Not messing with IFS Not calling external command variable=abc,def,ghij for i in ${variable//,/ } do # call your procedure/other scripts here below echo “$i” done Using bash string manipulation http://www.tldp.org/LDP/abs/html/string-manipulation.html
Actually awk is exactly the tool you should be looking into: ps axu | grep ‘[j]boss’ | awk ‘{print $5}’ or you can ditch the grep altogether since awk knows about regular expressions: ps axu | awk ‘/[j]boss/ {print $5}’ But if, for some bizarre reason, you really can’t use awk, there are other simpler … Read more
You can also use parameter expansion: $ filename=foo.txt $ echo “${filename%.*}” foo Just be aware that if there is no file extension, it will look further back for dots, e.g. If the filename only starts with a dot (e.g. .bashrc) it will remove the whole filename. If there’s a dot only in the path (e.g. … Read more
Since you already know how to cut/yank text, here are a few ideas for pasting it back into another file: Edit the first file, yanking the text you want. Then open your second file from within vi (:e /path/to/other/file) and paste it Open both files together in a split window and navigate between them using … Read more
Try: tr -s ‘ ‘ <text.txt | cut -d ‘ ‘ -f4 From the tr man page: -s, –squeeze-repeats replace each input sequence of a repeated character that is listed in SET1 with a single occurrence of that character
You can use string operators: $ foo=1:2:3:4:5 $ echo ${foo##*:} 5 This trims everything from the front until a ‘:’, greedily. ${foo <– from variable foo ## <– greedy front trim * <– matches anything : <– until the last ‘:’ }
cut -d ‘ ‘ -f 2 Where 2 is the field number of the space-delimited field you want.
You could try something like this: echo ‘maps.google.com’ | rev | cut -d’.’ -f 1 | rev Explanation rev reverses “maps.google.com” to be moc.elgoog.spam cut uses dot (ie ‘.’) as the delimiter, and chooses the first field, which is moc lastly, we reverse it again to get com