extracting first few chars from file 3

[YYYYUU]

I was using "head -1" to extract the first line from a file and put this in variable ${FIRSTLINE}.

How do I get the first 10 characters from ${FIRSTLINE}?

Many thanks.

 

[J1mbo]

No need to use head. awk will get the first line and the first 10 characters into a variable:

VARIABLE=`awk 'NR == 1{print substr($0,1,10)}' your_file`


-jim

 

[predamarcel]

hi,
in bash you can use:
FIRST_TEN=${FIRSTLINE:0:10}

in others shells:
FIRST_TEN=`head -1 /tmp/your_file | cut -c1-10` __

http://marcell.hypermart.net/

___

 

[SamBones]

In Korn Shell you can use...
[tt]
typeset -L10 FIRST_TEN

FIRST_TEN=$(head -1 /dir/filename)
[/tt]
The [tt]typeset[/tt] command changes the way the variable works. The "L" left justifies whatever you assign to it. The "10" forces the length to 10, no matter what you assign to it.

Hope this helps.

 

[6656]

How to extract last word from a string?
e.g.: in the string "/home/myid"
expected result: lastword=myid

Thanks

Mike

 

[vgersh99]

#!/bin/ksh

a='/home/dir/myid'

last="${a##*/}"

echo "a->[${a}] last->[${last}]"
vlad
+----------------------------+
| #include<disclaimer.h> |
+----------------------------+

 

[6656]

Thanks vlad,
It works fine. How about to extract the first or second.... word from a string &quot;abc defg mn xyz&quot;? Thanks again.

Mike

 

[vgersh99]

#!/bin/ksh
str=&quot;abc defg mn xyz&quot;

first=$(echo ${str} | nawk '{print $1}')
second=$(echo ${str} | nawk '{print $2}') vlad
+----------------------------+
| #include<disclaimer.h> |
+----------------------------+

 

[6656]

Supper! Thanks vlad again.