The ls in backticks is Useless. The sed and echo can be replaced with a variable substitution. Variables should be double-quoted although it doesn't really matter in this case if the example file names are representative.
The expression ${var#subst} evaluates to the value of $var with the prefix subst removed (if matched). There are other similar operations for suffix substitution etc; see the shell's manual page or a tutorial for details.
Last edited by era; 09-25-2008 at 01:45 AM..
Reason: Attempt to explain ${var#subst}
Hello,
Today, as a root user, i want to copy recursively all files and diretories in a source directory to a destination directory using the following command,
cp -r /home/smith/* /home/bob/
However, I carelessly missed the '*' out when I executed the command.
Now, i noticed a... (1 Reply)
Hi Gurus,
I had a question regarding avoiding duplicates.i have a file abc.txt
abc.txt
-------
READER_1_1_1> HIER_28056 XML Reader: Error occurred while parsing:; line number ; column number
READER_1_3_1> Sun Mar 23 23:52:48 2008
READER_1_3_1> HIER_28056 XML Reader: Error occurred while... (0 Replies)
I searched the forum, but there was different type of rename.
Hello.
I have files in folder.
Like:
xxxxxxxx1.html
or
xxxxxxxx2.txt
or
xxxxxxxx3.tar.gz
and how to rename or change file extension case to
xxxxxxxx1.htm
or
xxxxxxx2.TXT
or (5 Replies)
Hello guys,
I was looking for a shell script that removes all the special characters from the files and the subdirectories recursively. I could not locate it any more. Dose any body have a similar script that dose that?
Thanks for the help.
AV (0 Replies)
I made menu script for users so they can run other script without going in shell just from menu.
But i must control their input.
These are criteria:
Input must have 4 signs
First two signs are always lower case letters
Input shall not have some special signs just letters and numbers
... (1 Reply)
Hi. Let me start saying that i am kinda new to bash, and have few skills in programming. I've been advised to use bash to manipulate large .csv files. I've been able to do some data filtering using fors, grep and tail commands. That was kinda easy seeing examples. But now i need to do some hard... (1 Reply)
HI ! all
till date I usually rename file like this
n=201108290000
for file in *.nc; do
file_name=M.m.1.1.1.$n.ready
n=$(( $n+1 ))
mv $file $file_name
donebut in this case I have to rename file depending on basename of file, when I list files results like this, if there is leap... (6 Replies)
I have a special case that awk could be used but I do not have the skill. Trying to create a final output file (indel_parse.txt) that is created from using some information from each of the two files (attached).
parse rules:
The header is skipped FNR>1
1. 4 zeros after the NC_ (not... (2 Replies)
In the bash menu below if the variant that is inputted is in the format NM_004004.3:c.274G>T the below works perfectly. My question is if the variant inputted isNM_004004.3:-c.274G>T or NM_004004.3:+c.274G>T then the code as is will throw an error due to a biological issue. Is it possible to to... (1 Reply)
I am trying to rename files with spaces and other characters and not able to be successful.
FileNames:
UPLOAD REFERENCE.xls
UPLOAD MASS REFERENCE.XLS
find /UPLOAD REFERENCE/ -depth -type f -name "* *" -exec rename " " "_" "{}" ";"
The above one is successful to replace spaces... (1 Reply)
Discussion started by: eskay
1 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)