Add useful bash variables TIL

1 files changed, 88 insertions, 0 deletions

diff --git a/locale/fr/LC_MESSAGES/_tils/2020-11-12-useful-bash-variables.po b/locale/fr/LC_MESSAGES/_tils/2020-11-12-useful-bash-variables.po
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+++ b/locale/fr/LC_MESSAGES/_tils/2020-11-12-useful-bash-variables.po
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+#
+msgid ""
+msgstr ""
+
+msgid "title: Useful Bash variables"
+msgstr ""
+
+msgid "date: 2020-11-12"
+msgstr ""
+
+msgid "layout: post"
+msgstr ""
+
+msgid "lang: en"
+msgstr ""
+
+msgid "ref: useful-bash-variables"
+msgstr ""
+
+msgid ""
+"[GNU Bash](https://www.gnu.org/software/bash/) has a few two letter "
+"variables that may be useful when typing on the terminal."
+msgstr ""
+
+msgid "`!!`: the text of the last command"
+msgstr ""
+
+msgid ""
+"The [`!!` "
+"variable](https://www.gnu.org/software/bash/manual/bash.html#Event-"
+"Designators) refers to the previous command, and I find useful when "
+"following chains for symlinks:"
+msgstr ""
+
+msgid ""
+"$ which git\n"
+"/run/current-system/sw/bin/git\n"
+"$ readlink $(!!)\n"
+"readlink $(which git)\n"
+"/nix/store/5bgr1xpm4m0r72h9049jbbhagxdyrnyb-git-2.28.0/bin/git\n"
+msgstr ""
+
+msgid ""
+"It is also useful when you forget to prefix `sudo` to a command that "
+"requires it:"
+msgstr ""
+
+msgid ""
+"$ requires-sudo.sh\n"
+"requires-sudo.sh: Permission denied\n"
+"$ sudo !!\n"
+"sudo ./requires-sudo.sh\n"
+"# all good\n"
+msgstr ""
+
+msgid ""
+"Bash prints the command expansion before executing it, so it is better for "
+"you to follow along what it is doing."
+msgstr ""
+
+msgid "`$_`: most recent parameter"
+msgstr ""
+
+msgid ""
+"The [`$_` "
+"variable](https://www.gnu.org/software/bash/manual/bash.html#Special-"
+"Parameters) will give you the most recent parameter you provided to a "
+"previous argument, which can save you typing sometimes:"
+msgstr ""
+
+msgid ""
+"# instead of...\n"
+"$ mkdir -p a/b/c/d/\n"
+"$ cd a/b/c/d/\n"
+"\n"
+"# ...you can:\n"
+"$ mkdir -p a/b/c/d/\n"
+"$ cd $_\n"
+msgstr ""
+
+msgid "Conclusion"
+msgstr ""
+
+msgid ""
+"I wouldn't use those in a script, as it would make the script terser to "
+"read, I find those useful shortcut that are handy when writing at the "
+"interactive terminal."
+msgstr ""