11-08-2019
Quote:
What is your OS and shell?
OS: Red Hat Enterprise Linux Server release 6.6 (Santiago)
Shell : /bin/sh
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
nawk 'NR==FNR{a;next} {if($1 in a) print $1,"Found" else print}' OFS="," File_B File_A
The above code is not working help is appreciated (6 Replies)
Discussion started by: pinnacle
6 Replies
2. Programming
example sql:
select a.a1,b.b1,c.c1,d.d1,e.e1
from a
left outer join b on a.x=b.x
left outer join c on b.y=c.y
left outer join d on d.z=a.z
inner join a.t=e.t
I know how single outer or inner join works in sql.
But I don't really understand when there are multiple of them.
can... (0 Replies)
Discussion started by: robbiezr
0 Replies
3. UNIX for Dummies Questions & Answers
Hello,
My apologies if this has been posted elsewhere, I have had a look at several threads but I am still confused how to use these functions. I have two files, each with 5 columns:
File A: (tab-delimited)
PDB CHAIN Start End Fragment
1avq A 171 176 awyfan
1avq A 172 177 wyfany
1c7k A 2 7... (3 Replies)
Discussion started by: InfoSeeker
3 Replies
4. Shell Programming and Scripting
Hi All,
I have working (Perl) code to combine 2 input files into a single output file using the join function that works to a point, but has the following limitations:
1. I am restrained to 2 input files only.
2. Only the "matched" fields are written out to the "matched" output file and... (1 Reply)
Discussion started by: Katabatic
1 Replies
5. Shell Programming and Scripting
I have a vim outliner file like this:
Title
title 2
:Testing now
:testing 2
:testing 3
title 3
:testing
:ttt
:ttg
Is there a way to use a script or command to remove... (7 Replies)
Discussion started by: jostber
7 Replies
6. Web Development
Hello;
I am posting to get any help on my code that I have been struggling for some time. The project is to join two files each with 80k~180k rows. I want to merge them together by the shared common column. The problem of the shared column is partially matching, not exactly the same.
File1:... (5 Replies)
Discussion started by: yifangt
5 Replies
7. UNIX for Dummies Questions & Answers
file1:
Toronto:12439755:1076359:July 1, 1867:6
Quebec City:7560592:1542056:July 1, 1867:5
Halifax:938134:55284:July 1, 1867:4
Fredericton:751400:72908:July 1, 1867:3
Winnipeg:1170300:647797:July 15, 1870:7
Victoria:4168123:944735:July 20, 1871:10
Charlottetown:137900:5660:July 1, 1873:2... (2 Replies)
Discussion started by: mindfreak
2 Replies
8. Shell Programming and Scripting
Hi guys,
I need to use awk to join 2 files
file_1
A 001
B 002
C 003
file_2
A XX1
B XX2
output desired
A 001 XX1
B 002 missing
C 003 XX2
thank you! (2 Replies)
Discussion started by: g1org1o
2 Replies
9. Shell Programming and Scripting
Hi guys,
I need AWK to merge the following 2 files:
file1
1 a 1 1
2 b 2 2
3 c 3 3
4 d 4 4
file2
a a/a c/c a/c c/c a/a c/t
c c/t c/c a/t g/g c/c c/t
desired output:
1 a 1 1 a/a c/c a/c c/c a/a c/t
2 b 2 2 x x x x x x
3 c 3 3 c/t c/c a/t g/g c/c c/t
4 d 4 4 x x x x x x (2 Replies)
Discussion started by: g1org1o
2 Replies
10. Shell Programming and Scripting
Join and merge multiple files with duplicate key and fill void columns
Hi guys,
I have many files that I want to merge:
file1.csv:
1|abc
1|def
2|ghi
2|jkl
3|mno
3|pqr
file2.csv: (5 Replies)
Discussion started by: yjacknewton
5 Replies
LEARN ABOUT DEBIAN
shell-quote
SHELL-QUOTE(1p) User Contributed Perl Documentation SHELL-QUOTE(1p)
NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$SHELL -c". This doesn't work as intended:
ssh host touch 'hi there' # fails
It creates 2 files, hi and there. Instead, do this:
cmd=`shell-quote touch 'hi there'`
ssh host "$cmd"
This gives you just 1 file, hi there.
process find output
It's not ordinarily possible to process an arbitrary list of files output by find with a shell script. Anything you put in $IFS to
split up the output could legitimately be in a file's name. Here's how you can do it using shell-quote:
eval set -- `find -type f -print0 | xargs -0 shell-quote --`
debug shell scripts
shell-quote is better than echo for debugging shell scripts.
debug() {
[ -z "$debug" ] || shell-quote "debug:" "$@"
}
With echo you can't tell the difference between "debug 'foo bar'" and "debug foo bar", but with shell-quote you can.
save a command for later
shell-quote can be used to build up a shell command to run later. Say you want the user to be able to give you switches for a command
you're going to run. If you don't want the switches to be re-evaluated by the shell (which is usually a good idea, else there are
things the user can't pass through), you can do something like this:
user_switches=
while [ $# != 0 ]
do
case x$1 in
x--pass-through)
[ $# -gt 1 ] || die "need an argument for $1"
user_switches="$user_switches "`shell-quote -- "$2"`
shift;;
# process other switches
esac
shift
done
# later
eval "shell-quote some-command $user_switches my args"
OPTIONS
--debug
Turn debugging on.
--help
Show the usage message and die.
--version
Show the version number and exit.
AVAILABILITY
The code is licensed under the GNU GPL. Check http://www.argon.org/~roderick/ or CPAN for updated versions.
AUTHOR
Roderick Schertler <roderick@argon.org>
perl v5.8.4 2005-05-03 SHELL-QUOTE(1p)