gzip status progress shell script with Pipe Viewer

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Source URL 1 of 2:
http://stackoverflow.com/questions/238073/how-to-add-a-progress-bar-to-a-shell-script

$ bar file1 | wc -l 
$ pv file1 | wc -l

$ tail -n 100 file1 | bar | wc -l
$ tail -n 100 file1 | pv | wc -l

$ copy <(bar file1) file2
$ copy <(pv file1) file2

bar --in-file /dev/rmt/1cbn --out-file \
     tape-restore.tar --size 2.4g --buffer-size 64k




Source URL 2 of 2:
http://stackoverflow.com/questions/19598797/is-there-any-way-to-show-progress-on-a-gunzip-database-sql-gz-mysql-pr

$ pv database1.sql.gz | gunzip | mysql -u root -p database1

$ pv database1.sql.gz | gunzip | mysql -uroot -p database1
  593MiB 1:00:33 [ 225kiB/s] [====================>              ] 58% ETA 0:42:25

mysqldump -uroot -p database1 | pv | gzip -9 > database1.sql.gz