10-10-2007
Quote:
Originally Posted by
NycUnxer
if [[ -a ${LOGFILE} ]]; then
if [[ -a ${LOGFILE}.old ]]; then
rm -f ${LOGFILE}.old
fi
mv ${LOGFILE} ${LOGFILE}.old
fi
Havent done nested ifs in a while. I'm reading someones code If I'm reading this correctly. It checks for the logfile, and if it exists it checks for the old logfile and if that exists, it removes the old log file. Else it moves the logfile to the logfile.old. Someone correct me if I'm wrong, thanks.
not exactly - it will 'move the logfile to the logfile.old' regardLESS whether the 'old logfile' exists or not - there is no 'ELSE' in the inner 'if'.
Last edited by vgersh99; 10-10-2007 at 05:39 PM..
9 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi,
I'm having some trouble with the syntax in constructing a simple nested 'for' loop.
My code is as follows:
#!/bin/bash
dir1="fred flume haystack"
for dir2 in ${dir1}
do
fred="1 2 3"
flume="a b c"
... (7 Replies)
Discussion started by: Sn33R
7 Replies
2. Shell Programming and Scripting
Please don't laugh or call me a fool...
I'm trying to set up a script that will go through my Music File directory and generate a set of symbolic links in a directory called "What's New". Within that directory there will be a "30 Days", "3 Months", "6 Months" and "A Year" directories. Within... (0 Replies)
Discussion started by: deckard
0 Replies
3. UNIX for Dummies Questions & Answers
Hi all!
I'm really hoping you can help me out here; now i have searched and searched and have at least worked out that you can't have a nested if statement with a 'done' in it (as i have) as you're killing the parent before the child.
So here's what i have, and here's hoping someone can help... (2 Replies)
Discussion started by: dalgibbard
2 Replies
4. Shell Programming and Scripting
Just started learning bash ,and I am confused with sintaksis
line 16: syntax error near unexpected token `else'
thanks
#!/bin/bash
echo -n "Enter: "
read num
if(($(echo ${#num}) == 0 ))
then
echo No arguments passed.Try again
elif
rem=$(echo $num | tr -d )
... (7 Replies)
Discussion started by: lio123
7 Replies
5. UNIX for Dummies Questions & Answers
Here's the input:
alpha, numeric or alphanumeric string ("line 1 string")
numeric string ("line 2 string")
numeric string ("line 3 string")
numeric string ("line 4 string")
...
where
- each numeric string is in a pattern that can be matched with RE but
- there can be any number of... (2 Replies)
Discussion started by: uiop44
2 Replies
6. Shell Programming and Scripting
Hello all,
I am writing up an input file and I was hoping I could get some guidance as to how to best consolidate these 2 awk statements for 1 while loop.
Here's my input file
# cat databases.lst
#NOTE: These entries are delimited by tabs "\t"
#oracleSID name/pass
#
db11 ... (2 Replies)
Discussion started by: Keepcase
2 Replies
7. Shell Programming and Scripting
HI everyone,
I am not able to find error in the script, when i run the script till
line No. 20
i.e, read var4
everything runs fine. After that the script exits out.
#!/bin/bash
echo -e "Want dryrun OR merge: \n "
read var1
if ] ; then
echo -e "\n Please select from the given... (10 Replies)
Discussion started by: rishi.aradhya
10 Replies
8. Shell Programming and Scripting
Hi,
i m trying to create script which logic is like below.
if ; then
x=`cat /tmp/testoutput.log | grep STOP | wc -l`
y=`cat /tmp/testoutput.log | grep RUN | wc -l`
if ; then
echo "process stop"
if ; then
echo "process running "
else
echo "file not found"
fi
----------------... (2 Replies)
Discussion started by: tapia
2 Replies
9. UNIX for Dummies Questions & Answers
I am having a problem with a nested if. I am sure I am overlooking something. I check for the existence of $Pidfl3 and it exists, o this condition I then want to check for the existence of a next file and remove it. The first if is executed, but on the second if I get test: argument expected.
My... (4 Replies)
Discussion started by: Charles Swart
4 Replies
LEARN ABOUT LINUX
logsave
LOGSAVE(8) System Manager's Manual LOGSAVE(8)
NAME
logsave - save the output of a command in a logfile
SYNOPSIS
logsave [ -asv ] logfile cmd_prog [ ... ]
DESCRIPTION
The logsave program will execute cmd_prog with the specified argument(s), and save a copy of its output to logfile. If the containing
directory for logfile does not exist, logsave will accumulate the output in memory until it can be written out. A copy of the output will
also be written to standard output.
If cmd_prog is a single hyphen ('-'), then instead of executing a program, logsave will take its input from standard input and save it in
logfile
logsave is useful for saving the output of initial boot scripts until the /var partition is mounted, so the output can be written to
/var/log.
OPTIONS
-a This option will cause the output to be appended to logfile, instead of replacing its current contents.
-s This option will cause logsave to skip writing to the log file text which is bracketed with a control-A (ASCII 001 or Start of
Header) and control-B (ASCII 002 or Start of Text). This allows progress bar information to be visible to the user on the console,
while not being written to the log file.
-v This option will make logsave to be more verbose in its output to the user.
AUTHOR
Theodore Ts'o (tytso@mit.edu)
SEE ALSO
fsck(8)
E2fsprogs version 1.41.14 December 2010 LOGSAVE(8)