I have a text file with a very long list of dates, one date per line. Each date is in the same format yyyymmdd. I need the dates to be in mmddyyyy format.
This is part of a larger tcsh shell script.
I am just learning unix and came up with:
for each line in file
for each character in... (4 Replies)
Please I need to rearrange data acquired by USB port from a sensor network. The information is mixed and I need to convert it into a kind of table. This is my input file:
Node 4D5A joined
Temperature: 27,5
Humidity: 40
Dew Point: 23
No motion detected
LUX: 389
Temperature: 28
Humidity: 41... (5 Replies)
Hi all,
I need to rearrange the content of the file. I need to move line 1 to 4, 2 to 3, 3 to 2, and 4 to 1.
IPlease help. I was thinking about using head and tail command.
Here is the original file.
aa
bb
cc
dd
Here is what I need it to be.
dd
cc
bb
aa
Thanks. (6 Replies)
hi!
in awk, i have a file like this:
Trace1: WRIT,Trace2: BLAN,Trace3: BLAN,
-47.2120018005371,,,39815.4809027778
-46.3009986877441,,,39815.4809027778
-46.277000427246,,,39815.4809143519
-46.7389984130859,,,39815.4809259259
-46.3460006713867,,,39815.4809259259... (10 Replies)
Hi, every one. I have two files ,one is in matrix like this, one is a list with the same data as the matrix.
AB AE AC AD AA AF
SA 3 4 5 6 4 6
SC 5 7 2 8 4 3
SD 4 6 5 3 8 3
SE 45 ... (5 Replies)
This is my first post, I apologize if I have broken rules.
Some assistance with the following will be very helpful.
I have a couple of files, both should ultimately have common columns only, arranged in the same order.
This file needs to be transposed, to bring the rows to columns
... (2 Replies)
I have 1 row which contains abouts 20000 base64 string.
e.g:
/p4bdllBS8qcvW/69GUYej8nEv6gwt7UAYl0g==WZdjwTUQX9UEKsT/zWaZdQ==uI would like rearrange this file by base64 strings. So the output should be this ( 1 string in 1 row):
69GUYej8nEv6gwt7UAYl0g==
WZdjwTUQX9UEKsT/zWaZdQ==How could I do... (4 Replies)
Hello,
I have some tab delimited text data,
index name chg_p chg_m
1 name,1 1 0
2 name,2 1 1
3 name,3 1 0
4 name,4 1 0
5 name,5 1 1
I need to duplicate the "index" column, call it "id" and insert it after the... (8 Replies)
I want to rearrange the fields of delimited text file after sorting first line (only):
input file:
a_13;a_2;a_1;a_10
13;2;1;10
the result should be:
a_1;a_2;a_10;a_13
1;2;10;13
any help would be appreciated
andy (20 Replies)
hi all,
trying this using shell/bash with sed/awk/grep
I have two files, one containing one column, the other containing multiple columns (comma delimited).
file1.txt
abc12345
def12345
ghi54321
...
file2.txt
abc1,text1,texta
abc,text2,textb
def123,text3,textc
gh,text4,textd... (6 Replies)
Discussion started by: shogun1970
6 Replies
LEARN ABOUT SUSE
flock
FLOCK(1) H. Peter Anvin FLOCK(1)NAME
flock - Manage locks from shell scripts
SYNOPSIS
flock [-sxon] [-w timeout] lockfile [-c] command...
flock [-sxon] [-w timeout] lockdir [-c] command...
flock [-sxun] [-w timeout] fd
DESCRIPTION
This utility manages flock(2) locks from within shell scripts or the command line.
The first and second forms wraps the lock around the executing a command, in a manner similar to su(1) or newgrp(1). It locks a specified
file or directory, which is created (assuming appropriate permissions), if it does not already exist.
The third form is convenient inside shell scripts, and is usually used the following manner:
(
flock -s 200
# ... commands executed under lock ...
) 200>/var/lock/mylockfile
The mode used to open the file doesn't matter to flock; using > or >> allows the lockfile to be created if it does not already exist, how-
ever, write permission is required; using < requires that the file already exists but only read permission is required.
By default, if the lock cannot be immediately acquired, flock waits until the lock is available.
OPTIONS -s, --shared
Obtain a shared lock, sometimes called a read lock.
-x, -e, --exclusive
Obtain an exclusive lock, sometimes called a write lock. This is the default.
-u, --unlock
Drop a lock. This is usually not required, since a lock is automatically dropped when the file is closed. However, it may be
required in special cases, for example if the enclosed command group may have forked a background process which should not be hold-
ing the lock.
-n, --nb, --nonblock
Fail (with an exit code of 1) rather than wait if the lock cannot be immediately acquired.
-w, --wait, --timeout seconds
Fail (with an exit code of 1) if the lock cannot be acquired within seconds seconds. Decimal fractional values are allowed.
-o, --close
Close the file descriptor on which the lock is held before executing command. This is useful if command spawns a child process
which should not be hold ing the lock.
-c, --command command
Pass a single command to the shell with -c.
-h, --help
Print a help message.
AUTHOR
Written by H. Peter Anvin <hpa@zytor.com>.
COPYRIGHT
Copyright (C) 2003-2006 H. Peter Anvin.
This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU-
LAR PURPOSE.
SEE ALSO flock(2)AVAILABILITY
The flock command is part of the util-linux-ng package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/.
flock utility 4 Feb 2006 FLOCK(1)