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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 12:23:12 184
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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Fill a hard drive with ones - like zero-fill, but the opposite :)

Note: Replace 200000 with drive bytes/512, and /dev/sdx with the destination drive/partition. ;) Note: You may need to install pipebench, this is easy with "sudo apt-get install pipebench" on Ubuntu. The reason I hunted around for the pieces to make up this command is that I wanted to specifically flip all of the bits on a new HDD, before running an Extended SMART Self-Test (actually, the second pass, as I've already done one while factory-zeroed) to ensure there are no physical faults waiting to compromise my valuable data. There were several sites that came up in a Google search which had a zero-fill command with progress indicator, and one or two with a fill-with-ones command, but none that I could find with these two things combined (I had to shuffle around the dd command(s) to get this to happen without wasting speed on an md5sum as well). For reference, these are the other useful-looking commands I found in my search: Zero-fill drive "/dev/sdx", with progress indicator and md5 verification (run sudo fdisk -l to get total disk bytes, then divide by 512 and enter the resulting value into this command for a full wipe) $ dd if=/dev/zero bs=512 count= | pipebench | sudo tee /dev/sdx | md5sum And this command for creating a file filled with ones is my other main source (besides the above command and man pages, that is - I may be a Linux newbie but I do read!): $ tr '\000' '\377' < /dev/zero | dd of=allones bs=1024 count=2k Hope someone finds this useful! :) Cheers, - Gliktch

Dump bash command history of an active shell user.

Periodic Display of Fan Speed with Change Highlights

Uses the lm-sensors package in Linux to display fan speed. Grep RPM is used to discover lines containing the text RPM, and sed is used to edit out everything but the RPM number. The watch utility is used to update the display every 10 seconds and -d highlights any changes from the previous value. The eval function of Bash is used to execute the command enclosed in the ".." string.

Grab just the title of a youtube video

There's another version on here that uses GET but some people don't have lwp-request, so here's an alternative. It's also a little shorter and should work with most youtube URLs since it truncates at the first &

Get your outgoing IP address

should be very consistent cause it's google :-)

Display ncurses based network monitor

Nload is part of nload package, tested under Debian. Nload display network bandwidth statistics, -u m options stands for MBit unit measure.

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.

Capitalize first letter of each word in a string

Ruby ftw

Resume an emerge, and keep all object files that are already built

For Gentoo: If you do not use this command, portage will fetch the source again, and rebuild the hole application from the top. This command make portage keep all files that ar allready built

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