I need to replace a word in line or URL but I need to do it from command line/terminal.

I mean

$ ./myscript.sh xxx.xxx.xxx.xxx:8080/code -c code1 -t query

Now from there, without going back, I need to replace code1 with mycode or some other string.

  • Why do you need it? – choroba Nov 16 '15 at 13:44
  • may the url contain other b ? – lese Nov 16 '15 at 13:44
  • Can you please clarify how you get the initial string in input. From your post it seems it is on your terminal likewise you typed it as a command – lese Nov 16 '15 at 14:03
  • Raja... a variation of echo http://xxx.xxx.xxx.xxx/a/b/b/c/d/e | sed 's/b/c/g'? Please tell what do you want to do, execute a command,call a program that will reach that url, change a variable value...?!? – Hastur Nov 16 '15 at 14:15

I renamed your script, but here's an option:

$ ./myscript.sh xxx.xxx.xxx.xxx:8080/code -c code1 -t query

after executing the script, use:

$ ^code1^code2

... which results in:

./myscript.sh xxx.xxx.xxx.xxx:8080/code -c code2 -t query

man bash and search for "Event Designators":


Quick substitution. Repeat the last command, replacing string1 with string2. Equivalent to !!:s/string1/string2/

Editing to add global replacement, which I learned just now from @slm's answer at https://unix.stackexchange.com/a/116626/117549:

$ !!:gs/string1/string2

which says:

!! - recall the last command
g - perform the substitution over the whole line
s/string1/string2 - replace string1 with string2
  • Hi , I have been through some case. Here it is.` mv /server/logfile1 /nfs/logs/ && gzip /nfs/logs/logfile1 & ` and after that I did ^logfile1^logfile2 but changes applied at only 1st match but not globally at gzip place. Please help. Thank you. – rɑːdʒɑ Nov 20 '15 at 14:12
  • @Raja I have updated the answer with global search & replace – Jeff Schaller Nov 20 '15 at 17:52
  • 2
    Of course you use !! to repeat the previous command in its entirety, unaltered, but almost anything that begins with !!: can be shortened to !:; e.g., !:gs/string1/string2. – G-Man Jan 21 '16 at 19:48
  • 2
    The ^ syntax works in zsh as well. Just documenting for posterity. – Kevin Suttle Jun 23 '17 at 19:24
  • 2
    ^foo^bar^:G for global search and replace. – HappyFace Sep 3 '18 at 10:48

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