Understanding sed Post: 302774017

9 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

need further understanding of init.d

I needt o know how what init.d does and how it knows which dameons/applications to turn off and how to restart the applications after reboot. any OS - solaris/hp-ux

2. Shell Programming and Scripting

understanding the sed command

Guys, I am trying to understand the sed command here. adx001 $ a=/clocal/dctrdata/user/dctrdat1/trdroot/recouncil adx001 $ b=`echo $a | sed 's/\//\\\\\//g'` adx001 $ echo $b \/clocal\/dctrdata\/user\/dctrdat1\/trdroot\/recouncil The sed command i took it from the script. Please...

3. UNIX for Dummies Questions & Answers

Help understanding sed

I am trying to create a basic script that converts an Oracle script into a Sybase script. The only things im changing are Datatypes and the to_char and to_date functions. I am not really 100% sure of the way it works. I have tried running the functions through a loop to replace each word line...

4. Shell Programming and Scripting

need help understanding mv

I just started shell coding and I'm a bit confused on how 'mv' works can someone explain to me how it works and if i did this correctly. Thanks. echo "Enter Name of the first file:" read file1 #echo $file1 if ; then echo "Sorry, file does not exist." exit 1 ...

5. UNIX for Dummies Questions & Answers

understanding {%/*}/

Hi Gurus: I am trying to understand the following line of code.I did enough of googling to understand but no luck.Please help me understand the follow chunk of code: X=$0 MOD=${X%/*}/env.ksh X is the current script from which I am trying to execute. Say if X=test.ksh $MOD is echoing :...

6. UNIX for Dummies Questions & Answers

understanding sed command

Hi Friends, I need a small help in understanding the below sed command. $ cat t4.txt 1 root 1 58 0 888K 368K sleep 4:06 0.00% init 1 root 1 58 0 888K 368K sleep 4:06 0.00% init last $ sed 's/*$//' t4.txt 1 root 1 58 0 888K ...

7. Shell Programming and Scripting

help understanding regex with grep & sed

I have the following line of code that works wonders. I just don't completely understand it as I am just starting to learn regex. Can you help me understand exactly what is happening here? find . -type f | grep -v '^\.$' | sed 's!\.\/!!'

8. Shell Programming and Scripting

Need your help in understanding this

Hi, I found this in a script and I would like to know how this works Code is here: # var1=PART1_PART2 # var2=${var1##*_} # echo $var2 PART2 I'm wondering how ##* makes the Shell to understand to pick up the last value from the given.

9. Shell Programming and Scripting

Need Quick help on Understanding sed Regex

Hi Guys, Could you please kindly explain what exactly the below SED command will do ? I am quite confused and i assumed that, sed 's/*$/ /' 1. It will remove tab and extra spaces .. with single space. The issue is if it is removing tab then it should be � right .. please assist....

LEARN ABOUT DEBIAN

edvips

EDVIPS(1)						      General Commands Manual							 EDVIPS(1)

NAME

       edvips - edit header of a vips image file

SYNOPSIS

       edvips [OPTION...] vipsfile

DESCRIPTION

       edvips alters a VIPS image file's header. This is useful for setting the resolution, for example.

       The options are:

	 -x, --xsize=N	     set Xsize to N
	 -y, --ysize=N	     set Ysize to N
	 -b, --bands=N	     set Bands to N
	 -f, --format=F      set BandFmt to F (eg. uchar)
	 -i, --interpretation=I
			     set Interpretation to I (eg. xyz)
	 -c, --coding=C      set Coding to C (eg. labq)
	 -X, --xres=R	     set Xres to R pixels/mm
	 -Y, --yres=R	     set Yres to R pixels/mm
	 -u, --xoffset=N     set Xoffset to N
	 -v, --yoffset=N     set Yoffset to N
	 -e, --setext	     replace extension block with stdin

       Be very careful when changing Xsize, Ysize, BandFmt or Bands. edvips does no checking!

EXAMPLES

       To set the Xsize to 512 and Bands to 6:

	 edvips --xsize=512 --bands=6 fred.v

       or

	 edvips -x 512 -b 6 fred.v

       Extract the XML metadata from an image with header(1), edit it, and reattach with edvips(1).

	 header -f getext fred.v | sed s/banana/pineapple/ | edvips -e fred.v

RETURN VALUE

       returns 0 on success and non-zero on error.

SEE ALSO

       header(1)

COPYRIGHT

       K. Martinez 1993

								   30 June 1993 							 EDVIPS(1)