Commands by scubacuda

Commands by scubacuda (7)

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Unrar all files in a directory

Great for sites like Gigapedia.org that give away great free rar'd books. More similar commands here: http://www.howtogeek.com/howto/ubuntu/unzip-or-unrar-many-files-at-once-in-linux/ Show Sample Output
This is sample output - yours may be different.
```
$for f in *.rar; do unrar e "$f"; done

UNRAR 3.80 beta 2 freeware      Copyright (c) 1993-2008 Alexander Roshal

Extracting from file.rar

Extracting  file.pdf                                             OK 
All OK

$
```
0

for f in *.rar;do unrar e ?$f?;done

scubacuda · 2009-07-26 16:56:49 11
quickly change all .html extensions on files in folder to .htm
This is sample output - yours may be different.
13

for i in *.html ; do mv $i ${i%.html}.htm ; done

scubacuda · 2009-03-03 16:10:18 21
checking space availabe on all /proc/mounts points (using Nagios check_disk)

More info here: http://nagioswiki.com/wiki/index.php/Checking_/proc/mounts_on_remote_server Show Sample Output
This is sample output - yours may be different.
```
root@nagios plugins]# pwd

/usr/lib/nagios/plugins

[root@nagios plugins]# ./check_nrpe -H monitored-server -c check_disks_proc_mounts

DISK OK - free space: / 5811 MB (59%); /boot 35 MB (57%); /opt 3401 MB (34%); /dev/shm 1948 MB (100%); /tmp 6731 MB (94%); /var 4222 MB (84%);| /=4033MB;8367;8859;0;9844 /boot=26MB;51;54;0;60 /opt=6676MB;8564;9068;0;10076 /dev/shm=0MB;1655;1753;0;1948 /tmp=395MB;6057;6413;0;7126 /var=820MB;4284;4536;0;5041
```
4

check_disk -w 15% -c 10% $(for x in $(cat /proc/mounts |awk '{print $2}')\; do echo -n " -p $x "\; done)

scubacuda · 2009-02-19 22:54:06 7
show open ports on computer

From 'man netstat' "netstat -i | -I interface [-abdnt] [-f address_family] [-M core] [-N system] Show the state of all network interfaces or a single interface which have been auto-configured (interfaces statically configured into a system, but not located at boot time are not shown). An asterisk (``*'') after an interface name indicates that the interface is ``down''. If -a is also present, multicast addresses currently in use are shown for each Ethernet interface and for each IP interface address. Multicast addresses are shown on separate lines following the interface address with which they are associated. If -b is also present, show the number of bytes in and out. If -d is also present, show the number of dropped packets. If -t is also present, show the contents of watchdog timers."
This is sample output - yours may be different.
-1

netstat -an | grep -i listen

scubacuda · 2009-02-19 19:27:49 11
nmap IP block and autogenerate comprehensive Nagios service checks

More info here: http://nagioswiki.com/wiki/index.php/Autocreating_Nagios_Configuration_with_Nmap_and_Nmap2Nagios.pl
This is sample output - yours may be different.
6

nmap -sS -O -oX /tmp/nmap.xml 10.1.1.0/24 -v -v && perl nmap2nagios.pl -v -r /tmp/10net.xml -o /etc/nagios/10net.cfg

scubacuda · 2009-02-19 18:42:37 10
xxcopy everything from one Windows box to another

friends don't let friends use Robocopy!
This is sample output - yours may be different.
-4

xxcopy x:\folder1 y:\folder2 /s /h /tca /tcc /tcw /yy

scubacuda · 2009-02-19 18:39:06 11
send files via ssh-xfer

from http://matt.ucc.asn.au/ssh-xfer/ "ssh-xfer is a hackish but handy way of transferring files from remote hosts to your local computer. Firstly, you need to run a slightly modified SSH authentication agent program on your local computer. Patches are available for both OpenSSH and PuTTY, see below. If you haven't used a SSH agent program before, this article seems to be reasonable, or you can look at the OpenSSH/PuTTY docs. You don't need any modifications to your ssh client or server programs - only the modified SSH authentication agent, and the extra ssh-xfer program."
This is sample output - yours may be different.
0

cat somefilehere.txt | ssh-xfer nametocallfile.txt -

scubacuda · 2009-02-19 18:35:33 6

What's this?

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Unaccent an entire directory tree with files.

This command changes all filename and directories within a directory tree to unaccented ones. I had to do this to 'sanitize' some samba-exported trees. The reason it works might seem a little difficult to see at first - it first reverses-sort by pathname length, then it renames only the basename of the path. This way it'll always go in the right order to rename everything. Some notes: 1. You'll have to have the 'unaccent' command. On Ubuntu, just aptitude install unaccent. 2. In this case, the encoding of the tree was UTF-8 - but you might be using another one, just adjust the command to your encoding. 3. The program might spit a few harmless errors saying the files are the same - not to fear.

mtr, better than traceroute and ping combined

mtr combines the functionality of the traceroute and ping programs in a single network diagnostic tool. As mtr starts, it investigates the network connection between the host mtr runs on and HOSTNAME. by sending packets with purposly low TTLs. It continues to send packets with low TTL, noting the response time of the intervening routers. This allows mtr to print the response percentage and response times of the internet route to HOSTNAME. A sudden increase in packetloss or response time is often an indication of a bad (or simply over‐loaded) link.

tar.gz with gpg-encryption on the fly

Create a encrypted tar.gz file from a directory on the fly. The encryption is done by GPG with a public key. The resulting filename is tagged with the date of creation. Very usefull for encrypted snapshots of folders.

Print number of mb of free ram

Create .pdf from .doc

sudo apt-get install cups-pdf

Perform a C-style loop in Bash.

Print 0 through 99, each on a separate line.

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"

a function to find the fastest DNS server

http://public-dns.info gives a list of online dns servers. you need to change the country in url (br in this url) with your country code. this command need some time to ping all IP in list.

Convert records in columns to csv

Print a row of 50 hyphens

This feels more intuitive to me.

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