Bourne to Bourne Again Shell Forward Compatibility

30. Mai 2025 in GNU/Linux, Programming.

Introduction In this article i try to find out, if Bourne Shell scripts are runnable in Bourne Again Shell without modification. If not, i advice on how to modify the code so that it runs on both Shells. An interpreter for some variant of Bourne Shell is available as an executable /bin/sh on most Linux […]

Comparing Distinguished LDAP Names

6. August 2020 in Administration, GNU/Linux, Programming.

In a Bourne Shell script, a distinguished name (DN) for performing an LDAP-query is held in a variable: dn=”cn=Malmø,ou=County Capitals,dc=Sweden,dc=Europe” For the purpose of demonstration, this example DN contains a non-ASCII character. Let’s write a Bourne Shell function that escapes such special characters as requested by RFC 4514 using perl’s Net::LDAP::Util: canonical_dn() { perl -s […]