Use $(commands) instead: $ echo “hello1-$(echo hello2-$(echo hello3-$(echo hello4)))” hello1-hello2-hello3-hello4 $(commands) does the same thing as backticks, but you can nest them. You may also be interested in Bash range expansions: echo hello{1..10} hello1 hello2 hello3 hello4 hello5 hello6 hello7 hello8 hello9 hello10
In all of the cases above, the variable is correctly set, but not correctly read! The right way is to use double quotes when referencing: echo “$var” This gives the expected value in all the examples given. Always quote variable references! Why? When a variable is unquoted, it will: Undergo field splitting where the value … Read more
You are better off using a program like jq to generate the JSON, if you don’t know ahead of time if the contents of the variables are properly escaped for inclusion in JSON. Otherwise, you will just end up with invalid JSON for your trouble. BUCKET_NAME=testbucket OBJECT_NAME=testworkflow-2.0.1.jar TARGET_LOCATION=/opt/test/testworkflow-2.0.1.jar JSON_STRING=$( jq -n \ –arg bn “$BUCKET_NAME” … Read more
surround.vim is going to be your easiest answer. If you are truly set against using it, here are some examples for what you can do. Not necessarily the most efficient, but that’s why surround.vim was written. Quote a word, using single quotes ciw’Ctrl+r”‘ ciw – Delete the word the cursor is on, and end up … Read more
If you really want to use single quotes in the outermost layer, remember that you can glue both kinds of quotation. Example: alias rxvt=”urxvt -fg “”‘”‘#111111′”‘”‘ -bg ‘”‘”‘#111111′”‘” # ^^^^^ ^^^^^ ^^^^^ ^^^^ # 12345 12345 12345 1234 Explanation of how ‘”‘”‘ is interpreted as just ‘: ‘ End first quotation which uses single quotes. … Read more