Commands by gwchamb

Commands by gwchamb (5)

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Push a directory onto the stack

Use also with: Move to respective parameters == () { = +2; } === () { = +3; } ==== () { = +4; } Pop the last entry off the directory stack - () { popd ${1:+"$1"}; } Show Sample Output
This is sample output - yours may be different.
```
$ = /usr/local/bin
$ dirs
$ /usr/local/bin ~
```
1

= () { pushd ${1:+"$1"}; }

gwchamb · 2012-07-27 18:46:41 26
Select MacOSX Network Location

Use this command to change your network location from the OSX command line.
This is sample output - yours may be different.
-1

scselect <location>

gwchamb · 2011-01-26 03:56:14 4
Search through files, ignoring .svn

Unless you have files that include 'svn' in them, this should provide enough information to be useful. If you need to be certain, add the leading dot in the search pattern
This is sample output - yours may be different.
-1

find . | grep -v svn

gwchamb · 2011-01-16 03:51:57 5
Perl one-liner to determine number of days since the Unix epoch

There are some environments that use this value for password and account expiration. It's helpful to be able to quickly determine the number of days since the Unix epoch (dse) when working directly with the configuration files as an administrator. Show Sample Output
This is sample output - yours may be different.
```
14988
```
1

perl -e 'printf qq{%d\n}, time/86400;'

gwchamb · 2011-01-14 21:56:19 25
Quick searching with less

This command enables the user to append a search pattern on the command line when using less as the PAGER. This is especially convenient (as the example shows) in compressed files and when searching man pages (substituting the zcat command with man, however).
This is sample output - yours may be different.
2

zcat file.gz | less +/search_pattern

gwchamb · 2011-01-14 21:29:40 5

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run remote linux desktop

First of all you need to run this command. X :12.0 vt12 2>&1 >/dev/null & This command will open a X session on 12th console. And it will show you blank screen. Now press Alt + Ctrl + F7. You will get your original screen. Now run given command "xterm -display :12.0 -e ssh -X user@remotesystem &". After this press Alt + Ctrl + F12. You will get a screen which will ask you for password for remote linux system. And after it you are done. You can open any window based application of remote system on your desktop. Press Alt + Ctrl + F7 for getting original screen.

Find usb device in realtime

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

String to binary

Cool but useless.

Quickly ping range of IP adresses and return only those that are online

Tested in Debian, ymmv. - c 1 : send only one ping;; -W 1: wait for one second and then exit ping, assuming target IP is not available; change as needed (-W 0.5 for half a second, smaller or greater value depending on network speed/latency)

Numbers guessing game

Felt like I need to win the lottery, and wrote this command so I train and develop my guessing abilities.

Download all manuals RedHat 7 (CentOS/Fedora) with one command in Linux

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"

Find all active ip's in a subnet

nmap for windows and other platforms is available on developer's site: http://nmap.org/download.html nmap is robust tool with many options and has various output modes - is the best (imho) tool out there.. from nmap 5.21 man page: -oN/-oX/-oS/-oG : Output scan in normal, XML, s|

simple backup with rsync

With this cron, rsync begins to sinchronize the contents of the local directory on /[VIPdirectory] with the directory /backup/[VIPdirectory] on the remote server X.X.X.X. Previously we need working on public/private-keys ssh to guarantee the acces to the remote server on X.X.X.X

ps -ef | grep PROCESS | grep -v grep | awk '{print $2}' | xargs kill -9

kills all pids matching the search term of "PROCESS". Be careful what you wish for :)

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