Visit Our UNIX and Linux User Community

How to find no of underscores in a variable?

Thread Tools Search this Thread
Top Forums Shell Programming and Scripting How to find no of underscores in a variable?
# 8  
Old 09-13-2013
The discussion in this thread is a continuation of the discussion in the thread No. of underscores in a file name and was already answered there.

Previous Thread | Next Thread
Test Your Knowledge in Computers #184
Difficulty: Easy
Less than 4% of those surveyed at indicated that csh was their most useful shell.
True or False?

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Replace spaces with underscores up to first comma but not after the comma

I have a comma delimited file of major codes and descriptions. I want to replace all occurrences of spaces with underscores up to the first comma (only in the first field), but not replace spaces following the comma. For instance I have the following snippet of the file: EK ED,Elementary and... (7 Replies)
Discussion started by: tdouty
7 Replies

2. Shell Programming and Scripting

How to separate data with varying amounts of underscores?

All, I've searched and haven't found a solution for my particular issue. I have a file with lines of data that contain varying amounts of underscores imbedded. But all the strings have a final underscore and an interface name: dmk_hcn_dalian2.XXXX.XXX.XX.COM_Se0/0/0... (4 Replies)
Discussion started by: turk22
4 Replies

3. UNIX for Dummies Questions & Answers

Appending "_" (underscores) to variable names

Hello, I have a file, inputs.list that contain prefixes to files that are inputs for a program inputs.list A B C D E ... My files are of the format A_1, A_2, B_1, B_2 and so on. I am planning to run a shell script that takes each line from the above file and feed it to the (3 Replies)
Discussion started by: Gussifinknottle
3 Replies

4. Shell Programming and Scripting

No. of underscores in a file name

Hi I want to filter my files which has more than 1 underscores in can i achieve this. Ex: if my file name is a_b_c, a_b. my command should result only a_b_c Thanks Pracheth (10 Replies)
Discussion started by: pracheth
10 Replies

5. Shell Programming and Scripting

Find string in variable

korn shell, testing if a pattern exist in a string, x is constant, y could be none,all or any combination of the elements of x, x="aa bb cc dd ee ff gg hh ii jj kk ll" y="ff kk" for z in `echo ${x}` do if <any pattern in $y matches any pattern in $x> ] then do something fi... (3 Replies)
Discussion started by: squrcles
3 Replies

6. Shell Programming and Scripting

extract string from file name between two underscores

Hi, Here is my question, I need to extract string between two underscores from the filename for example, filename is what I want to extract is 300x300. There are many such files in my directory, so I guess the code should be like: for file... (7 Replies)
Discussion started by: 1988PF
7 Replies

7. Shell Programming and Scripting

Scripting to convert underscores to spaces

Greetings, I have a bunch of music files that I want to strip the underscores out, and leave only spaces. All that I've found on the web is how to add underscores to files that have spaces, and reversing the "tr" command does not make a difference. Here is how to convert spaces to... (6 Replies)
Discussion started by: brakeb
6 Replies

8. Shell Programming and Scripting

find and replace variable

Is there an easy way of doing this cat file1 jkasjhjgfg LTRIM(RTRIM(aa_bb_cde)) aragsfdg LTRIM(RTRIM(aa_bb_cde)) aregfafdgfg sdgsfdagdfg gadfg eafgsadgsa asdgsfdgag LTRIM(RTRIM(aa_bb_cde)) rfghsdfhd I want to replace each occurence of LTRIM(RTRIM($x)) with LENGTH(LTRIM(RTRIM($x)))=0... (4 Replies)
Discussion started by: alfredo123
4 Replies

9. UNIX for Advanced & Expert Users

Find a environment variable Value !

There is shell script which contains some variables . These variables are used , but they have not declared in the script. I think its a environment variable, so I want to know where these variables are set and given values In .profile or .login..or where to c Please give the full path and... (1 Reply)
Discussion started by: tkbharani
1 Replies

10. UNIX for Dummies Questions & Answers

change spaces to underscores script !!!

Hi everybody! Im not good in scripting and I need a script to take all the files with spaces in their names and change it to underscores. alice cooper.mp3 >> alice_cooper.mp3 Thanks in advance. (2 Replies)
Discussion started by: piltrafa
2 Replies
read(1) 						      General Commands Manual							   read(1)

read - read a line from standard input SYNOPSIS
reads a single line from standard input. The line is split into fields as when processed by the shell (refer to shells in the first field is assigned to the first variable var, the second field to the second variable var, and so forth. If there are more fields than there are specified var operands, the remaining fields and their intervening separators are assigned to the last var. If there are more vars than fields, the remaining vars are set to empty strings. The setting of variables specified by the var operands affect the current shell execution environment. Standard input to can be redirected from a text file. Since affects the current shell execution environment, it is usually provided as a normal shell special (built-in) command. Thus, if it is called in a subshell or separate utility execution environment similar to the following, it does not affect the shell variables in the caller's environment: Options recognizes the following options: Do not treat a backslash character in any special way. Consider each backslash to be part of the input line. Opperands recognizes the following operands: var The name of an existing or nonexisting shell variable. EXTERNAL INFLUENCES
Environment Variables determines the internal field separators used to delimit fields. RETURN VALUE
exits with one of the following values: 0 Successful completion. >0 End-of-file was detected or an error occurred. EXAMPLES
Print a file with the first field of each line moved to the end of the line. while read -r xx yy do printf "%s %s " "$yy" "$xx" done < input_file SEE ALSO
csh(1), ksh(1), sh(1), sh-posix(1). STANDARDS CONFORMANCE

Featured Tech Videos