Hosting Operations
Read-only, can be slowShow Enabled Apache Sites
You need to see which Apache virtual host files are enabled.
Command
find /etc/apache2/sites-enabled -maxdepth 1 -type l -printf '%f -> %l\n' 2>/dev/null | sortBefore you run this
System impact: Read-only. Can create load on large logs, directories, filesystems, or process tables.
When not to use it: Do not remove or create symlinks from this output unless you intend to enable or disable a site.
Expected output
Enabled Apache site filenames and their symlink targets.
System impact
Read-only, can be slow. Nothing changes. The command lists enabled Apache site symlinks.
May require elevated permissions on protected paths or service-owned files.
Scope this to the smallest useful path or service on busy systems.
Recovery / rollback: no state is changed.
When to use it
Use when Apache ignores a virtual host file you edited.
When not to use it
Do not remove or create symlinks from this output unless you intend to enable or disable a site.
next steps
Related commands
List Enabled Apache Sites
Apache may not be using the vhost file you edited.
find /etc/apache2/sites-enabled -maxdepth 1 -type l -printf '%f -> %l
' 2>/dev/null | sort
Find System Cron Files Fast
A job can be nowhere in your crontab and still run every night.
find /etc/cron.d /etc/cron.hourly /etc/cron.daily /etc/cron.weekly /etc/cron.monthly -maxdepth 1 -type f -print 2>/dev/null | sort
Exclude the Current Release from Cleanup
Release cleanup should prove what current points to before listing old directories.
current=$(readlink -f /home/deploy/current); find /home/deploy/releases -mindepth 1 -maxdepth 1 -type d ! -samefile "$current" -printf '%TY-%Tm-%Td %p\n' 2>/dev/null | sort
Group Writable Files by Owning Group
Group-writable files are not automatically wrong, but the owning group decides the risk.
find /srv/www/example -type f -perm -0020 -printf '%g %M %p\n' 2>/dev/null | sort
Find Directories Burning Inodes
Inode cleanup starts by finding the directory with too many files.
find /var/cache -xdev -type f -printf '%h\n' 2>/dev/null | sort | uniq -c | sort -nr | head
Study mapping
Use this as independent command practice: read the notes, predict the output, then compare it with the example before using a real shell.
Independent study support only. No affiliation, endorsement, exam dumps, or real exam questions.