How to gzip a file [closed] - linux

Question

Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.
This question does not appear to be about a specific programming problem, a software algorithm, or software tools primarily used by programmers. If you believe the question would be on-topic on another Stack Exchange site, you can leave a comment to explain where the question may be able to be answered.
Closed 6 years ago.
Improve this question
How can I gzip this file? I get an error:
find /users/tnea01/logfile10.log -type f -exec sh -c \ 'gunzip /users/tnea01/logfile_archive/$(basename $0)_$(date -r {} +%F).gz $0' {} \;
Here is the error I get:
gzip: /users/tnea01/logfile10.tar.gz: No such file or directory gzip: /users/tnea01/logfile10.log: unknown suffix -- ignored

Answer 1

If you didn't know the exact filename, you might do something like this:
find /users/tnea01 -maxdepth 1 -name '*.log' -type f -exec sh -c \
'for f; do
gzip -c <"$f" >"/users/tnea01/logfile_archive/${f##*/}_$(date -r "$f" +%F).gz"
done' _ {} +
To explain the moving pieces:
The only secure way to use sh -c is with a completely constant string; substituting variables into it (including filenames) creates security vulnerabilities. Thus, we don't use any kind of replacement facility in the code, but pass the filename(s) as extra arguments.
for f; do is the same as for f in "$#"; do -- it iterates over all command line arguments.
${f**#/} evaluates to everything after the last / in $f; see the bash-hackers page on parameter expansion.
Expansions, including $(date ...), need to be inside a double-quoted context to be safe; here, we're putting the entire destination filename in such quotes.
However, since you do, that's all entirely needless.
f=/users/tnea01/logfile10.log
d=/users/tnea01/logfile_archive
gzip -c <"$f" >"$d/${f##*/}_$(date -r "$f" +%F).gz"