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I have data of the following form:
num1 This is a string
num2 This is another string
I want to limit length of all strings which are after the first tab..such that length(string)<4. Therefore, the output which I get is:
num1 This is a string
num2 This is another
I can do this using python. But I am trying to find a linux equivalent in order to achieve the same.
749
To cut by character use the -c option. This selects the characters given to the -c option. This can be a list of comma separated numbers, a range of numbers or a single number. Where your input stream is character based -c can be a better option than selecting by bytes as often characters are more than one byte.
Example-2: Trim string data using `sed` commandUse sed 's/^ *//g', to remove the leading white spaces. There is another way to remove whitespaces using `sed` command. The following commands removed the spaces from the variable, $Var by using `sed` command and [[:space:]]. $ echo "$Var are very popular now."
We can use the # operator to get the length of the string in BASH, we need to enclose the variable name enclosed in “{ }” and inside of that, we use the # to get the length of the string variable. Thus, using the “#” operator in BASH, we can get the length of the string variable.
The maximum line length is 4096 chars (including the terminating newline character); lines longer than 4096 chars are truncated. After 4095 characters, input processing (e.g., ISIG and ECHO* processing) continues, but any input data after 4095 characters up to (but not including) any terminating newline is discarded.
In bash, you can use the following to limit the string, in this case, from index 0 to index 17.
$ var="this is a another string"
$ echo ${var:0:17}
this is a another
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