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Bash builtin to quick substitute a string in the previous command and run the result. Equivalent to !!:s^string1^string2. More information: https://www.gnu.org/software/bash/manual/bash.html#Event-Designators.

• Run the previous command replacing string1 with string2:

^{{string1}}^{{string2}}

• Remove string1 from the previous command:

^{{string1}}^

• Replace string1 with string2 in the previous command and add string3 to its end:

^{{string1}}^{{string2}}^{{string3}}