09-06-2011
Quote:
egrep -v [a-zA-Z] <filename>
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi,
I would like to know how to solve one of my problems using expert unix commands.
I have a file with occasional blank lines;
for example;
dertu
frthu
fghtu
frtty
frtgy
frgtui
frgtu
ghrye
frhutp
frjuf
I need to edit the file so that the file looks like this; (10 Replies)
Discussion started by: Lucky Ali
10 Replies
2. Shell Programming and Scripting
Hi all,
This should be very easy but I can't figure it out...
I have a file that looks like this:
@SRR057408.1 FW8Y5CK02R652T length=34
AGCAGTGGTATCAACGCAGAGTAAGCAGTGGTAT
+SRR057408.1 FW8Y5CK02R652T length=34
FIIHFF6666?=:88@@@BBD:::?@ABBAAA>8
@SRR057408.2 FW8Y5CK02TBMHV length=52... (1 Reply)
Discussion started by: kmkocot
1 Replies
3. Shell Programming and Scripting
abc.dat
tty cpu
tin tout us sy wt id
0 0 7 3 19 71
extended device statistics
r/s w/s kr/s kw/s wait actv wsvc_t asvc_t %w %b device
0.0 133.2 0.0 682.9 0.0 1.0 0.0 7.2 0 79 c1t0d0
0.2 180.4 0.1 5471.2 3.0 2.8 16.4 15.6 15 52 aaaaaa1-xx
I want to skip first 5 line... (4 Replies)
Discussion started by: kchinnam
4 Replies
4. Shell Programming and Scripting
Could someone please point me in the right direction with the following?
I have a program that generates logs that contains sections like this:
IMAGE INPUT
81 0 0.995 2449470 0 1726 368 1 0.0635 0.3291
82 0 1.001 2448013 0 1666 365 1 0.0649 ... (4 Replies)
Discussion started by: euval
4 Replies
5. UNIX for Dummies Questions & Answers
##### (0 Replies)
Discussion started by: lucasvs
0 Replies
6. UNIX for Dummies Questions & Answers
I have a spreadsheet of extremely long rows of numbers. I want to print only the last column. Tried using printf but there seems to be too many rows.
example:
3 100 34 7 23 0 8 ..... X
400 203 778 1 ..........Y
58 3 9 0 100 ..........Z
I only want to print X, Y and... (1 Reply)
Discussion started by: jimmyf
1 Replies
7. Shell Programming and Scripting
Is there other way then this only solution I have found to print lines with numbers only?
file.txtone
two
three
3
four
five
5tt
6gfjdfgdf
9
66
six
0
seven
7
eight
546546
gffdg445gfg
fd644 (7 Replies)
Discussion started by: Jotne
7 Replies
8. Shell Programming and Scripting
Hi
I am getting an argument which specifies the range of numbers. eg: 7-15
Is there a way that i can easily (avoiding loop) print the range of number between and including the specified above.
The above example should translate to 7,8,9,10,11,12,13,14,15 (3 Replies)
Discussion started by: tostay2003
3 Replies
9. UNIX for Dummies Questions & Answers
URGENT HELP IS NEEDED!!
I am looking to move matching lines (01 - 07) from File1 and 77 tab the matching string from File2, to File3.txt. I am almost done but
- Currently, script is not printing lines to File3.txt in order.
- Also the matching lines are not moving out of File1.txt
... (1 Reply)
Discussion started by: High-T
1 Replies
10. UNIX for Beginners Questions & Answers
I have a directory of files, I can show the number of lines in each file and order them from lowest to highest with:
wc -l *|sort
15263 Image.txt
16401 reference.txt
40459 richtexteditor.txt
How can I also print the number of unique lines in each file?
15263 1401 Image.txt
16401... (15 Replies)
Discussion started by: spacegoose
15 Replies
LEARN ABOUT CENTOS
shell-quote
SHELL-QUOTE(1) User Contributed Perl Documentation SHELL-QUOTE(1)
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 v5.16.3 2010-06-11 SHELL-QUOTE(1)