Using sed to change values after a specific string
Hello I have a script that searches a file for a specific string and then changes the nth column after that string. I have searched online for how to do this with sed but have not seemed to find a solution that works for me. I am using bash.
Some background info:
- Currently I am using awk to do this successfully.
- I was informed that sed with --in place set would be faster
the awk command I use is as follows
What this does is finds the line where 'SITES' is written in the file (a label for that row) then changes the second element (column) of that row to mx (which is 50).
1. I want to know if its true that using sed will be faster (considering this is looped for thousands of files)
2. Also want to know how to implement with sed if thats the case. So far I have tried (and failed) the following:
I think there might be a misconception that sed is faster and from what I researched awk is the better option. The person who told me sed is faster has much more experience than me but I have a feeling he is incorrect.
Last edited by prodigious8; 10-21-2015 at 03:38 PM..
GNU sed version 4.1.4 on Windows XP SP3 from GnuWin32
I think that I've come across a seemingly simple text file change problem on a INI formatted file that I can't do with SED without side effects edge cases biting me. I've tried to think of various ways of doing this elegantly and quickly... (5 Replies)
using sed to replace a specific string on a specific line number using variables
this is where i am at
grep -v WARNING output | grep -v spawn | grep -v Passphrase | grep -v Authentication | grep -v '/sbin/tfadmin netguard -C'| grep -v 'NETWORK>' >> output.clean
grep -n Destination... (2 Replies)
Ok so all i'm trying to do here is output a file and change the color of a specific word. I can't use grep with color because I need all lines of the file not just lines that match the pattern.
I can get this substitution to work but when it displays it shows exactly what i'm putting it rather... (14 Replies)
Hello,
I have this file.
aaa
port=1234
time
bbb
port=2233
name
ccc
port=4444
name
Is there any way with sed to change only the occurence of "port" which comes after section to have as output : (12 Replies)
Hi everyone,
I was wondering how could from a file where each row is separated by tabulations, the row values where are in blank replace them by a string or value.
My file has this form:
26/01/09 13:45:00 0 0
26/01/09 14:00:00 1495.601318 0
26/01/09 14:15:00 1495.601318 0 ... (4 Replies)
Dear All,
New to Linux/Unix OS, my Linux version is 2010 x86_64 x86_64 x86_64 GNU/Linux
As titled, I wonder if you can help to provide a solution to find and change an specific string in a file
The file include a lots of data in following configuration but might be various in... (3 Replies)
Hi,
I am writing a shell script where I want that # should be added in all those lines as the first character where the pattern matches.
file has lot of functions defined
a.sh
#!/bin/bash
fn a {
beautiful evening
sunny day
}
fn b {
}
fn c {
hello world .its a beautiful day
... (12 Replies)
Hello All of Master Script ,
i need help to solve my problem
before :
mount /dev/rdsk/c1t69d0s6 /dev/rdsk/c1t69d0s6 /vol/cl123/PURGE1 ufs
mount /dev/rdsk/c1t70d0s6 /dev/rdsk/c1t70d0s6 /vol/cl123/PURGE2 ufs
expected :
mount /dev/dsk/c1t69d0s6 /dev/rdsk/c1t69d0s6 /PURGE1 ufs
mount ... (3 Replies)
I am trying to use awk to change a specific string in a field, if it is found, to another value. In the tab-delimited file the text in bold in $3 contains the string 23, which is always right before a ., if it is present.
I am trying to change that string to X, keeping the formatting and the... (3 Replies)
Hi,
Could you please help me finding a way to replace a specific value in a text block when matching a key pattern ?
I got the keys and the values from a command similar to:
echo -e "key01 Nvalue01-1 Nvalue01-2 Nvalue01-3\nkey02 Nvalue02-1 Nvalue02-2 Nvalue02-3 \nkey03 Nvalue03-1... (2 Replies)
Discussion started by: alex2005
2 Replies
LEARN ABOUT DEBIAN
logprof.conf
LOGPROF.CONF(5) AppArmor LOGPROF.CONF(5)NAME
logprof.conf - configuration file for expert options that modify the behavior of the AppArmor aa-logprof(1) program.
DESCRIPTION
The aa-logprof(1) program can be configured to have certain default behavior by the contents of logprof.conf.
The [qualifiers] section lists specific programs that should have a subset of the full ix/px/ux list when asking what mode to execute it
using.
Since creating a separate profile for /bin/bash is dangerous, we can specify that for /bin/bash, only (I)nherit, (U)nconstrained, and
(D)eny should be allowed options and only those will show up in the prompt when we're asking about adding that to a profile.
Likewise, if someone currently exec's /bin/mount in ix or px mode, things won't work, so we can provide only (U)nconstrained and (D)eny as
options.
And certain apps like grep, awk, sed, cp, and mkdir should always inherit the parent profile rather than having their own profile or
running unconfined, so for them we can specify that only (I)nherit and (D)eny are the allowed options.
Any programs that are not listed in the qualifiers section get the full (I)nherit / (P)rofile / (U)nconstrained / (D)eny option set.
If the user is doing something tricky and wants different behavior, they can tweak or remove the corresponding line in the conf file.
The [defaulthat] section lists changehat-aware programs and what hat aa-logprof(1) will collapse the entries to for that program if the
user specifies that the access should be allowed, but should not have it's own hat.
The [globs] section allows modification of the logprof rule engine with respect to globbing suggestions that the user will be prompted
with.
The format of each line is-- "<perl glob> = <apparmor glob>".
When aa-logprof(1) asks about a specific path, if the perl glob matches the path, it replaces the part of the path that matched with the
corresponding apparmor glob and adds it to the list of globbing suggestions.
Lines starting with # are comments and are ignored.
EXAMPLE
[qualifiers]
# things will very likely be painfully broken if bash has it's own profile
/bin/bash = iu
# mount doesn't work if it's confined
/bin/mount = u
# these helper utilities should inherit the parent profile and
# shouldn't have their own profiles
/bin/awk = i
/bin/grep = i
/bin/sed = i
[defaulthat]
/usr/sbin/sshd = EXEC
/usr/sbin/httpd2 = DEFAULT_URI
/usr/sbin/httpd2-prefork = DEFAULT_URI
[globs]
# /foo/bar/lib/libbaz.so -> /foo/bar/lib/lib*
/lib/lib[^/]+so[^/]*$ = /lib/lib*so*
# strip kernel version numbers from kernel module accesses
^/lib/modules/[^/]+/ = /lib/modules/*/
# strip pid numbers from /proc accesses
^/proc/d+/ = /proc/*/
BUGS
If you find any bugs, please report them at <http://https://bugs.launchpad.net/apparmor/+filebug>.
SEE ALSO apparmor(7), apparmor.d(5), aa-enforce(1), aa-complain(1), aa-disable(1), aa_change_hat(2), aa-logprof(1), aa-genprof(1), and
<http://wiki.apparmor.net>.
AppArmor 2.7.103 2012-06-28 LOGPROF.CONF(5)