With cut -c 8-13 myfile,
I am getting some numeric value.
In my shell script I am trying to assign something like this,
var=cut -c 8-13 myfile
But at the time of execution I am getting -c is not found.
If I dont assign, then script executes well.
Can we not simply use the value from one... (8 Replies)
I am new to unix shell scripting.
I was trying to convert each lines in a file to upper case.
I know how to convert the whole file.
But here i have to do line by line.
I am getting it in the below mentioned script
#!/bin/bash
#converting lower to upper in a file
#tr "" "" <file1... (3 Replies)
Hi
I am trying to store the output of awk into a variable in a shell script. I can run it successfully from the command line but not from a ksh shell script.
ls -al test.txt | grep -v grep | awk '{print $1}'
returns -rw-r--r--
#!/bin/ksh
perm=$(`ls -al test.txt | grep -v grep | awk... (2 Replies)
i have to do a check in my UNIX script to see whats saved in the database. depending on whats there will fork data to certain functions. However i do not know how to capture SQL output into a UNIX variable.
Below is what i have tried, but i get an error:
Error 3706 Failure 3706 Syntax error:... (3 Replies)
I am new to shell programming, i have a requierement to assign a file name into a variable.
for ex:
the file name are below
603_2009_09_24_34.csv
702_2009_10_25_10.csv
for ex: i need to get the file 603_2009_09_24_34.csv but first 3 didgits are fixed but rest of the digits are not
below is... (3 Replies)
Hi i have a problem in redirecting the ouput to a variable.I want to use that variable in the script itself.
here is my problem...
unique.out "UNIX" | grep Encrypted | awk '{FS=" "} {print $2}' .
unique.out is and executable file that generates uniqe id WITH THE FOLLOWING FORMAT.
... (1 Reply)
Hi,
I have a 3rd party tool on Solaris 8. I am running it thorugh my script but I am not able to capture its output into a variable.
Like, I tried, but did not work.
output=`/usr/bin/myTool`
echo $output
Also, I tried saving in a file but when I run, output is always shown on the... (19 Replies)
i was wondering is there anyway to take the output of a command and put it into a variable??
what i need to to is only take a certain part of the output that lies between <"data needed ">
---------- Post updated at 09:39 PM ---------- Previous update was at 09:38 PM ----------
and place... (6 Replies)
Hi all,
Hope someone can help me out here.
I have this BASH script (see below)
My problem lies with the variable path.
The output of the command find will give me several fields. The 9th field is the path. I want to captured that and the I want to filter this to a specific level.
The... (6 Replies)
I have a below syntax its working fine...
var12=$(ps -ef | grep apache | awk '{print $2,$4}')
Im getting expected output as below:
printf "%b\n" "${VAR12}"
dell 123
dell 456
dell 457
Now I wrote a while loop.. the output of VAR12 should be passed as input parameters to while loop and results... (5 Replies)
Discussion started by: sam@sam
5 Replies
LEARN ABOUT OSX
urandom
RANDOM(4) BSD Kernel Interfaces Manual RANDOM(4)NAME
random , urandom -- random data source devices.
SYNOPSIS
pseudo-device random
DESCRIPTION
The random device produces uniformly distributed random byte values of potentially high quality.
To obtain random bytes, open /dev/random for reading and read from it.
To add entropy to the random generation system, open /dev/random for writing and write data that you believe to be somehow random.
/dev/urandom is a compatibility nod to Linux. On Linux, /dev/urandom will produce lower quality output if the entropy pool drains, while
/dev/random will prefer to block and wait for additional entropy to be collected. With Yarrow, this choice and distinction is not necessary,
and the two devices behave identically. You may use either.
OPERATION
The random device implements the Yarrow pseudo random number generator algorithm and maintains its entropy pool. Additional entropy is fed
to the generator regularly by the SecurityServer daemon from random jitter measurements of the kernel. SecurityServer is also responsible
for periodically saving some entropy to disk and reloading it during startup to provide entropy in early system operation.
You may feed additional entropy to the generator by writing it to the random device, though this is not required in a normal operating envi-
ronment.
LIMITATIONS AND WARNINGS
Yarrow is a fairly resilient algorithm, and is believed to be resistant to non-root. The quality of its output is however dependent on regu-
lar addition of appropriate entropy. If the SecurityServer system daemon fails for any reason, output quality will suffer over time without
any explicit indication from the random device itself.
Paranoid programmers can counteract this risk somewhat by collecting entropy of their choice (e.g. from keystroke or mouse timings) and seed-
ing it into random directly before obtaining important random numbers.
FILES
/dev/random
/dev/urandom
HISTORY
A random device appeared in the Linux operating system.
Darwin September 6, 2001 Darwin