Linux – 7z “is not supported archive” while updating an archive

backupcompressionincremental-backuplinux

7za u -pPasswored -mhe=on -r -m0=lzma -mx=9 -mfb=64 -md=32m '-x!temp' filename.7z  /home/software

While updating the archive we are getting this error:

Error: XXXXXXX.7z is not supported archive

System error:
Operation not permitted

Best Answer

When filename.7z is exist and not a valid 7-zip file, you will get this error.

Case 1: filename.7z is a empty file.

$ ls -l
-rw-rw-r-- 1 chenyang chenyang  0 Jun 11 23:19 empty.7z
$ 7za a empty.7z /tmp/test2/*
Error: empty.7z is not supported archive

Case 2: filename.7z is a text file (not empty).

$ cat text.7z
NOT_VALID
$ 7za a text.7z /tmp/test2/*
Error: text.7z is not supported archive
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