tr

This is really self explanatory. I'm working in a bash shell and I'm really new to shell scripting. I've found a lot of information about using tr and sed but all the examples I have found so far are removing delimiters and new lines. I really want to do the opposite of that. I want to be able to separate based on a blank space. I have a string like "abcd efgh" and I need it to be "abcd" "efgh" (all without quotes, just to show groupings). I'm sure this is much simpler than I'm making it, but I'm very confused. Updated Question: I have a column of PIDs that I have put into an array, but each

I need to remove a line containing "not a dynamic executable" and a previous line from a stream using grep, awk, sed or something other. My current working solution would be to tr the entire stream to strip off newlines then replace the newline preceding my match with something else using sed then use tr to add the newlines back in and then use grep -v. I'm somewhat weary of artifacts with this approach, but I don't see how else I can to it at the moment: tr '\n' '|' | sed 's/|\tnot a dynamic executable/__MY_REMOVE/g' | tr '|' '\n' EDIT: Input is a list of mixed files piped to xargs ldd,

I have multiple .txt files containing text in an alphabet; I want to transliterate the text into an other alphabet; some characters of alphabet1 are 1:1 with those of alphabet2 (i.e. a becomes e ), whereas others are 1:2 (i.e. x becomes ch ). I would like to do this using a simple script for the Linux shell. With tr or sed I can convert 1:1 characters: sed -f y/abcdefghijklmnopqrstuvwxyz/nopqrstuvwxyzabcdefghijklm/ a will become n , b will become o et cetera (a Caesar's cipher, I think) But how can I deal with 1:2 characters? Not an answer, just to show a briefer, idiomatic way to populate the

My objective is to match email addresses that belong to the Yahoo! family of domains. In *nix systems (I will be using Ubuntu), what are the benefits and drawbacks to any one of these methods for matching the pattern? And if there is another, more elegant solution that I haven't been capable of imagining, please share. Here they are: Use grep with option -i : grep -Ei "@(yahoo|(y|rocket)mail|geocities)\.com" Translate characters to all upper case or lower case then grep : tr [:upper:] [:lower:] < /path/to/file.txt | grep -E "@(yahoo|(y|rocket)mail|geocities)\.com" Include a character set for

I would like to remove all of the empty lines from a file, but only when they are at the end/start of a file (that is, if there are no non-empty lines before them, at the start; and if there are no non-empty lines after them, at the end.) Is this possible outside of a fully-featured scripting language like Perl or Ruby? I’d prefer to do this with sed or awk if possible. Basically, any light-weight and widely available UNIX-y tool would be fine, especially one I can learn more about quickly (Perl, thus, not included.) From Useful one-line scripts for sed : # Delete all leading blank lines at