REST API で Confluence Cloud の総ページ数を知る ref: https://qiita.com/ymkjp/items/43651c1d9a60fc8ca48c

count_pages_by_space.sh

A_USER="admin"
A_PASSWD="__YOUR_PASSWORD_HERE__"
INSTANCE_HOST="__YOUR_SUBDOMAIN_HERE__.atlassian.net"
SPACE_LIMIT="1000"

function space_keys {
  curl -sGLu ${A_USER}:${A_PASSWD} "https://${INSTANCE_HOST}/wiki/rest/api/space"  --data-urlencode "limit=${SPACE_LIMIT}" | jq -r '.results[].key'
}

function page_num_by_space {
  for SPACE in $(space_keys); do
    NUM_PAGES=$(curl -sGLu ${A_USER}:${A_PASSWD} "https://${INSTANCE_HOST}/wiki/rest/api/search" --data-urlencode "cql=type IN (blogpost, page) AND space='${SPACE}'" --data-urlencode 'limit=0' | jq '.totalSize')
    echo "${SPACE}\t${NUM_PAGES}"
  done
}

page_num_by_space | sort -rk2

example.sh

# Be sure that a user has a privilege to access all the Confluence spaces
A_USER="admin"
A_PASSWD="__YOUR_PASSWORD_HERE__"
INSTANCE_HOST="__YOUR_SUBDOMAIN_HERE__.atlassian.net"

# Total number of pages
curl -sGLu ${A_USER}:${A_PASSWD} "https://${INSTANCE_HOST}/wiki/rest/api/search" --data-urlencode 'cql=type IN (blogpost, page)' --data-urlencode 'limit=0' | jq '.totalSize'

# Total number of users
curl -sLu ${A_USER}:${A_PASSWD} "https://${INSTANCE_HOST}/wiki/rest/api/group/confluence-users/member?limit=1000" | jq '.size'

# Number of spaces (Assumed to be less than 1000)
curl -sLu ${A_USER}:${A_PASSWD} "https://${INSTANCE_HOST}/wiki/rest/api/space?limit=1000" | jq '.size'

file2.txt

DEF     5
BIJP    2
~admin  1

STDOUT.tsv

DEF     5
BIJP    2
~admin  1