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Monitor iptables in realtime
This is sample output - yours may be different.
0

watch -n1 iptables -vnL

Creek · 2014-07-14 21:06:52 7
Recursively find files over a certain age and list in descending size order
This is sample output - yours may be different.
0

find . -mtime +7 -type f -print0 | xargs -0 ls -Sshl1

bradym · 2015-02-26 20:25:15 8
Funny way to use cowsay to offend people
This is sample output - yours may be different.
0

fortune | cowsay -f sodomized-sheep

symgryph · 2016-02-07 08:13:56 11
Convert a pdf image to a high-quality PNG
This is sample output - yours may be different.
0

convert -density 300 -trim image.pdf -quality 100 image.png

siddharthmv · 2017-03-16 19:49:07 21
Check if loopback network interface is working
This is sample output - yours may be different.
0

sudo tcpdump -i lo -nv ip

Dmitry · 2018-05-16 12:23:12 185
Add new file under svn version control.

convenience.
This is sample output - yours may be different.
0

svn st | grep ^\? | awk '{print $2}' | xargs svn add

dealforest · 2009-02-19 11:58:44 8
Resets terminal in its original state

Resets a scrambled terminal into its orignal state.
This is sample output - yours may be different.
0

^[c (ctrl-v esc-c)

angrox · 2009-03-18 15:15:24 13
append content of a file to itself

The command `cat file >> file` failes with the following error message: cat: file: input file is output file `tee` is a nice workaround without using any temporary files. Show Sample Output
This is sample output - yours may be different.
```
echo "Just one line" >> file
cat file
> Just one line
cat file | tee >> file
cat file
> Just one line
> Just one line
```
0

cat file | tee >> file

GeckoDH · 2009-07-30 07:34:03 7
Say no to overwriting if cp -i is the default alias.
This is sample output - yours may be different.
0

/bin/cp -n <from> <to>

bunam · 2010-09-25 07:02:42 3
Find and edit multiple files given a regex in vim buffers

In this case, we'll be editing every PHP file from the current location down the tree. You can show all the files in the vim buffer with :buffers which outputs something like, :buffers 1 %a "./config/config.php" line 1 2 "./lib/ws-php-library.php" line 0 3 "./lib/css.php" line 0 4 "./lib/mysqldb.class.php" line 0 5 "./lib/config.class.php" line 0 6 "./lib/actions.php" line 0 Press ENTER or type command to continue If you'd like to edit ./lib/mysqldb.class.php for example, enter :b4 anytime you're editing a file. You can switch back and forth. Show Sample Output
This is sample output - yours may be different.
```
You are thrown into the first vim buffer. The contents of that file will be displayed in vim ready to edit.
```
0

vim `find . -iname '*.php'`

wsams · 2011-05-11 01:19:28 4
OS X: flush DNS cache

Purges DNS cache of OS X. dscacheutil -flushcache does not work since OS X 10.7. Show Sample Output
This is sample output - yours may be different.
```
Logoutput:
mDNSResponder: SIGHUP: Purge cache
```
0

sudo killall -HUP mDNSResponder

Xeno · 2012-05-15 18:33:51 3
Copy your public key to clipboard

from https://bitbucket.org
This is sample output - yours may be different.
0

xclip -sel clip < ~/.ssh/id_rsa.pub

frankowp · 2012-09-11 17:39:49 4

This uses spotlight indices to find files that have recently been added. Other options include underscore separated versions of: this week, this month, this year; today, yesterday. Show Sample Output

mdfind 'kMDItemFSCreationDate >= $time.this_month'

peter4512 · 2012-11-13 12:50:51 4

my ip
This is sample output - yours may be different.
0

curl ip.appspot.com

opexxx · 2013-03-15 13:23:19 4
Find errors and packet loss on network cards

A grep against ethtool to look for common errors and packet loss statistics which network drivers report in their private data, which is queried with ethool -S. This is the current grep used in xsos (https://github.com/ryran/xsos), which I originally contributed and has been improved by the community over time. Show Sample Output
This is sample output - yours may be different.
```
    rx_fw_discards: 1035
```
0

ethtool -S eth0 | egrep "(drop|disc|err|fifo|buf|fail|miss|OOB|fcs|full|frags|hdr|tso).*: [^0]"

suprjami · 2014-07-15 05:27:34 7
oracle-java install with one line ( prompt for sudo if needed)
This is sample output - yours may be different.
0

wget http://www.duinsoft.nl/pkg/pool/all/update-sun-jre.bin && sh ./update-sun-jre.bin

dbiesecke · 2014-11-06 19:00:59 9
Find a file and delete it
This is sample output - yours may be different.
0

find filename -execdir rm "{}" \;

manawyddan · 2015-06-26 10:20:54 11
Convert ogv video to avi using ffmpeg
This is sample output - yours may be different.
0

ffmpeg -i input_demo.ogv -vcodec mpeg4 -qscale 0 -acodec libmp3lame my-demo-video.avi

ceddi · 2016-10-17 18:54:50 21
Individually 7zip all files in current directory
This is sample output - yours may be different.
0

for i in *.*; do 7z a "$i".7z "$i"; done

Romero · 2020-12-07 10:02:42 141
Find which package a file belongs to on Solaris

Find which package a file belongs to on Solaris along with it's packaging system metadata. Show Sample Output
This is sample output - yours may be different.
```
# pkgchk -l -p /etc/release
Pathname: /etc/release
Type: regular file
Expected mode: 0444
Expected owner: root
Expected group: sys
Expected file size (bytes): 239
Expected sum(1) of contents: 15337
Expected last modification: Mar 31 05:44:28 2009
Referenced by the following packages:
        SUNWsolnm
Current status: installed
```
0

pkgchk -l -p <full path to the file>

sengork · 2009-07-04 08:22:11 7
How to watch files

To highlight the difference between screen updates
This is sample output - yours may be different.
0

watch -d 'ls -l'

0disse0 · 2009-09-03 20:12:36 3
snarf is a command line resource grabber.

It can transfer files through the http, gopher, finger, and ftp protocols without user interaction. It is small and fast. Show Sample Output
This is sample output - yours may be different.
```
picture.jpg                [\]       4K
5094 bytes transferred in 0.00 sec (2600.54k/sec)
```
0

snarf http://foo.bar.com/picture.jpg

JackiesJungle · 2009-09-23 04:22:57 4
Testing writing speed with dd
This is sample output - yours may be different.
0

sync; time `dd if=/dev/zero of=bigfile bs=1M count=2048 && sync`

w00binda · 2009-11-19 10:29:03 13
Show the ndd ip settings of a solaris device

This command is jsut for the main IP settings of ndd. if you need ip6 or icmp edit the text within the egrep inclusion area. Felix001 - www.Fir3net.com Show Sample Output
This is sample output - yours may be different.
```
ip_respond_to_echo_broadcast 0
ip_respond_to_echo_multicast 0
ip_respond_to_timestamp 0
ip_send_redirects 0
ip_debug 0
ip_mrtdebug 0
ip_ire_timer_interval 60000
ip_ire_arp_interval 60000
ip_ire_redirect_interval 60000
ip_def_ttl 255
ip_forward_src_routed 0
```
0

for i in `ndd /dev/ip \? | awk '{ print $1 }' | egrep -v "ip6|status|icmp|igmp|\?"` ; do echo $i `ndd -get /dev/ip $i` ; done | grep -v \?

felix001 · 2010-02-15 12:32:33 6
forking a process from gnome-terminal detached from the terminal.
This is sample output - yours may be different.
0

gnome-open . & disown

CodSpirit · 2010-03-22 08:13:01 99
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Find and remove core files

Gets the english pronunciation of a phrase

Usage: say hello world how are you today

Copy/move a bunch of files to dot files and back

connect to X login screen via vnc

the $15 may change for you depending on your distro, etc...

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"

ls -qahlSr # list all files in size order - largest last

I find it useful, when cleaning up deleting unwanted files to make more space, to list in size order so I can delete the largest first. Note that using "q" shows files with non-printing characters in name. In this sample output (above), I found two copies of the same iso file both of which are immediate "delete candidates" for me.

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"

Anti Syn Ddos

Ddos syn attack

list all file extensions in a directory

Works on current directory, with built-in sorting.

sends your internal IP by email

This is useful if you have need to do port forwarding and your router doesn't assign static IPs, you can add it to a script in a cron job that checks if you IP as recently changed or with a trigger script. This was tested on Mac OSX.

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