An awk statement has the form:
Conditions in awk control the execution of actions and actions are executed when the condition is true.
If the condition is true (1 is true) and there are no actions between braces, awk prints the current record by default.
The NF variable gives the number of fields in a line.
If a line has 1 column (NF=1) the condition NF-1 (1-1=0) is false, so only lines with more then one field should be printed.
This condition is true if a second column exists, all lines with one field are ignored.
All,
I have a file with text as shown below. I want the o/p file with generated values in the first column as shown in the o/p file. Pls note that the size of my file is 6 GB. How do i do this ?
Input file
999999abcdef
999999ghijkl
999999mnopq
777777rosesarered
777777skyisblue
Output... (1 Reply)
Is there a way to tell awk to ignore the first 11 lines of a file?? example, I have a csv file with all the heading information in the first lines. I want to split the file into 5-6 different files but I want to retain the the first 11 lines of the file.
As it is now I run this command:
... (8 Replies)
Hi
am having a file which looks like this
i want to get unique values in column2 and sum up the corresponding column3 values and discard the column4 and then write the output in different file.
i.e the output has to be like
i.e
07-Jun-2009 919449829088 52 lessrv1
07-Jun-2009... (2 Replies)
Hi
I am new to Awk programming , i would appreciate if anyone help me with the below scenario
i have text file arranged in rows and columns like below
11004 04493384 26798 CASSI0000I Server manager initialization started
111004 04493486 26798 CASSI4005I Retrieving ES... (7 Replies)
Hello,
For the input file, I am trying to split those records which have multiple values seperated by '|' in the last input field, into multiple records and each record corresponds to the common input fields + one of the value from the last field.
I was trying with an example on this forum... (4 Replies)
I'm using a shell script to manipulate a data file. I have a large file with two sets of data samples (tracking memory consumption) taken over a long period of time, so I have many samples. The problem is that all the data is in the same file so that each sample contains two sets of data.... (2 Replies)
Dear Gents,
Could you please help me to solve this problem.
I am getting the average of a column for same duplicate records in this case locate in column 1. The average is computed from column 5 from all duplicate records in column 1. Normallly the values in column 5 is constant so the... (3 Replies)
Hi Guys,
I am having below tables in oracle
T1
ID F_TYPE F_AMT DATE_COL
1 F 6 11-Feb-16
1 D 2 11-Feb-16
1 D 2 11-Feb-16
1 F 6 11-Feb-16
1 F 2 12-Mar-16
1 D 3 12-Mar-16
1 F 4 10-Apr-16
1 F 4 11-Apr-16
1 D 1 11-Apr-16
T2
ID START_DATE END_DATE F_ID FLAG... (0 Replies)
The awk below executes and update the desired field in my first awk. However, the white space between
nonsynonymous SNV in $9 is being split into tabs and my attempt to correct this does not update the field
unless it is removed. I am not sure what I am doing wrong? Thank you :).
file1
... (4 Replies)
I recently had to remove a number of columns from a sorted copy of a file, but couldn't get the cut command to take fields out, just what to keep. This is the only thing I could find as an example, but could it be simplified?
tstamp=`date +%H%M%S`
grep -v "T$" filename |egrep -v "^$" |sort... (3 Replies)
Discussion started by: wbport
3 Replies
LEARN ABOUT CENTOS
wait_event_interruptible_exclusive_locked_irq
WAIT_EVENT_INTERRUPT(9) Driver Basics WAIT_EVENT_INTERRUPT(9)NAME
wait_event_interruptible_exclusive_locked_irq - sleep until a condition gets true
SYNOPSIS
wait_event_interruptible_exclusive_locked_irq(wq, condition);
ARGUMENTS
wq
the waitqueue to wait on
condition
a C expression for the event to wait for
DESCRIPTION
The process is put to sleep (TASK_INTERRUPTIBLE) until the condition evaluates to true or a signal is received. The condition is checked
each time the waitqueue wq is woken up.
It must be called with wq.lock being held. This spinlock is unlocked while sleeping but condition testing is done while lock is held and
when this macro exits the lock is held.
The lock is locked/unlocked using spin_lock_irq/spin_unlock_irq functions which must match the way they are locked/unlocked outside of this
macro.
The process is put on the wait queue with an WQ_FLAG_EXCLUSIVE flag set thus when other process waits process on the list if this process
is awaken further processes are not considered.
wake_up_locked has to be called after changing any variable that could change the result of the wait condition.
The function will return -ERESTARTSYS if it was interrupted by a signal and 0 if condition evaluated to true.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 WAIT_EVENT_INTERRUPT(9)