Shell script help required


Login or Register for Dates, Times and to Reply

 
Thread Tools Search this Thread
# 1  
Shell script help required

Hi,

Can someone help me with this small piece of code.

DIRNAME=$(dirname $0)
BASENAME=$(basename $0)
DATA="${DIRNAME}/${BASENAME}.data"
[ -r $DATA ] && . $DATA

whats is meant by [ -r $DATA ] && . $DATA here...

Regards,
Abhishek

Last edited by max29583; 07-16-2008 at 08:20 AM.. Reason: Missed my name at the end....
# 2  
If $DATA exists and is readable, source (read) the file $DATA and include its contents in the current shell script
# 3  
Ok.....
so this is a condition but without an "if ... fi" block?
Smilie

Thanks for the help friend.

Regards,
Abhi
Login or Register for Dates, Times and to Reply

Previous Thread | Next Thread
Thread Tools Search this Thread
Search this Thread:
Advanced Search

Test Your Knowledge in Computers #266
Difficulty: Easy
In 1952, Alan Turing was prosecuted for homosexual acts a criminal offense in the UK and accepted chemical castration treatment as an alternative to prison.
True or False?

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Shell script required

Hi, I need shell script for getting the date in format from below text output IP IS 10.238.52.65 pun-ras-bng-mhs-01#show conf port 2/4 Building configuration... Current configuration: ! card ge3-4-port 2 ! port ethernet 2/4 no shutdown encapsulation dot1q (7 Replies)
Discussion started by: surender reddy
7 Replies

2. Shell Programming and Scripting

help required with shell script

Hi, My input file as follws $ cat 1.txt ------- a aa aaa 11 b bb bbb 22 I am able to extract first and last column of a given line as follows. $ nawk '{print $1}' FS= RS= 1.txt | awk '{ $NF = ""; print }' a $ nawk '{print $1}' FS= RS= 1.txt | awk '{ print $NF}' 11 however, the... (4 Replies)
Discussion started by: bala123
4 Replies

3. Shell Programming and Scripting

Advice required shell script

Hi all, this is my first post, so please be gentle... I have a situation wherby I need a script that traverses known paths. Check for the modified date (n days) and then deletes all subdirs. I have come up with this hotch potch, but as far as I can tell it seems to work. What I am wondering... (4 Replies)
Discussion started by: primus7
4 Replies

4. Shell Programming and Scripting

Shell script is required

Dear All I have a filelisting as below: abcd_20110715_0007 abcd_20110715_0010 abcd_20110716_0001 abcd_20110716_0004 abcd_20110715_0008 abcd_20110715_0011 abcd_20110716_0002 abcd_20110716_0005 abcd_20110715_0009 abcd_20110715_0012 abcd_20110716_0003 abcd_20110716_0006 ... (3 Replies)
Discussion started by: at1700
3 Replies

5. Shell Programming and Scripting

shell script required...

There are two fields actually one is server name and the other one is Time. Based on time, there are 8 columns and these will be updated with the flag 1 if at all if there is any server name. Time Server name 15 to 18 18 to 21 21 to 24 00 to 03 03 to 06 06 to 09 09 to 12 Server... (3 Replies)
Discussion started by: venkatesht
3 Replies

6. Shell Programming and Scripting

Small shell script help required

Hi Guys, Please can some one explain me the below part of code. In this code what is the use of the line in Bold. COPY=0 if ; then echo "$CONF exists and is non-empty - backing it up" SUFFIX=`date +%Y%m%d%H%M%S` echo "cp -p $CONF $CONF.$SUFFIX" cp -p $CONF... (4 Replies)
Discussion started by: max29583
4 Replies

7. Shell Programming and Scripting

Shell Script Required

I have following information in one file. ObjID: 004ee4e4-0d92-71dd-1512-9887a1f10000 Address: 152.135.0.61 PingState: Ping Responding ----------------Management Address--------------------- ++++++++++++++++Interface+++++++++++++++++++++ IFName: dall00r1.mis.amat.com ] ObjID:... (3 Replies)
Discussion started by: ntgobinath
3 Replies

8. Shell Programming and Scripting

Shell Script Required!

Hi people, I am new to this forum. I have taken unix this semester in my college and i am new to it. I am finding shell scripting a bit hard and i need a little help. I require a shell script to delete files that end as .bak , .BAK, #, ~ and files with the name core.The Script should accept... (3 Replies)
Discussion started by: vats
3 Replies

9. Linux

shell script required

Hi, iam presenting the input text file format.Of this i need the character count of the number of characters present in each file.The attached file is a combination of 3 text file.each text file starts at record 1 - 34, then the next tetx file starts. What i need is the character count of each... (1 Reply)
Discussion started by: sethunath
1 Replies

10. Shell Programming and Scripting

shell script required

hi , i need a shell script that will remove the first and second lines of the text file and will list the word count of the characters present in it. the text file will be consisting of multiple textfiles.the first text file starts from 01-34.like wise the next file also starts from 01-34... (4 Replies)
Discussion started by: sethunath
4 Replies

Featured Tech Videos