Commands by bugmenot

Commands by bugmenot (78)

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Delete recursively only empty folders on present dir
This is sample output - yours may be different.
3

find ./ -empty -type d -delete

bugmenot · 2012-08-09 13:01:35 0
List recursively only empty folders on present dir
This is sample output - yours may be different.
0

find ./ -empty -type d -print

bugmenot · 2012-08-09 13:01:04 0
Delete empty directories only in present level
This is sample output - yours may be different.
-1

find ./ -maxdepth 1 -empty -type d -delete

bugmenot · 2012-08-09 12:58:46 4
List empty directories only in present level
This is sample output - yours may be different.
0

find ./ -maxdepth 1 -empty -type d -print

bugmenot · 2012-08-09 12:58:06 0
Remove very large or problematic directories under Windows from Command Prompt

When it says "Invalid Directory Name"
This is sample output - yours may be different.
-6

rd /S /Q directory

bugmenot · 2012-08-07 18:08:36 0
Erase to factory a pendrive, disk or memory card, and watch the progress
This is sample output - yours may be different.
6

sudo shred -vz -n 0 /dev/sdb

bugmenot · 2012-08-06 22:37:44 0
Make a list of files, folders and subfolders from windows command prompt

You can redirect the pipe to > file.txt See more here: http://ss64.com/nt/dir.html
This is sample output - yours may be different.
-8

dir /ad /s /b

bugmenot · 2012-08-06 21:37:03 0
Limit the transfer rate of a pipe with pv

-L RATE, --rate-limit RATE Limit the transfer to a maximum of RATE bytes per second. A suffix of "k", "m", "g", or "t" can be added to denote kilobytes (*1024), megabytes, and so on. It must be an integer.
This is sample output - yours may be different.
2

pv /dev/urandom -L 3m -i 0.3 > /dev/null

bugmenot · 2012-07-29 00:46:09 0
Create a tar archive with pax containing a set of files

NOTE that pax goes always recursively, for that reason -d option should be added when you don't want to go recursively into directories.
This is sample output - yours may be different.
0

find path -name '*' -type f | pax -wd > txtarchive.tar

bugmenot · 2012-07-29 00:44:51 0
Create a tar archive with cpio containing a set of files
This is sample output - yours may be different.
0

find path -name '*' -type f | cpio -ov -H ustar -F txtarchive.tar

bugmenot · 2012-07-29 00:44:12 1
Limit the transfer rate and size of data over a pipe

This example will close the pipe after transferring 100MB at a speed of 3MB per second.
This is sample output - yours may be different.
6

cat /dev/urandom | pv -L 3m | dd bs=1M count=100 iflag=fullblock > /dev/null

bugmenot · 2012-07-29 00:42:16 2
Find inside files two different patterns in the same line and for matched files show number of matched lines

The option -print0 for find and -0 for grep help prevent issue with weird characters or spaces in filenames. Furthermore with xargs there is no limited number of arguments that find can throw.
This is sample output - yours may be different.
1

find . -name '*' -type f -print0 | xargs -0 grep -n pattern1 | grep pattern2

bugmenot · 2012-07-29 00:40:06 0
How to run a shell script on a remote host using ftp

You can upload via ftp the script.sh in unix text format, and then upload a file called run.txt to execute once the script. Such script can be multiline. If the script fails a failed.txt will be generated that you can see via ftp.
This is sample output - yours may be different.
0

watch -n10 "if test -e run.txt ; then chmod +x script.sh && ./script.sh && rm run.txt || rm run.txt && echo > failed.txt ; fi"

bugmenot · 2012-07-29 00:38:08 1
Create a tar archive with all files of a certain type found in present dir and subdirs

Note: the tar archive must not exist in order to create it. If exists it will only be updated and no already existent files in present search will still remain in the tar archive. The update option has to be used instead of create because the command tar may be executed more than once depending on the number of arguments that find throws. You can see maximum number of arguments with 'getconf ARG_MAX'
This is sample output - yours may be different.
4

find ./ -type f -name "*.txt" -exec tar uvf myarchives.tar {} +

bugmenot · 2012-07-29 00:35:58 2
Emulating netcat -e (netcat-traditional or netcat-openbsd) with the gnu-netcat

Then just nc servername 2600 and ./script.sh kill the client with ctrl+c. You can reconnect several times. kill the server with exit
This is sample output - yours may be different.
9

mkfifo foo ; nc -lk 2600 0<foo | /bin/bash 1>foo

bugmenot · 2012-07-29 00:33:41 1
Remove from PATH paths containing a string

If there are spaces won't work.
This is sample output - yours may be different.
0

export PATH= $(echo $PATH | tr ':' '\n' | awk '!/matching string/' | paste -sd:)

bugmenot · 2012-07-29 00:30:54 0
grep lines containing two consecutive hyphens
This is sample output - yours may be different.
0

grep "\-\-" file

bugmenot · 2012-07-29 00:26:14 0
Replace duplicate files by hardlinks
This is sample output - yours may be different.
1

fdupes -r -1 Neu | while read line; do j="0"; buf=""; for file in ${line[*]}; do if [ "$j" == "0" ]; then j="1"; buf=$file; else ln -f $buf $file; fi; done; done

bugmenot · 2012-01-20 22:26:54 0
Kick user
This is sample output - yours may be different.
2

killall -u username

bugmenot · 2011-11-24 20:26:38 0
Create strong, but easy to remember password

Why remember? Generate! Up to 48 chars, works on any unix-like system (NB: BSD use md5 instead of md5sum) Show Sample Output
This is sample output - yours may be different.
```
YzFj3mM1YzAjNJQ2
```
23

read -s pass; echo $pass | md5sum | base64 | cut -c -16

bugmenot · 2011-11-24 20:23:47 9
capture selected window

I think, this is a shorter one :)
This is sample output - yours may be different.
1

scrot -s /tmp/file.png

bugmenot · 2011-11-24 20:00:13 0

Display command options without typing --help

Type out the command and simply press to see the list of options for that command without having to type --help. Show Sample Output

-7

<Ctrl+o>

bugmenot · 2011-08-19 00:09:53 9

Generate an XKCD #936 style 4 word password

The first grep rejects capitalised words since the dict has proper nouns in it that you mightn't want to use. The second grep rejects words with ending in apostrophe s, and the third forces the words to be at least 15 characters long. Show Sample Output
This is sample output - yours may be different.
```
counterproductive unreasonableness multimillionaires extemporaneously
```
-2

cat /usr/share/dict/words | grep -P ^[a-z].* | grep -v "'s$" | grep -Pv ^.\{1,15\}$ | shuf -n4 | tr '\n' ' ' | sed 's/$/\n/'

bugmenot · 2011-08-15 01:03:48 3
Countdown Clock
This is sample output - yours may be different.
0

MIN=10 && for i in $(seq $(($MIN*60)) -1 1); do printf "\r%02d:%02d:%02d" $((i/3600)) $(( (i/60)%60)) $((i%60)); sleep 1; done

bugmenot · 2011-02-20 10:24:22 0
Backup to tape, rewind and check md5

Backups $DIR_TO_BACKUP into tape, creating on the fly a MD5SUM file of the backup. Then rewinds one record on tape and checks if it's well written.
This is sample output - yours may be different.
0

tar -cvf - $DIR_TO_BACKUP | tee >(md5sum > backup_md5.txt) > /dev/st0 && mt -f /dev/nst0 bsfm 1 && md5sum -c backup_md5.txt < /dev/st0

bugmenot · 2011-01-27 20:57:36 1
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Selecting a random file/folder of a folder

Also looks in subfolders

Kill all processes that don't belong to root/force logoff

explanation: grep -- displays process ids -v -- negates the matching, displays all but what is specified in the other options -u -- specifies the user to display, or in this case negate The process loops through all PIDs that are found by pgrep, then orders a forced kill to the processes in numerical order, effectively killing the parent processes first including the shells in use which will force the users to logout. Tested on Slackware Linux 12.2 and Slackware-current

Add fade in/out to first & last 25 frames of a video

Replace vid.mp4 with the path to your original video file, and out.mp4 to the path where you want to save the new file. To view the output first before saving, remove "-consumer avformat:out.mp4" from the end. Documentation for mlt framework and melt command can be found here: http://www.mltframework.org/bin/view/MLT/Documentation

Install pip with Proxy

Installs pip packages defining a proxy

Silently deletes lines containing a specific string in a bunch of files

This command will find all occurrences of one or more patterns in a collection of files and will delete every line matching the patterns in every file

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"

Numeric zero padding file rename

rename file name with fixed length nomeric format pattern

Inserts the results of an autocompletion in the command line

Pressing ESC then * will insert in the command line the results of the autocompletion. It's hard to explain but if you look the sample output or do $ echo ESC * you will understand quickly. By the way, few reminders about ESC : - Hold ESC does the same thing as tab tab - 'ESC .' inserts the last argument of last command (can be done many times in order to get the last argument of all previous commands)

Makes the permissions of file2 the same as file1

Also works with: $chgrp --reference file1 file2 $chown --reference file1 file2

make, or run a script, everytime a file in a directory is modified

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