Replacing last match of substring 21
shell bash
Prabhjot Singh Prabhjot Singh
1 Inspired by [this answer on unix.se](https://unix.stackexchange.com/a/426833), you can sandwich the replacement text between the leading and trailing parts:
Jack Douglas
.bash_history bookmarks 26
shell bash
PeterVandivier PeterVandivier
2 I think [`HISTTIMEFORMAT`](https://www.gnu.org/software/bash/manual/html_node/Bash-Variables.html#index-HISTTIMEFORMAT) is what you are looking for
Jack Douglas
How best to combine `for ... do ... done` routines into a single bash line? 5
shell bash
David David
3 Apropos of very little, I would rewrite your sample code in my own idiosyncratic way. I don't know if it makes it "safer" out of the gate. Almost certainly it doesn't make it "more efficient", but I do think it provides some improvements. If you'll bear with me...
PeterVandivier
2 The literal equivilent on one line would be just seperate with semicolons, but I assume you want stop on error, in which case you can group your commands with curly brackets:
Jack Douglas
Capture output of `time` utility
shell bash
PeterVandivier PeterVandivier
2 As you imply, the [`time` command](https://linux.die.net/man/1/time) outputs the timing info to stderr:
Jack Douglas
Why echo -n does not suppress newline 5
shell bash
Prabhjot Singh Prabhjot Singh
5 As noted in the [`echo` man page](https://linux.die.net/man/1/echo), `-n` suppresses only the final trailing newline
PeterVandivier
Writing a shell script 14
shell bash
निरंजन निरंजन
3 Instead of using password you should be using a ssh key. Refer to [add ssh key to your github account](https://docs.github.com/en/github/authenticating-to-github/adding-a-new-ssh-key-to-your-github-account)
Anonymous 1514
In SSH Local Port Forwarding what DNS server is used to resolve the host (not the ssh gateway)? 3
shell bash
leeand00 leeand00
2 Name resolution for the forwarding happens at the destination end of the tunnel.
Jack Douglas
how can I diff two json files with jq? 114
shell bash jq
PeterVandivier PeterVandivier
2 While I'm not 💯% on the internals of _why_ this works, deferring execution with [`eval`](https://www.unix.com/man-page/posix/1posix/eval/) seems to do the trick.
PeterVandivier
1 You can diff two files in a single command by getting the sorted full paths (including values) for each leaf node:
Jack Douglas
bash expansion with string literal 6
shell bash
PeterVandivier PeterVandivier
2 You don't need to use `eval`, you can use [an array, instead of a simple text variable](https://superuser.com/a/360986):
Jack Douglas
How do you install bash 4 on macOS 4
shell bash macos
PeterVandivier PeterVandivier
4 1. Find the bash formula commit history: https://github.com/Homebrew/homebrew-core/commits/master/Formula/bash.rb
James Douglas
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