Modify config file using bash script

by

A wild stab in the dark for modifying a single value:

sed -c -i "s/\($TARGET_KEY *= *\).*/\1$REPLACEMENT_VALUE/" $CONFIG_FILE

assuming that the target key and replacement value don’t contain any special regex characters, and that your key-value separator is “=”. Note, the -c option is system dependent and you may need to omit it for sed to execute.

For other tips on how to do similar replacements (e.g., when the REPLACEMENT_VALUE has “https://stackoverflow.com/” characters in it), there are some great examples here.

Related Contents:

  1. How can I reference a file for variables using Bash?
  2. echo that outputs to stderr
  3. What is the preferred Bash shebang?
  4. YYYY-MM-DD format date in shell script
  5. Listing only directories using ls in Bash?
  6. How to echo shell commands as they are executed
  7. Bash script and /bin/bash^M: bad interpreter: No such file or directory [duplicate]
  8. Can bash show a function’s definition?
  9. Getting the parent of a directory in Bash
  10. How to check if running in Cygwin, Mac or Linux?
  11. bash assign default value
  12. How to run two commands with sudo?
  13. With bash, how can I pipe standard error into another process?
  14. How can I check the size of a file using Bash?
  15. Count occurrences of a char in a string using Bash
  16. How can I assign the output of a function to a variable using bash?
  17. How does this bash fork bomb work? [duplicate]
  18. Command to escape a string in bash
  19. How execute bash script line by line?
  20. HMAC-SHA1 in bash
  21. Bash command line and input limit
  22. Shell script read missing last line
  23. Is there a way to create key-value pairs in Bash script?
  24. Are shell scripts sensitive to encoding and line endings?
  25. Unix shell script to truncate a large file
  26. Is mixing getopts with positional parameters possible?
  27. How do I test (in one line) if command output contains a certain string?
  28. Check if array is empty in Bash
  29. What command prints a string as “big ascii text art” in bash? [closed]
  30. How to output a list of changed files from rsync?
  31. Can’t run AWS CLI from CRON (credentials)
  32. How to find all file extensions recursively from a directory?
  33. bash, Linux: Set difference between two text files
  34. LINES and COLUMNS environmental variables lost in a script
  35. How to get ip address of a server on Centos 7 in bash
  36. How to calculate the log of a number using bc?
  37. Is there an easy way to pass a “raw” string to grep?
  38. The way to distinguish command-mode and insert-mode in Bash’s Vi command line editing
  39. What is the difference between operator “=” and “==” in Bash?
  40. Using if elif fi in shell scripts [duplicate]
  41. Pass command line arguments via sbatch
  42. Grab the filename in Unix out of full path
  43. How to make case statement match a number range?
  44. Setting environment variable for one program call in bash using env
  45. Check whether one number equals another number in Bash
  46. How do I “read” a variable on a while loop
  47. accessing ERRORLEVEL from bash script
  48. How to get bc to handle numbers in scientific (aka exponential) notation?
  49. Using SED with wildcard
  50. how to write a process-pool bash shell

Leave a Comment