Okay, I am trying to make a bash script to get a certain domains IP address (my home ip). My home is on a DHCP lease from my ISP, so I cannot always trust the IP address to remain constant.
The IP was altered above, as well as the domain in the first statement.
I am on Snow Leopard 10.6.4, though it is built off of a Unix core.
For background on what I am trying to do ultumatly...
I am a Drupal developer, and I would like my .bashrc file to set my host entry appropriately to use a specific domain (not one set via my router) to point to my home computer. I will ultimatly be adding that, but meanwhile, now I'm only getting the ip address in a usable form.
I'm trying to find a command that will trim the white space off a string.
e.g.
$str = " stuf "
$str = trim ( $str )
echo $str // ouput would just be stuf
Thanks, Mark (4 Replies)
All,
I'm a newbie at shell scripting and regular expressions and I just need to take a file that's arranged like the one below, remove all leading and trailing whitespace and add a line break after each word. I've been able to remove a few spaces using various awk, sed and Perl scripts, but... (7 Replies)
Hi Friends,
Can any one help with this issue:
How to trim spaces for each line at the end,
Like I have a file in this format.
EMP1 SMITH 46373 5 STREET HOWARD 74636
EMP2 JONES 5454 { these are spaces ........}
EMP3 SMITH 46373 5 STREET HOWARD 74636
EMP4 JON 2554 { these are... (1 Reply)
Hello,
I am passing a filename to a script to draw parameters from it. However, I want to use part of the filename as a parameter. The filename is transfer_ccf_3731_10.sh but I only need the 3731_10 part of it.
Is this possible? Any help or suggestions would be appreciated!
Regards,
J. (4 Replies)
Hi All,
I am using trim in my code..
ID_SA_SOURCE="`echo "$data" | cut -c17-34 | tr -s " "`"
ID_SA_DEST="`echo "$data" | cut -c35-52 | tr -s " "`"
echo"$ID_SA_SOURCE";"$ID_SA_DEST";
the output is
0608166896; 3001339; contains one whitespace between the two ..how can i remove that single... (3 Replies)
Hi all,
I've been looking for how to eliminate blank spaces in a variable or strings. I've seen several ways, using sed, awk and even python. One of them is use 'tr' command, but it does not work as I expected: For example:
echo " stuff " | tr -s " "leaves one space ahead and another... (3 Replies)
To trim 3rd field in for all the lines of a file and replace the modified string in that particular field.
For example i have a file called Temp.txt having content
Temp.txt
-----------------
100,234,M1234
400,234,K1734
300,345,T3456
----------------
So the modified file output should... (4 Replies)
FOLKS ,
i have a text file that is generated automatically of an another korn shell script, i want to bring in the fifth line of the text file in to my korn shell script and look for a particular word in the line . Can you all share some thoughts on this one.
thanks...
Venu (3 Replies)
Hi All,
I have a file named as
FAB1_600015_CONRAD.A0_7XYZ12345.000_LT-SWET.01_LTPA25L_20110622-161429_07_WFR12345_20110622-161429_20110712-125228.data.dis
I want to generate a directory taking only the 7XYZ12345.000_WFR12345
The length and format of the Filename will be the same... (2 Replies)
Discussion started by: asheshrocky
2 Replies
LEARN ABOUT DEBIAN
dhcpcd-run-hooks
DHCPCD-RUN-HOOKS(8) BSD System Manager's Manual DHCPCD-RUN-HOOKS(8)NAME
dhcpcd-run-hooks -- DHCP client configuration script
DESCRIPTION
dhcpcd-run-hooks is used by dhcpcd(8) to run any system and user defined hook scripts. System hook scripts are found in
/lib/dhcpcd/dhcpcd-hooks and the user defined hooks are /etc/dhcpcd.enter-hook. and /etc/dhcpcd.exit-hook. The default install supplies
hook scripts for configuring /etc/resolv.conf and the hostname. Your distribution may have included other hook scripts to say configure ntp
or ypbind. A test hook is also supplied that simply echos the dhcp variables to the console from DISCOVER message.
Each time dhcpcd-run-hooks is invoked, $interface is set to the interface that dhcpcd is run on and $reason is to the reason why
dhcpcd-run-hooks was invoked. DHCP information to be configured is held in variables starting with the word new_ and old DHCP information to
be removed is held in variables starting with the word old_. dhcpcd can display the full list of variables it knows how about by using the
-V, --variables argument.
Here's a list of reasons why dhcpcd-run-hooks could be invoked:
PREINIT dhcpcd is starting up and any pre-initialisation should be done.
CARRIER dhcpcd has detected the carrier is up. This is generally just a notification and no action need be taken.
INFORM dhcpcd informed a DHCP server about it's address and obtained other configuration details.
BOUND dhcpcd obtained a new lease from a DHCP server.
RENEW dhcpcd renewed it's lease.
REBIND dhcpcd has rebound to a new DHCP server.
REBOOT dhcpcd successfully requested a lease from a DHCP server.
IPV4LL dhcpcd failed to contact any DHCP servers but did obtain an IPV4LL address.
STATIC dhcpcd has been configured with a static configuration which has not been obtained from a DHCP server.
3RDPARTY dhcpcd is monitoring the interface for a 3rd party to give it an IP address.
TIMEOUT dhcpcd failed to contact any DHCP servers but was able to use an old lease.
EXPIRE dhcpcd's lease or state expired and it failed to obtain a new one.
RELEASE dhcpcd's lease was released back to the DHCP server for re-use.
NAK dhcpcd received a NAK from the DHCP server. This should be treated as EXPIRE.
NOCARRIER dhcpcd lost the carrier. The cable may have been unplugged or association to the wireless point lost.
FAIL dhcpcd failed to operate on the interface. This normally happens when dhcpcd does not support the raw interface, which means
it cannot work as a DHCP or ZeroConf client. Static configuration and DHCP INFORM is still allowed.
STOP dhcpcd stopped running on the interface.
DUMP dhcpcd has been asked to dump the last lease for the interface.
TEST dhcpcd received an OFFER from a DHCP server but will not configure the interface. This is primarily used to test the variables
are filled correctly for the script to process them.
ROUTERADVERT dhcpcd has received an IPv6 Router Advertisment, or one has expired.
FILES
When dhcpcd-run-hooks runs, it loads /etc/dhcpcd.enter-hook and any scripts found in /lib/dhcpcd/dhcpcd-hooks in a lexical order and then
finally /etc/dhcpcd.exit-hook
SEE ALSO dhcpcd(8)AUTHORS
Roy Marples <roy@marples.name>
BUGS
Please report them to
http://roy.marples.name/projects/dhcpcd
SECURITY CONSIDERATIONS
Little validation of DHCP options is done in dhcpcd itself. Instead, it is up to the hooks to handle any validation needed. To this end,
some helper functions are provided, such as valid_domainname as used by the 20-resolv.conf hook to ensure that the hostname is not set to an
invalid value. valid_path is also provided, but is currently unused by a stock hook script.
BSD March 19, 2012 BSD