Commands by drerik

Commands by drerik (3)

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remove password from openssl key file

Strip a password from a openssl key to use with apache httpd server
This is sample output - yours may be different.
2

openssl rsa -in /path/to/originalkeywithpass.key -out /path/to/newkeywithnopass.key

drerik · 2012-09-16 19:31:38 0
Updates your no-ip.org account with curl
This is sample output - yours may be different.
5

curl -u $USERNAME:$PASSWORD "http://dynupdate.no-ip.com/nic/update?hostname=$HOSTNAME"

drerik · 2012-08-16 05:45:03 2
Gets directory size on sub directories in current dir with human readable size
This is sample output - yours may be different.
0

du -h --max-depth=1

drerik · 2012-08-07 13:05:43 0

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Create a mirror of a local folder, on a remote server

Create a exact mirror of the local folder "/root/files", on remote server 'remote_server' using SSH command (listening on port 22) (all files & folders on destination server/folder will be deleted)

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"

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"

Unite pdf files

pdfunite is a part of the poppler-utils. poppler-utils package is only 150KB. The alternative - pdftk package is 14MB! Install poppler-utils if you need simple pdf operation commands like unite, separate, info, text/html conversions

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 open ports

Tested in Linux and OSX

Show every subdirectory (zsh)

Printable random characters

Reads psuedorandom bytes from /dev/urandom, filtering out non-printable ones. Other character classes can be used, such as [:alpha:], [:digit:] and [:alnum:]. To get a string of 10 lowercase letters: $ tr -dc '[:lower:]' < /dev/urandom | head -c 10

Delete all aliases for a network interface on a (Free)BSD system

The example command deletes all aliases for network interface 'em0' assuming that the aliases have netmask of 255.255.255.255 and the master IP has some other netmask (such as 255.255.255.0). See here -> http://my.galagzee.com/2009/07/22/deleting-all-network-interface-aliases/ for more on the rationale of this command.

backs up at the date today

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