05-10-2013
It could also be read it as 4 (or more)
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1. UNIX for Dummies Questions & Answers
Hi all,
I have a file that contains a list of codes (shown below).
I want to 'uniq' the file using only the first field. Anyone know an easy way of doing it?
Cheers,
Dave
##### Input File #####
1xr1 1xws 1yxt 1yxu 1yxv 1yxx 2o3p 2o63 2o64 2o65
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2. UNIX for Dummies Questions & Answers
Hi ;
I have a question regarding the uniq command in unix
How do I uniq 3rd field in a file ?
original file :
zoom coord 39 18652 39 18652
zoom coord 39 18653 39 18653
zoom coord 39 18818 39 18818
zoom coord 39 18840 39 18840
zoom coord 41 15096 41 15096
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3. Shell Programming and Scripting
How can I use uniq on a certain field or what else could I use? If I want to use uniq on the second field and the output would remove one of the lines with a 5.
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jane 3 leg
jon 4 head
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Hello
Wondering if anybody can advise me how I can sort the below file so it only displays lines with the latest versions of an object? As you'll see some of the scripts listed in my file have more than one version number (version number is after the file extension). E.g. cdm_bri.pkb has... (2 Replies)
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Hi New to unix.
I want to display only the unrepeated lines from a file using first field.
Ex:
1234 uname1 status1
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I used
sort filename | uniq -u
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1234 uname1 status1
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1234 uname3 status3
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I have a flatfile A.txt
2012/12/04 14:06:07 |trees|Boards 2, 3|denver|mekong|mekong12
2012/12/04 17:07:22 |trees|Boards 2, 3|denver|mekong|mekong12
2012/12/04 17:13:27 |trees|Boards 2, 3|denver|mekong|mekong12
2012/12/04 14:07:39 |rain|Boards 1|tampa|merced|merced11
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5 efgh
7 efxI have tried
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Hi All,
I have a file like this(having 2 column).
Column 1: like a,b,c....
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file.
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LEARN ABOUT SUNOS
pthread_rwlock_unlock
pthread_rwlock_unlock(3C) pthread_rwlock_unlock(3C)
NAME
pthread_rwlock_unlock - unlock read-write lock object
SYNOPSIS
cc -mt [ flag... ] file... -lpthread [ library... ]
#include <pthread.h>
int pthread_rwlock_unlock(pthread_rwlock_t *rwlock);
The pthread_rwlock_unlock() function is called to release a lock held on the read-write lock object referenced by rwlock. Results are unde-
fined if the read-write lock rwlock is not held by the calling thread.
If this function is called to release a read lock from the read-write lock object and there are other read locks currently held on this
read-write lock object, the read-write lock object remains in the read locked state. If this function releases the calling thread's last
read lock on this read-write lock object, then the calling thread is no longer one of the owners of the object. If this function releases
the last read lock for this read-write lock object, the read-write lock object will be put in the unlocked state with no owners.
If this function is called to release a write lock for this read-write lock object, the read-write lock object will be put in the unlocked
state with no owners.
If the call to the pthread_rwlock_unlock() function results in the read-write lock object becoming unlocked and there are multiple threads
waiting to acquire the read-write lock object for writing, the scheduling policy is used to determine which thread acquires the read-write
lock object for writing. If there are multiple threads waiting to acquire the read-write lock object for reading, the scheduling policy is
used to determine the order in which the waiting threads acquire the read-write lock object for reading. If there are multiple threads
blocked on rwlock for both read locks and write locks, it is unspecified whether the readers acquire the lock first or whether a writer
acquires the lock first.
Results are undefined if any of these functions are called with an uninitialized read-write lock.
If successful, the pthread_rwlock_unlock() function returns 0. Otherwise, an error number is returned to indicate the error.
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
|MT-Level |MT-Safe |
+-----------------------------+-----------------------------+
pthread_rwlock_init(3C), pthread_rwlock_rdlock(3C), pthread_rwlock_wrlock(3C), pthread_rwlockattr_init(3C), attributes(5), standards(5)
23 Mar 2005 pthread_rwlock_unlock(3C)