
0

printf '%*s\n' 20 | tr ' ' '#'

twfcc · 2009-08-15 22:38:01 3
slice a fixed number of characters from the output of a command, where the width of the slice is the number of characters in $slice
This is sample output - yours may be different.
0

slice(){ cut -c$((${#1}+1))-; }; ls -l | slice "-rw-r--r--"

sputnick · 2009-11-12 22:50:21 8

Show demo of toilet fonts

Demos figlet/toilet fonts in a configurable dir. Show Sample Output

for i in ${TOILET_FONT_PATH:=/usr/share/figlet}/*.{t,f}lf; do j=${i##*/}; toilet -d "${i%/*}" -f "$j" "${j%.*}"; done

trevorj · 2011-12-27 00:49:42 3

Get Total Line Count Of All Files In Subdirectory (Recursive)
This is sample output - yours may be different.
0

find . -type f -name "*.*" -exec cat {} > totalLines 2> /dev/null \; && wc -l totalLines && rm totalLines

philwc · 2012-03-22 13:11:53 3
print unread gmail message
This is sample output - yours may be different.
0

curl -su username:passwd https://mail.google.com/mail/feed/atom | xmlstarlet sel -N x="http://purl.org/atom/ns#" -t -m //x:entry -v 'concat(position(), ":", x:title)' -n

kev · 2012-05-05 14:34:55 5
Autocomplete directories (CWDs) of other ZSH processes

It gives a 'xcd' command for changing directory to one of CWDs of other ZSH processes (typically running in a terminal emulator). Useful for single-windowed terminal emulators like XTerm or Rxvt which don't have ability to pass CWD of one shell to another. Show Sample Output
This is sample output - yours may be different.
```
$ xcd<TAB>
/home/artur                   /proc
/home/artur/Projects          /usr/src/vim  
```
0

function _xterm_cwds() { for pid in $(pidof -- -zsh) $(pidof zsh); do reply+=$(readlink /proc/$pid/cwd) done }; function xcd() { cd $1 }; compctl -K _xterm_cwds xcd

aartur · 2012-07-12 19:59:46 4

GnuPG: Encrypt/Decrypt files

http://runtime-era.blogspot.sg/2012/08/simple-password-encrypted-files-w-gnupg.html Show Sample Output

gpg -c sensitive.txt; gpg sensitive.txt.gpg

evandrix · 2012-09-05 22:52:26 6

quick and easy way of validating a date format of yyyy-mm-dd and returning a boolean

On CentOS at least, date returns a boolean for the common date string formats, including YYYY-MM-DD. In the sample output, you can see various invalid dates returning 0 whereas a simple regex check would return 1 for the invalid dates. -d, --date=STRING display time described by STRING, not `now' The version of date on OS X does not appear to have this same option. Show Sample Output
This is sample output - yours may be different.
```
# if date -d 2006-10-10 >> /dev/null 2>&1; then echo 1; else echo 0; fi
1

# if date -d 2006-40-10 >> /dev/null 2>&1; then echo 1; else echo 0; fi
0

# if date -d 2006-13-10 >> /dev/null 2>&1; then echo 1; else echo 0; fi
0

# if date -d 2006-11-31 >> /dev/null 2>&1; then echo 1; else echo 0; fi
0
```
0

if date -d 2006-10-10 >> /dev/null 2>&1; then echo 1; else echo 0; fi

SteveGoossens · 2013-01-10 10:35:15 7
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Find usb device in realtime

Using this command you can track a moment when usb device was attached.

Mortality Countdown

watch the seconds of your life tick away - replace YYYY-mm-dd HH:MM:ss w/ your birthtime.

Do a search-and-replace in a file after making a backup

cycle through everything sox knows how to read, playing only the first three seconds

I wasted two hours reading the sox documentation and searching on the web for the format of some obscure fscking sound sample, and then finally came up with this. This plays only the first three seconds of your unknown formatted sound file using every one of sox's built-in filetypes. If you don't get an exact match, you may get close. . I could not fit every single type in and keep it under 127 characters, so you will have to replace "..." with the full list obtainable by `$ sox --help` (or try `Show sample output`) . note: /usr/bin/play should be linked to sox on most systems.

Send keypresses to an X application

This is a (last resort) way to automate applications that provide no other ways for automation, it would send 'Hello world' to the currently active window. See the manpage (and the -text and -window entries) for how to send special characters and target specific windows. An example: Using xwininfo, I get the id of my XPlanet background window: alanceil@kvirasim:19:51:0:~> xwininfo xwininfo: Please select the window about which you would like information by clicking the mouse in that window. xwininfo: Window id: 0x3600001 "Xplanet 1.2.0" Absolute upper-left X: 0 (..etc..) Now I use xvkbd to tell it to close itself: xvkbd -xsendevent -window 0x3600001 -text "Q" Obviously, the best way is to put these commands in a shellscript - just make sure to include a short sleep (sleep .1 should suffice) after each xvkbd call, or some programs will become confused.

Multiple SSH Tunnels

Thankfully, the ssh command allows you to specify multiple tunnels through the same server in one command. Remeber if you want a priviliged port on your machine, you must use root or sudo account.

random xkcd comic

i sorta stole this from http://www.shell-fu.org/lister.php?id=878#MTC_form but it didn't work, so here it is, fixed. --- updated to work with jpegs, and to use a fancy positive look behind assertion.

FizzBuzz in one line of Bash

The (in)famous "FizzBuzz" programming challenge, answered in a single line of Bash code. The "|column" part at the end merely formats the output a bit, so if "column" is not installed on your machine you can simply omit that part. Without "|column", the solution only uses 75 characters. The version below is expanded to multiple lines, with comments added. for i in {1..100} # Use i to loop from "1" to "100", inclusive. do ((i % 3)) && # If i is not divisible by 3... x= || # ...blank out x (yes, "x= " does that). Otherwise,... x=Fizz # ...set x to the string "Fizz". ((i % 5)) || # If i is not divisible by 5, skip (there's no "&&")... x+=Buzz # ...Otherwise, append (not set) the string "Buzz" to x. echo ${x:-$i} # Print x unless it is blanked out. Otherwise, print i. done | column # Wrap output into columns (not part of the test).

Short one line while loop that outputs parameterized content from one file to another

The above is an example of grabbing only the first column. You can define the start and end points specifically by chacater position using the following command: $ while read l; do echo ${l:10:40}; done < three-column-list.txt > column-c10-c40.txt Of course, it doesn't have to be a column, or extraction, it can be replacement $ while read l; do echo ${l/foo/bar}; done < list-with-foo.txt > list-with-bar.txt Read more about parameter expansion here: http://wiki.bash-hackers.org/syntax/pe Think of this as an alternative to awk or sed for file operations

Generate random password on Mac OS X

Feel free to put this in your ~/.profile: $ random(){ cat /dev/urandom | env LC_CTYPE=C tr -dc $1 | head -c $2; echo; } Then use it to generate passwords: $ random [:alnum:] 16 Or DNA sequences: $ random ACGT 256

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