The IFS (input field separator) is set to whitespace characters by default (space, tab, newline). If you use the 'while read' combination, you can assign each line to a variable (basically just like pludi has shown), except you do not need to specify the IFS.
Code:
-bash-3.2$ cat test.txt | while read i; do echo $i; done;
serial: 23124
hostname: server1
Hi,
have a basic query.
Please see the below code:
list="one two three"
for var in $list ; do
echo $var
list="nolist"
Done
Wht if I want to print only first/ last line in the list
Eg one & three
Regards
er_ashu (3 Replies)
Hi! I have a simple question about using a for loop.
I'm trying to open up all the zip files in the currect directory with ark, but I am getting the error "bash: syntax error near unexpected token `for $i ; do ark $i ; done ;
I looked in the info pages for bash, but I can't seem to figure... (2 Replies)
Hi everyone - just like to say great forum...I've learned a lot off here but I just can't figure this one out...(first post)
I'm writing a script to monitor a directory and email the latest modified file....(I realize there are better ways than I'm trying here...I don't like copying and pasting... (5 Replies)
Hi,
I have a loop like this -
while read item
do
// fire insert query
done < itemList.txt
The itemList.txt has say, 1000 records. Now what I do is that rhough another program, I make the itemList.txt EMPTY, but still the INSERT query keeps firing the sequence of records.
... (18 Replies)
hey guys
I would really appreciate some help, i need to do a project for a job that requires minimal UNIX scripting and im REALLY stuck
basically Im stuck at what i believe is something really simple but i just dont have a clue how to do it efficiently and properly and i REALLY appreciate some... (16 Replies)
Hi, I am trying to make a script to manage log. I want to write the name of the .gz I moved and the date :
for i in `ls $replog/*.gz`
do
echo " $i "
`echo $i date +%d:%m:%Y`
`echo $datee `>> $replog/mrnet.log
mv $i /var/log/vieux-logs
done
I need to echo... (10 Replies)
OS : RHEL 6.1
Shell : Bash
I had a similair post on this a few weeks back. But I didn't explain my requirements clearly then. Hence starting a new thread now.
I have lots of files in /tmp/stage directory as show below.
I want to loop through each files to run a command on each file.
I... (8 Replies)
Hi,
Sorry if this is a newbie question. I guess you can use either awk or shell script for this sequence of operations, but knowing very little about either of them I'm not sure how I should try to write this.
The basic objective is to copy certain files that are scattered all over my... (10 Replies)
I'm obviously very new to this. I'm trying to write a simple for loop that will read the directory names in /Users and then copy a file into the same subdir in each user directory.
I have this, and it works but it isn't great.
#!/bin/bash
HOMEDIRS=/Users/*
for dirs in $HOMEDIRS; do
if ];... (5 Replies)
Oracle Linux : 6.4/bash shell
In the below I want to break out of the loop when it enters the 5th iteration.
#!/bin/bash
for i in 1 2 3 4 5 6
do
echo "$i"
if
echo "Oh Nooo... i = $i. I need to stop the iteration and jump out of the loop"
then break
fi
done
But, it only... (3 Replies)
Discussion started by: John K
3 Replies
LEARN ABOUT OSX
vis
VIS(1) BSD General Commands Manual VIS(1)NAME
vis -- display non-printable characters in a visual format
SYNOPSIS
vis [-cbflnostw] [-F foldwidth] [file ...]
DESCRIPTION
The vis utility is a filter for converting non-printable characters into a visual representation. It differs from 'cat -v' in that the form
is unique and invertible. By default, all non-graphic characters except space, tab, and newline are encoded. A detailed description of the
various visual formats is given in vis(3).
The options are as follows:
-b Turns off prepending of backslash before up-arrow control sequences and meta characters, and disables the doubling of backslashes.
This produces output which is neither invertible or precise, but does represent a minimum of change to the input. It is similar to
``cat -v''.
-c Request a format which displays a small subset of the non-printable characters using C-style backslash sequences.
-F Causes vis to fold output lines to foldwidth columns (default 80), like fold(1), except that a hidden newline sequence is used,
(which is removed when inverting the file back to its original form with unvis(1)). If the last character in the encoded file does
not end in a newline, a hidden newline sequence is appended to the output. This makes the output usable with various editors and
other utilities which typically do not work with partial lines.
-f Same as -F.
-l Mark newlines with the visible sequence '$', followed by the newline.
-n Turns off any encoding, except for the fact that backslashes are still doubled and hidden newline sequences inserted if -f or -F is
selected. When combined with the -f flag, vis becomes like an invertible version of the fold(1) utility. That is, the output can be
unfolded by running the output through unvis(1).
-o Request a format which displays non-printable characters as an octal number, ddd.
-s Only characters considered unsafe to send to a terminal are encoded. This flag allows backspace, bell, and carriage return in addi-
tion to the default space, tab and newline.
-t Tabs are also encoded.
-w White space (space-tab-newline) is also encoded.
SEE ALSO unvis(1), vis(3)HISTORY
The vis command appeared in 4.4BSD.
BUGS
Due to limitations in the underlying vis(3) function, the vis utility does not recognize multibyte characters, and thus may consider them to
be non-printable when they are in fact printable (and vice versa).
BSD June 25, 2004 BSD