List files that do not begin with a specific prefix

lswildcards

I need to list only the files in a directory that do NOT begin with qc_dl, qc_dt or qd_df, but that also DO end in .sas.

I can list the files that do not begin with "qc_dl" as such:

ls -I "qc_dl*"

But then I do not know how to only select the SAS programs from the resultant list.

Furthermore, I can select all SAS files that begin either with "qc_dl", "qc_dt" or "qd_df", as follows:

ls qc_d{l,t,f}*.sas

However, I cannot combine the two commands to only list SAS files that DO NOT begin with qc_dl/t/f.

Assuming file names don't contain newline characters and don't start with ., this should work:

ls -d -- *.sas | grep -v '^qc_d[ltf]'

List files ending in .sas and filtering all that is NOT qc_dl, qc_dt, qc_df

For any filtering needs, grep is your friend.

With zsh and Glob Qualifiers you can easily express it directly, e.g:

echo *(.)

will either only return the list of regular files or an error depending on your configuration.

For the non-directories:

echo *(^/)

(will include symlinks (including to directories), named pipes, devices, sockets, doors...)

echo *(-.)

for regular files and symlinks to regular files.

echo *(-^/)

for non-directories and no symlinks to directories either.

Also, see the D globbing qualifier if you want to include Dot files (hidden files), like *(D-.).

Since you want .in to be paired with .out, loop through only *.in and check if there is a corresponding .out file, if so, print out both:

for f in *.in; do
  if [[ -f ${f%.in}.out ]]; then
    echo $f
    echo ${f%.in}.out
  fi
done