Never assume? This works for any string after the = until you hit white space, end of line, comma or semicolon, like ="${boo#*xyz}":
We often assume from small data samples provided here, which is a real bad habit in the real world. In the real world, it is good to do some data checking with as big a data set as possible.
Of course, the requirements are just as terse! That is where active listening comes in!
Is there an easier way to do the following:
echo "|||||||" | sed 's/||/|0|/g; s/||/|0|/g'
which would give the following
|0|0|0|0|0|0|
If it is not run twice it will not pick up the second occurance of the || and leave it empty as in
echo "|||||||" | sed 's/||/|0|/g'
which would give... (3 Replies)
Hello
My file looks like that =>
12.56 have then 7888778.2566 what 44454.54545
878787.66565 if else 4445.54545455
I want to change all '.' on ',' .
I'm trying to do it with sed but I don't know chow to build regular expression to
change 454.4466 on 454,4466 ? (13 Replies)
hi
is it possible to cut this two semicolon separated sed commands
echo "string2 string3 string1" | sed s'/string1//g;s/string2//g'
output: " string3 "
to just one sed command without semicolon?
thanks in advance
funksen (10 Replies)
I have a file
CREATE TABLE DDD_EXT --- 1000
(
val u1
val u1
);
CREATE TABLE dsdasd_EXT --- 1323
(
val u1
val u1
);
CREATE TABLE AAAAAA_EXT --- 1222
(
val u1
val u1
);
CREATE TABLE E_EXT --- 11
(
val u1
val u1 (2 Replies)
I have the following line an in input file I want to digest with sed and simple replace the bold part with a variable defined in my bash script. I can do this in several sed operations but I know there must be a way to do it in a single sed line. What is the syntax?
Line in file:... (1 Reply)
Cheers!
In /etc/syslog.conf, if an error type is not specified, is it logged anywhere (most preferable is it logged to /var/log/messages) or not?
To be more precise I am interested in error and critical level messages. At default these errors are not specified in syslog.conf, and I need to... (6 Replies)
I don't understand this command behavior.
echo "abc" |sed 's/a/&_&/' (4 Replies)
Discussion started by: Vartika18
4 Replies
LEARN ABOUT LINUX
shtool-subst
SHTOOL-SUBST.TMP(1) GNU Portable Shell Tool SHTOOL-SUBST.TMP(1)NAME
shtool-subst - GNU shtool sed(1) substitution operations
SYNOPSIS
shtool subst [-v|--verbose] [-t|--trace] [-n|--nop] [-w|--warning] [-q|--quiet] [-s|--stealth] [-i|--interactive] [-b|--backup ext]
[-e|--exec cmd] [-f|--file cmd-file] [file] [file ...]
DESCRIPTION
This command applies one or more sed(1) substitution operations to stdin or any number of files.
OPTIONS
The following command line options are available.
-v, --verbose
Display some processing information.
-t, --trace
Enable the output of the essential shell commands which are executed.
-n, --nop
No operation mode. Actual execution of the essential shell commands which would be executed is suppressed.
-w, --warning
Show warning on substitution operation resulting in no content change on every file. The default is to show a warning on substitution
operations resulted in no content change on all files.
-q, --quiet
Suppress warning on substitution operation resulting in no content change.
-s, --stealth
Stealth operation. Preserve timestamp on file.
-i, --interactive
Enter interactive mode where the user has to approve each operation.
-b, --backup ext
Preserve backup of original file using file name extension ext. Default is to overwrite the original file.
-e, --exec cmd
Specify sed(1) command directly.
-f, --file cmd-file
Read sed(1) command from file.
EXAMPLE
# shell script
shtool subst -i -e 's;(c) ([0-9]*)-2000;(c) 1-2001;' *.[ch]
# RPM spec-file
%install
shtool subst -v -n
-e 's;^(prefix=).*;1 $RPM_BUILD_ROOT%{_prefix};g'
-e 's;^(sysconfdir=).*;1 $RPM_BUILD_ROOT%{_prefix}/etc;g'
`find . -name Makefile -print`
make install
HISTORY
The GNU shtool subst command was originally written by Ralf S. Engelschall <rse@engelschall.com> in 2001 for GNU shtool. It was prompted
by the need to have a uniform and convenient patching frontend to sed(1) operations in the OpenPKG package specifications.
SEE ALSO shtool(1), sed(1).
18-Jul-2008 shtool 2.0.8 SHTOOL-SUBST.TMP(1)