Commands by patko

Commands by patko (7)

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Execute sudo command remotely with ssh

This command will ask for remote sudo password before executing a remote command.
This is sample output - yours may be different.
-4

ssh -t myserver.org 'sudo ls /etc'

patko · 2013-04-09 04:23:37 11

List all open ports and their owning executables

Particularly useful on OS X where netstat doesn't have -p option. Show Sample Output

lsof -i -P | grep -i "listen"

patko · 2010-10-14 09:37:51 11

Delete all but latest file in a directory

Useful for deleting old unused log files.
This is sample output - yours may be different.
6

ls -pt1 | sed '/.*\//d' | sed 1d | xargs rm

patko · 2009-07-29 13:59:58 7
Tail the most recently modified file
This is sample output - yours may be different.
0

ls -t1 | head -n1 | xargs tail -f

patko · 2009-07-29 13:46:29 5
Exclude svn directories with grep

exclude-dir option requires grep 2.5.3
This is sample output - yours may be different.
8

grep -r --exclude-dir=.svn PATTERN PATH

patko · 2009-03-04 23:21:50 7
SSH connection through host in the middle

Unreachable_host is unavailable from local network, but it's available from reachable_host's network. This command creates a connection to unreachable_host through "hidden" connection to reachable_host.
This is sample output - yours may be different.
167

ssh -t reachable_host ssh unreachable_host

patko · 2009-03-03 23:21:36 719
Allows incoming traffic from specific IP address to port 80
This is sample output - yours may be different.
0

sudo ufw allow proto tcp from 1.2.3.4 to any port 80

patko · 2009-02-26 12:15:10 9

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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.

check open ports without netstat or lsof

Show word-by-word differences between two latex files, in color

list files recursively by size

Remove all zero size files from current directory (not recursive)

works only in zsh

Better recursive grep with pretty colors... requires ruby and gems (run: "gem install rak")

Find usb device in realtime

Using this command you can track a moment when usb device was attached.

finding more large files

Remove security limitations from PDF documents using QPDF

Remove security restrictions from PDF documents using this very simple command on Linux and OSX. You need QPDF installed (http://qpdf.sourceforge.net/) for this to work.

Copy ssh keys to user@host to enable password-less ssh logins.

To generate the keys use the command ssh-keygen

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