Hello,
I've never used awk before, but from what I've read, it will best suit what I'm trying to do. I have 2 files. I need to replace strings in file1 with the first column of a matching string in file2. Below are examples:
File1:
random-string1
1112
1232
3213
2131
random-string2... (7 Replies)
hi;
my file2.txt:portname=1;list=10.11;l-
portname=2;list=10.12;l-
portname=3;list=10.13;l-
...
my file1.txt:;"{'sector=%27'}"\&>
so; i want to see:portname=1;list=10.11;l-;"{'sector=%27'}"\&>
portname=2;list=10.12;l-;"{'sector=%27'}"\&>
portname=3;list=10.13;l-;"{'sector=%27'}"\&>... (4 Replies)
Hello guys,
should be a very easy questn for you:
I need to delete strings in file1 based on the list of strings in file2.
like file2:
word1_word2_
word3_word5_
word3_word4_
word6_word7_
file1:
word1_word2_otherwords..,word3_word5_others... (7 Replies)
I have very limited coding skills but I'm wondering if someone could help me with this. There are many threads about matching strings in two files, but I have no idea how to add a column from one file to another based on a matching string.
I'm looking to match column1 in file1 to the number... (3 Replies)
Hello to all,
I hope somebody could help me with this:
I have this File1 (real has 5 million of lines):
Number Category
--------------- --------------------------------------
8734060355 3
8734060356 ... (6 Replies)
I have file 1 & file 2 with content mentioned below. I want to get the output as shown in file3.
Requirement:
check the content of column 1 & column 2, if value of column 1 in file1 matches with first column of file2 then remaining columns(2&3) of file2 should get replaced, also if value of... (4 Replies)
Dear All,
Need your help..:D
I am not regular on shell scripts..:(
I have 2 files..
Content of file1
cellRef 4};"4038_2_MTNL_KALAMBOLI"
cellRef 1020};"4112_3_RAINBOW_BLDG"
cellRef 134};"4049_2_TATA_HOSPITAL"
cellRef 1003};"4242_3_HITESH_CONSTRUCTION"
cellRef... (6 Replies)
I want to print only the lines in file2 that match file1, in the same order as they appear in file 1
file1
file2
desired output:
I'm getting the lines to match
awk 'FNR==NR {a++}; FNR!=NR && a' file1 file2
but they are in sorted order, which is not what I want:
Can anyone... (4 Replies)
I am trying to use awk to find all the $2 values in file2 which is ~30MB and tab-delimited, that are between $2 and $3 in file1 which is ~2GB and tab-delimited.
I have just found out that I need to use $1 and $2 and $3 from file1 and $1 and $2of file2 must match $1 of file1 and be in the range... (6 Replies)
Hi
Does anyone know of an efficient way to index a column of data in file2 to print the coresponding row in file1 which corresponds to the data in file2 AND 30 rows preceding and after the row in file1.
For example suppose you have a list of numbers in file2 (single column) as follows:... (6 Replies)
Discussion started by: Geneanalyst
6 Replies
LEARN ABOUT FREEBSD
mktemp
MKTEMP(1) BSD General Commands Manual MKTEMP(1)NAME
mktemp -- make temporary file name (unique)
SYNOPSIS
mktemp [-d] [-q] [-t prefix] [-u] template ...
mktemp [-d] [-q] [-u] -t prefix
DESCRIPTION
The mktemp utility takes each of the given file name templates and overwrites a portion of it to create a file name. This file name is
unique and suitable for use by the application. The template may be any file name with some number of 'Xs' appended to it, for example
/tmp/temp.XXXX. The trailing 'Xs' are replaced with the current process number and/or a unique letter combination. The number of unique
file names mktemp can return depends on the number of 'Xs' provided; six 'Xs' will result in mktemp selecting 1 of 56800235584 (62 ** 6) pos-
sible file names.
If mktemp can successfully generate a unique file name, the file is created with mode 0600 (unless the -u flag is given) and the filename is
printed to standard output.
If the -t prefix option is given, mktemp will generate a template string based on the prefix and the TMPDIR environment variable if set. The
default location if TMPDIR is not set is /tmp. Care should be taken to ensure that it is appropriate to use an environment variable poten-
tially supplied by the user.
If no arguments are passed or if only the -d flag is passed mktemp behaves as if -t tmp was supplied.
Any number of temporary files may be created in a single invocation, including one based on the internal template resulting from the -t flag.
The mktemp utility is provided to allow shell scripts to safely use temporary files. Traditionally, many shell scripts take the name of the
program with the pid as a suffix and use that as a temporary file name. This kind of naming scheme is predictable and the race condition it
creates is easy for an attacker to win. A safer, though still inferior, approach is to make a temporary directory using the same naming
scheme. While this does allow one to guarantee that a temporary file will not be subverted, it still allows a simple denial of service
attack. For these reasons it is suggested that mktemp be used instead.
OPTIONS
The available options are as follows:
-d Make a directory instead of a file.
-q Fail silently if an error occurs. This is useful if a script does not want error output to go to standard error.
-t prefix
Generate a template (using the supplied prefix and TMPDIR if set) to create a filename template.
-u Operate in ``unsafe'' mode. The temp file will be unlinked before mktemp exits. This is slightly better than mktemp(3) but still
introduces a race condition. Use of this option is not encouraged.
EXIT STATUS
The mktemp utility exits 0 on success, and >0 if an error occurs.
EXAMPLES
The following sh(1) fragment illustrates a simple use of mktemp where the script should quit if it cannot get a safe temporary file.
tempfoo=`basename $0`
TMPFILE=`mktemp /tmp/${tempfoo}.XXXXXX` || exit 1
echo "program output" >> $TMPFILE
To allow the use of $TMPDIR:
tempfoo=`basename $0`
TMPFILE=`mktemp -t ${tempfoo}` || exit 1
echo "program output" >> $TMPFILE
In this case, we want the script to catch the error itself.
tempfoo=`basename $0`
TMPFILE=`mktemp -q /tmp/${tempfoo}.XXXXXX`
if [ $? -ne 0 ]; then
echo "$0: Can't create temp file, exiting..."
exit 1
fi
SEE ALSO mkdtemp(3), mkstemp(3), mktemp(3), environ(7)HISTORY
A mktemp utility appeared in OpenBSD 2.1. This implementation was written independently based on the OpenBSD man page, and first appeared in
FreeBSD 2.2.7. This man page is taken from OpenBSD.
BSD December 30, 2005 BSD