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mysql DB size
This is sample output - yours may be different.
2

mysql -u root -pPasswort -e 'select table_schema,round(sum(data_length+index_length)/1024/1024,4) from information_schema.tables group by table_schema;'

opexxx · 2009-10-06 07:10:49 5
Bashbuiltin printf
This is sample output - yours may be different.
0

cat file.txt | while read line; do printf "%7.2f -> %7.2f\n" $line; done

opexxx · 2009-10-06 07:09:23 7
ffmpeg vhook imlib2.so
This is sample output - yours may be different.
-1

ffmpeg -i input.flv -vhook '/usr/lib/vhook/imlib2.so -c white -x 250 -y H+(-1.8*N+80) -t Hallo! -A max(0,255-exp(N/16))' -sameq -acodec copy output.flv

opexxx · 2009-10-06 07:08:02 3
List open TCP/UDP ports
This is sample output - yours may be different.
2

lsof -i tcp -i udp

raspi · 2009-10-06 02:27:25 8
Print text string vertically, one character per line.
This is sample output - yours may be different.
3

echo "vertical text" | fold -1

zude · 2009-10-05 23:20:14 4
Laminate a file

Consider this file : laminate this file with awk hello to commandlinefu I can use awk substring to laminate words : lamin this file with hello comma Similar to http://www.commandlinefu.com/commands/view/2000/laminate-files-line-by-line Show Sample Output
This is sample output - yours may be different.
```
lamin
this
file
with 
hello
comma
```
-2

awk '{print(substr($0,1,5))}' file

servermanaged · 2009-10-05 18:58:49 4
Generate SHA1 hash for each file in a list

All output is placed in file SHA1SUMS which you can later check with 'sha1sum --check'. Works on most Linux distros where 'sha1sum' is installed.
This is sample output - yours may be different.
2

find . -type f -exec sha1sum {} >> SHA1SUMS \;

gpenguin · 2009-10-05 18:33:59 6
Benchmark report generator

Nicely display in html format a detailed report of the machine, including cpu benchmarks.
This is sample output - yours may be different.
2

hardinfo -am benchmark.so -f html > report.html

servermanaged · 2009-10-05 17:41:25 5
Changing the terminal title to the last shell command

Found another way, more compatible. Tested with xterm, aterm, gnome-terminal and rxvt (where it sets the window title) and guake (where it doesn't - after all, guake does not show the window title).
This is sample output - yours may be different.
0

[[ "x$TERM" == "xrxvt" || "x$XTERM_VERSION" == xXTerm* || "x$COLORTERM" == 'gnome-terminal' && "x$SHELL" == */bin/zsh ]] && preexec () { print -Pn "\e]0;$1\a" }

Patola · 2009-10-05 15:39:45 3
Changing the terminal title to the last shell command

Found the same command for zsh in http://www.davidpashley.com/articles/xterm-titles-with-bash.html - changed it a bit so that the behaviour is the same
This is sample output - yours may be different.
1

if [ "$SHELL" = '/bin/zsh' ]; then case $TERM in rxvt|*term|linux) preexec () { print -Pn "\e]0;$1\a" };; esac; fi

Patola · 2009-10-05 15:21:42 3
Force an fsck on reboot

Force an fsck on reboot. Useful on a system where / has mounted read-only because of file system issues.
This is sample output - yours may be different.
2

shutdown -rF now

SuperFly · 2009-10-05 15:02:36 9
Kill processes that have been running for more than a week
This is sample output - yours may be different.
12

find /proc -user myuser -maxdepth 1 -type d -mtime +7 -exec basename {} \; | xargs kill -9

sharfah · 2009-10-05 14:49:51 9

List open TCP/UDP ports

Works only on Linux. Last option (n) turn name of service resolving (/etc/services) off. Show Sample Output

netstat -ltun

Decoy · 2009-10-05 08:39:03 3

List open TCP/UDP ports
This is sample output - yours may be different.
0

netstat -anp --tcp --udp | grep LISTEN

Crewe · 2009-10-05 08:27:10 4
Get a MySQL DB dump from a remote machine

This command will dump a database on a remote stream to stdout, compress it, stream it to your local machine, decompress it and put it into a file called database.sql.You could even pipe it into mysql on your local machine to restore it immediately. I had to use this recently because the server I needed a backup from didn't have enough disk space.
This is sample output - yours may be different.
8

ssh user@host "mysqldump -h localhost -u mysqluser -pP@$$W3rD databasename | gzip -cf" | gunzip -c > database.sql

daws · 2009-10-05 00:57:51 10
Grep auth log and print ip of attackers

Work for me on CentOS, grep and print ip addresses of ssh bruteforce attempts Show Sample Output
This is sample output - yours may be different.
```
192.33.68.00
192.168.1.66
155.63.49.15
```
1

egrep 'Failed password for invalid' /var/log/secure | awk '{print $13}' | uniq

servermanaged · 2009-10-04 18:08:13 7
Encrypted archive with openssl and tar

The lifehacker way: http://lifehacker.com/software/top/geek-to-live--encrypt-your-data-178005.php#Alternate%20Method:%20OpenSSL "That command will encrypt the unencrypted-data.tar file with the password you choose and output the result to encrypted-data.tar.des3. To unlock the encrypted file, use the following command:" openssl des3 -d -salt -in encrypted-data.tar.des3 -out unencrypted-data.tar Show Sample Output
This is sample output - yours may be different.
```
enter des-ede3-cbc encryption password:
Verifying - enter des-ede3-cbc encryption password:
```
3

openssl des3 -salt -in unencrypted-data.tar -out encrypted-data.tar.des3

berot3 · 2009-10-03 03:50:46 9

Generate SHA1 hash for each file in a list

List files and pass to openssl to calculate the hash for each file. Show Sample Output

ls [FILENAME] | xargs openssl sha1

m00dimus · 2009-10-03 02:05:43 4

On screen display of a command.

This is very useful if you need to show someone some text from a distance. (Like someone standing over your shoulder...) I'd recommend aliasing it to something like: alias osd_cat="osd_cat -o 400 -s 8 -c blue -d 60 -f -*-bitstream\ vera\ sans-*-*-*--200-*-*-*-*-*-*-*" xosd is the utility that provides osd_cat.
This is sample output - yours may be different.
7

date|osd_cat

din7 · 2009-10-02 18:26:46 9
Transfer sqlite3 data to mysql

Filters out all non-insert SQL operations (we couldn't filter out only lines starting with "INSERT" because inserts can span multiple lines), quotes table names with backticks, saves dump to a file and pipes it straight to mysql. This transfers only data--it expects your schema is already in place. In Ruby on Rails, you can easily recreate the schema in MySQL with "rake db:schema:load RAILS_ENV=production".
This is sample output - yours may be different.
0

sqlite3 mydb.sqlite3 '.dump' | grep -vE '^(BEGIN|COMMIT|CREATE|DELETE)|"sqlite_sequence"' | sed -r 's/"([^"]+)"/`\1`/' | tee mydb.sql | mysql -p mydb

mislav · 2009-10-02 14:40:51 4
Verify MD5SUMS but only print failures

All valid files are withheld so only failures show up. No output, all checks good.
This is sample output - yours may be different.
6

md5sum --check MD5SUMS | grep -v ": OK"

gpenguin · 2009-10-02 05:21:17 7
FAST Search and Replace for Strings in all Files in Directory

I needed a way to search all files in a web directory that contained a certain string, and replace that string with another string. In the example, I am searching for "askapache" and replacing that string with "htaccess". I wanted this to happen as a cron job, and it was important that this happened as fast as possible while at the same time not hogging the CPU since the machine is a server. So this script uses the nice command to run the sh shell with the command, which makes the whole thing run with priority 19, meaning it won't hog CPU processing. And the -P5 option to the xargs command means it will run 5 separate grep and sed processes simultaneously, so this is much much faster than running a single grep or sed. You may want to do -P0 which is unlimited if you aren't worried about too many processes or if you don't have to deal with process killers in the bg. Also, the -m1 command to grep means stop grepping this file for matches after the first match, which also saves time. Show Sample Output
This is sample output - yours may be different.
```
Cpu(s): 28.1% us,  9.5% sy,  3.0% ni, 48.6% id,  9.9% wa,  0.2% hi,  0.7% si

  PID NI  %CPU %MEM  COMMAND
20707 19  0.0  0.1   sh -c S=askapache;R=htaccess;find . -type f|xargs -P5 -iFF grep -l -m1 "$S" FF|xargs -P5 -iFF sed -i -e s%${S}%${R}% FF
20708 19  2.0  0.0   find . -type f
20709 19  2.0  0.0   xargs -P5 -iFF grep -l -m1 askapache FF
20710 19  0.5  0.0   xargs -P5 -iFF sed -i -e s%askapache%htaccess% FF
23291 19  0.0  0.0   grep -l -m1 askapache ./servers/util_ldap_cache_mgr.c.html
23293 19  0.0  0.0   grep -l -m1 askapache ./servers/util_md5.c.html
23308 19  0.0  0.0   grep -l -m1 askapache ./servers/waitio.c.html
23310 19  0.0  0.0   grep -l -m1 askapache ./servers/winconfig.h.html
23311 19  0.0  0.0   grep -l -m1 askapache ./servers/wintty.c.html
23265 19  0.0  0.1   sed -i -e s%askapache%htaccess% ./servers/apr_uri.h.html
23266 19  0.0  0.0   sed -i -e s%askapache%htaccess% ./servers/apr_uri.c.html
23267 19  0.0  0.0   sed -i -e s%askapache%htaccess% ./servers/apr_time.h.html
23268 19  0.0  0.0   sed -i -e s%askapache%htaccess% ./servers/apr_user.h.html
23269 19  0.0  0.0   sed -i -e s%askapache%htaccess% ./servers/apr_strmatch.h.html
```
10

sh -c 'S=askapache R=htaccess; find . -mount -type f|xargs -P5 -iFF grep -l -m1 "$S" FF|xargs -P5 -iFF sed -i -e "s%${S}%${R}%g" FF'

AskApache · 2009-10-02 05:03:10 7
generate a unique and secure password for every website that you login to

usage: sitepass MaStErPaSsWoRd example.com description: An admittedly excessive amount of hashing, but this will give you a pretty secure password, It also eliminates repeated characters and deletes itself from your command history. tr '!-~' 'P-~!-O' # this bit is rot47, kinda like rot13 but more nerdy rev # this avoids the first few bytes of gzip payload, and the magic bytes. Show Sample Output
This is sample output - yours may be different.
```
$ sitepass  iHeartLinux commandlinefu.com
^Uk+j{,jl~
```
13

sitepass() { echo -n "$@" | md5sum | sha1sum | sha224sum | sha256sum | sha384sum | sha512sum | gzip - | strings -n 1 | tr -d "[:space:]" | tr -s '[:print:]' | tr '!-~' 'P-~!-O' | rev | cut -b 2-11; history -d $(($HISTCMD-1)); }

grokskookum · 2009-10-01 20:14:57 12
Get length of array in zsh

Returns the index of the last element in the array. Show Sample Output
This is sample output - yours may be different.
```
%foo=(a b c d e)
%echo $foo[(I)$foo[-1]]
5
```
-1

$foo[(I)$foo[-1]]

andrew112358 · 2009-10-01 20:07:14 5
Smart renaming

Use 'mmv' for mass renames. The globbing syntax is intuitive.
This is sample output - yours may be different.
9

mmv 'banana_*_*.asc' 'banana_#2_#1.asc'

hfs · 2009-10-01 13:49:40 4
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What's this?

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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"

Check apache config syntax and restart or edit the file

Checks the apache configuration syntax, if is OK then restart the service otherwise opens the configuration file with VIM on the line where the configuration fails.

Break lines after, for example 78 characters, but don't break within a word/string

Per default, linux/unix shells are configured with a width of 80 characters. If you like to edit a phrase or string on a line with more than 80 characters it might take long to go there (for example a line with 1000 characters and you like to edit the 98th word which is character 598-603). Maybe you might wish to use 78 characters, because if you forward the text via mail and the text will be quoted (2 extra characters at the beginning to the line "> "), you use 80 characters, otherwise 82, which are lame.

Set laptop display brightness

Run as root. Path may vary depending on laptop model and video card (this was tested on an Acer laptop with ATI HD3200 video). $ cat /proc/acpi/video/VGA/LCD/brightness to discover the possible values for your display.

Synchronize date and time with a server over ssh

using -u is better for standardizing date output and timezones, for servers in different timezones.

attach to bash shell in the last container you started

Apply fade effect to a audio

fade [type] fade-in-length [stop-time [fade-out-length]] Apply a fade effect to the beginning, end, or both of the audio. An optional type can be specified to select the shape of the fade curve: q for quarter of a sine wave, h for half a sine wave, t for linear (`triangular') slope, l for logarithmic, and p for inverted parabola. The default is logarithmic. A fade-in starts from the first sample and ramps the signal level from 0 to full volume over fade-in-length sec? onds. Specify 0 seconds if no fade-in is wanted. For fade-outs, the audio will be truncated at stop-time and the signal level will be ramped from full volume down to 0 starting at fade-out-length seconds before the stop-time. If fade-out-length is not specified, it defaults to the same value as fade-in-length. No fade-out is performed if stop-time is not specified. If the file length can be determined from the input file header and length-changing effects are not in effect, then 0 may be specified for stop-time to indicate the usual case of a fade-out that ends at the end of the input audio stream. All times can be specified in either periods of time or sample counts. To specify time periods use the format hh:mm:ss.frac format. To specify using sample counts, specify the number of samples and append the letter `s' to the sample count (for example `8000s').

Happy Days

This never gets old

Lint Git unstaged PHP files

Checks for syntax errors in PHP files modified in current working copy of a Git repository.

Docker.io Stop and Remove all processes

Will stop all running containers, then remove all containers **This isn't for selectively handling containers, it removes everything**

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