hi all, I need some help in regards of how to process just a sample from a large .txt file
I have a large file from many new lines (say above 200.000 new lines), I need a script that process just a sample of it, say 10.000 bur a random sample (taking rows from top top to the the bottom)
Could someone help? I will be happy, if you could also enable me to give the number of sample as an input - for example, if I need 20.000 instead of 10.000 to give the 20.000 as input
Could you please let me know how do you know that it will give ca 10%, for example; if I know the number of rows before hand; how I should play with the
According to the standards, awk's rand() function returns a pseudo-random number x such that 0 < x < 1. If we assume that the pseudo-random number is uniformly distributed (which is not required by the standards), then (rand() <= .01) should be true approximately 1% of the time. For 10%, the test would be ICODE](rand() <= .1)[/ICODE] (again, assuming rand() produces a uniformly distributed set of values).
Note that when using "random" numbers, there is certainly no guarantee that using (rand() <= 10000/200000) as the test in Jotne's script will print exactly 10,000 lines from a 200,000 line file.
Sample shell script to add a user:
Today i learn how to add a user to linux server with a password.
#!/bin/bash
# Script to add a user to Linux system
if ; then
read -p "Enter username : " username
read -s -p "Enter password : " password
egrep "^$username" /etc/passwd >/dev/null
if ;... (0 Replies)
Below is the code. Its the 1st line of a file.
How can I remove the bracket and display like below.
123 web int 1 09:30:45 2013
I dont want to use AWK or SED or PERL. I need to use only the bash shell scripting commands to do it. (3 Replies)
Hi,
I need a sample script to validate all the database objects like
1. table structure(columns, datatypes,key contraints if any)
2. synonyms
3. grants
4. indexes
....etc
thank you! (2 Replies)
Dear All,
I have a template xml file like below.
....Some---Header.......
<SignalPreference>
...
<SignalName>STRING</SignalName>
...
</SignalPreference>
......Some formatting text.......
<SignalPreference>
.........
... (3 Replies)
Hello, I'm new to this forum, and I apologize in advance if I did something wrong here.
I am pretty stumped here as I am still getting the error message, "./comc1.sh: test: argument expected." after executing the script itself.
Here's the script file I modified:
I tried executing line 4... (1 Reply)
1. Can somebody tell me the log file location of HPVM where all the events of guest OS are reported ?
2. And if possible a log file with important events in it ? (1 Reply)
i have a file having 30 million records.i want to generate a file having say 5% of total records in another file. the records in the new file shud be randomly generated. (1 Reply)
Hi everybody,
Does somebody has a sample of script that control a daemon?
for example use loop until the daemon is on and if is not on
do something else?
Thanks
Pier (0 Replies)