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+# is_installed
+
+Search installed packages on Slackware (and derivatives), and find which
+package contains a given file. Reads the package database in
+`/var/log/packages`.
+
+## Usage
+
+```
+is_installed <item> # search package names for <item>
+is_installed file-search <item> # search file contents of every package for <item>
+is_installed info <item> # less the matching package manifest
+is_installed help # show help
+```
+
+## Install
+
+```
+install -m 0755 is_installed /usr/local/bin/is_installed
+install -m 0644 is_installed.bash-completion \
+ /usr/share/bash-completion/completions/is_installed
+```
+
+## License
+
+GPLv2. See [LICENSE](LICENSE).
+
+Copyright (C) 2026 Danilo M. <danix@danix.xyz>