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How do you read a complete line in for loops with spaces?
for loop splits when it sees any whitespace like space, tab, or newline. So, you should use IFS (Internal Field Separator): IFS=$’\n’ # make newlines the only separator for j in $(cat ./file_wget_med) do echo “$j” done # Note: IFS needs to be reset to default!
How do you read a string with spaces in shell script?
Solution: use double-quotes whenever you refer to a variable (e.g. echo “$input” ). Second, read will trim leading and trailing whitespace (i.e. spaces at the beginning and/or end of the input). If you care about this, use IFS= read (this essentially wipes out its definition of whitespace, so nothing gets trimmed).
How do I iterate over a file in bash?
The syntax to loop through each file individually in a loop is: create a variable (f for file, for example). Then define the data set you want the variable to cycle through. In this case, cycle through all files in the current directory using the * wildcard character (the * wildcard matches everything).
Is it OK to have spaces in filenames?
Don’t start or end your filename with a space, period, hyphen, or underline. Keep your filenames to a reasonable length and be sure they are under 31 characters. Most operating systems are case sensitive; always use lowercase. Avoid using spaces and underscores; use a hyphen instead.
How to read complete line in’for’loop with spaces?
for loops split on any whitespace (space, tab, newline) by default; the easiest way to work on one line at a time is to use a while read loop instead, which splits on newlines: I would expect your command to spit out one word per line (that’s what happened when I tested it out with a file of my own).
How to loop over the lines of a file?
There, empty lines are preserved, but note that it would skip the last line if it was not properly delimited by a newline character. For what it is worth, I need to do that quite often, and can never remember the exact way of using while IFS= read…, so I defined the following function in my bash profile:
Can a file have spaces but not newlines?
1 @CarloWood – file names can include newlines, so your question is rather unique: looping over a list of filenames that can contain spaces but not newlines. I think you’re going to have to use the IFS technique, to indicate that the break occurs at ‘ ‘– DiagonNov 28 ’18 at 5:52
Why does Bash split files with spaces in names?
By default, the shell splits the output of a command on spaces, tabs, and newlines Filenames could contain wildcard characters which would get expanded What if there is a directory whose name ends in *.csv?