Sponsored Content
Full Discussion: If statement
Top Forums Shell Programming and Scripting If statement Post 302076924 by dreams5617 on Friday 16th of June 2006 04:39:02 PM
Old 06-16-2006
Error

No the shell script i have is written like this:

if [[ ! -a $LOG ]]
then
print "$0 started at .... $date" > $LOG
............
fi

after some lines of the above script i saw another similar if condition like:

if [[ -a $OUTFILE ]]
then
rm $OUTFILE
fi

This script with the above statements in it is working perfectly ...........
pl have a look at it & let me know what -a option mean, if it is boolean 'and' is that meaning fits into the above script.

thanks
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

if statement

can someone please tell me what is wrong with the below. i'm trying to get a script to run if the content of a variable is either small letter y or capital letter Y. if then whatever fi (4 Replies)
Discussion started by: Terrible
4 Replies

2. Shell Programming and Scripting

statement

I want to write a program that would convert yard to feet and feet to yard. i.e 1 yard = 3 * feet Echo "enter a" read a expr a *3 The trick is that I want to give the user some options. After the conversion from yard to feet is done, I want to ask the user whether or not he/she wants to... (10 Replies)
Discussion started by: Ernst
10 Replies

3. Shell Programming and Scripting

If statement - How to write a null statement

In my ksh script, if the conditions of a if statement are true, then do nothing; otherwise, execute some commands. How do I write the "do nothing" statement in the following example? Example: if (( "$x"="1" && "$y"="a" && "$z"="happy" )) then do nothing else command command fi... (3 Replies)
Discussion started by: april
3 Replies

4. Shell Programming and Scripting

How is use sselect statement o/p in insert statement.

Hi All, I am using Unix ksh script. I need to insert values to a table using the o/p from a slelect statement. Can anybody Help! My script looks like tihs. ---`sqlplus -s username/password@SID << EOF set heading off set feedback off set pages 0 insert into ${TB_NAME}_D... (2 Replies)
Discussion started by: nkosaraju
2 Replies

5. UNIX for Dummies Questions & Answers

If statement (yes or no)

I have the program: #!/bin/ksh echo Please enter yes or no read n typeset -l n if ] then echo My name exit else echo delete my name fi Question: How can I make the program accept only the word "yes" or "no" otherwise it will ask the user to re-enter? Thanks! (7 Replies)
Discussion started by: bobo
7 Replies

6. Shell Programming and Scripting

If statement help

I'm trying to create a script that would allow me to identify the sucessful removal of a file. Here's what i put together so far, let me know if it's correct or not. FILE_NAME="cactus.dat" FILE_FIND='find / -name $FILE_NAME' if ;then echo "cactus.dat was not removed successfully" ... (3 Replies)
Discussion started by: sdpinoy
3 Replies

7. Shell Programming and Scripting

Statement

${GREP} ASM /var/opt/oracle/oratab | \ ${CUT} -d':' -f1 Please tell me the meaning for the above statement. (2 Replies)
Discussion started by: lg123
2 Replies

8. Shell Programming and Scripting

Statement

${PFILE}.backupfile Please tell me what the above statement means? (1 Reply)
Discussion started by: lg123
1 Replies

9. Shell Programming and Scripting

If statement

Hi, I have this code here. Its suppose to do something when certain condition is met, I'm pretty sure at least one of the condition will be meet somewhere in the loop but it always go to else part of the script. Is something wrong on this script? age_list=`tar -tvf /home/dir/$tarfile... (4 Replies)
Discussion started by: erin00
4 Replies

10. Shell Programming and Scripting

Convert Update statement into Insert statement in UNIX using awk, sed....

Hi folks, I have a scenario to convert the update statements into insert statements using shell script (awk, sed...) or in database using regex. I have a bunch of update statements with all columns in a file which I need to convert into insert statements. UPDATE TABLE_A SET COL1=1 WHERE... (0 Replies)
Discussion started by: dev123
0 Replies
SCRIPT(1)						    BSD General Commands Manual 						 SCRIPT(1)

NAME
script -- make typescript of terminal session SYNOPSIS
script [-adfpqr] [-c command] [file] DESCRIPTION
script makes a typescript of everything printed on your terminal. It is useful for students who need a hardcopy record of an interactive session as proof of an assignment, as the typescript file can be printed out later with lpr(1). If the argument file is given, script saves all dialogue in file. If no file name is given, the typescript is saved in the file typescript. Option: -a Append the output to file or typescript, retaining the prior contents. -c command Run the named command instead of the shell. Useful for capturing the output of a program that behaves differently when associated with a tty. -d When playing back a session with the -p flag, don't sleep between records when playing back a timestamped session. -f Flush output after each write. This is useful for watching the script output in real time. -p Play back a session recorded with the -r flag in real time. -q Be quiet, and don't output started and ended lines. -r Record a session with input, output, and timestamping. The script ends when the forked shell exits (a control-D to exit the Bourne shell (sh(1)), and exit, logout or control-d (if ignoreeof is not set) for the C-shell, csh(1)). Certain interactive commands, such as vi(1), create garbage in the typescript file. script works best with commands that do not manipulate the screen, the results are meant to emulate a hardcopy terminal. ENVIRONMENT
The following environment variable is used by script: SHELL If the variable SHELL exists, the shell forked by script will be that shell. If SHELL is not set, the Bourne shell is assumed. (Most shells set this variable automatically). SEE ALSO
csh(1) (for the history mechanism). HISTORY
The script command appeared in 3.0BSD. BUGS
script places everything in the log file, including linefeeds and backspaces. This is not what the naive user expects. BSD
October 17, 2009 BSD
All times are GMT -4. The time now is 08:54 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy