5 ms·

$ apropos space CORE (3perl) - Namespace for Perl's core routines arpd (8) - userspace arp daemon. CMSG_SPACE (3) - access

$ apropos space CORE (3perl) - Namespace for Perl's core routines arpd (8) - userspace arp daemon. CMSG_SPACE (3) - access ancillary data CUDA_ERROR_INVALID_ADDRESS_SPACE (3) - (unknown subject) cudaErrorInvalidAddressSpace (3) - (unknown subject) df (1) - report file system disk space usage

Jaruzel 8y ago
Thank you, you just re-enforced my point; I've been using Linux seriously for about a year now, and I didn't know about 'apropos'. Bash never mentioned it whenever I got stuck, and my learning travels on the internet has never referenced it.
- jandrese 8y ago
  Honestly google is a better tool unless you already kind of know what you're looking for. Google "linux how much space on drive" and the first hit tells you exactly what you need. Another question someone might ask is "how do I change my password". Google for "linux change password" and there is a special help box right at the top of the search results. apropos password and you get this enormous list: apg (1) - generates several random passwords chage (1) - change user password expiry information chgpasswd (8) - update group passwords in batch mode chpasswd (8) - update passwords in batch mode cpgr (8) - copy with locking the given file to the password or gr... cppw (8) - copy with locking the given file to the password or gr... cracklib-check (8) - Check passwords using libcrack2 create-cracklib-dict (8) - Check passwords using libcrack2 crypt (3) - password and data encryption crypt_r (3) - password and data encryption des_read_2passwords (3ssl) - Compatibility user interface functions des_read_password (3ssl) - Compatibility user interface functions doveadm-pw (1) - Dovecot's password hash generator endpwent (3) - get password file entry endspent (3) - get shadow password file entry EVP_BytesToKey (3ssl) - password based encryption routine expiry (1) - check and enforce password expiration policy fgetpwent (3) - get password file entry fgetspent (3) - get shadow password file entry fgetspent_r (3) - get shadow password file entry getpass (3) - get a password getpw (3) - reconstruct password line entry getpwent (3) - get password file entry getpwnam (3) - get password file entry getpwnam_r (3) - get password file entry getpwuid (3) - get password file entry getpwuid_r (3) - get password file entry getspent (3) - get shadow password file entry getspent_r (3) - get shadow password file entry getspnam (3) - get shadow password file entry getspnam_r (3) - get shadow password file entry git-credential-cache (1) - Helper to temporarily store passwords in memory gitcredentials (7) - providing usernames and passwords to Git grpconv (8) - convert to and from shadow passwords and groups grpunconv (8) - convert to and from shadow passwords and groups grub-mkpasswd-pbkdf2 (1) - generate hashed password for GRUB lckpwdf (3) - get shadow password file entry login.defs (5) - shadow password suite configuration lppasswd (1) - add, change, or delete digest passwords. Net::LDAP::Control::PasswordPolicy (3pm) - LDAPv3 Password Policy control object Net::LDAP::Extension::SetPassword (3pm) - LDAPv3 Modify Password extension ob... pam_pwhistory (8) - PAM module to remember last passwords pam_unix (8) - Module for traditional password authentication passwd (1) - change user password passwd (1ssl) - compute password hashes passwd (5) - the password file passwd2des (3) - RFS password encryption putpwent (3) - write a password file entry putspent (3) - get shadow password file entry pwck (8) - verify integrity of password files pwconv (8) - convert to and from shadow passwords and groups pwunconv (8) - convert to and from shadow passwords and groups seahorse (1) - Passwords and Keys setpwent (3) - get password file entry setspent (3) - get shadow password file entry sgetspent (3) - get shadow password file entry sgetspent_r (3) - get shadow password file entry shadow (5) - shadowed password file shadowconfig (8) - toggle shadow passwords on and off smbpasswd (5) - The Samba encrypted password file smbpasswd (8) - change a user's SMB password ulckpwdf (3) - get shadow password file entry unix_chkpwd (8) - Helper binary that verifies the password of the curren... unix_update (8) - Helper binary that updates the password of a given user vigr (8) - edit the password, group, shadow-password or shadow-gr... vipw (8) - edit the password, group, shadow-password or shadow-gr... xcrypt (3) - RFS password encryption xdecrypt (3) - RFS password encryption xencrypt (3) - RFS password encryption If you didn't already know you were looking for the "passwd" command it might be hard to pick it out of the list.
  - catwell 8y ago
    $ apropos -a change password chage (1) - change user password expiry information kpasswd (1) - change a user's Kerberos password passwd (1) - change user password PKCS12_newpass (3ssl) - change the password of a PKCS12 structure $ apropos -a space disk df (1) - report file system disk space usage df (1p) - report free disk space
    - jandrese 8y ago
      The fact that the search defaults to "or" instead of "and" is a design flaw IMHO. By far the most common case when you have multiple arguments is that you want the item that contains all of the keywords.
  - cpmouter 8y ago
    Filter it by section... man -k -S1 password
    - jandrese 8y ago
      Nothing says user friendly like making the user read the manual for his manual so he can memorize the nine different categories (plus perhaps custom categores like TCLs) to get the manual page he wants. I use man and apropos all of the time, but I have no illusion that they're new user friendly. They're amazing when you just need to look up some options or get the syntax for a system call, but if you've not assimilated the Unix way of thinking they're quite obtuse.
- blister 8y ago
  Hah, I've been using Unix-based OSes in a professional capacity for over 15 years and I've never heard of apropos. :)
- JackCh 8y ago
  There is also `man -k`. -k of course is short for "apropos". It's all very logical and intuitive. (Seriously though, reading the manpage for man is where I first learned about apropos.)
floatingatoll 8y ago
This example would be a lot less ironically-unhelpful if 'apropos' were renamed 'help'.
- jandrese 8y ago
  I think people would complain that apropos doesn't do its job if it were named help. Apropos would be a powerful part of a "help" command, but in 50 years nobody has ever written a help command that gained enough traction to be included in the standard toolchain.
  - floatingatoll 8y ago
    Request granted! Apropos doesn’t do it’s job because it isn’t named — or integrated with — help.
- teddyh 8y ago
  The name “help” is, unfortunately, already taken by a shell built-in command. But one could argue that this help command should be very much more helpful than the restricted functionality it currently implements.

Jaruzel 8y ago

Thank you, you just re-enforced my point; I've been using Linux seriously for about a year now, and I didn't know about 'apropos'. Bash never mentioned it whenever I got stuck, and my learning travels on the internet has never referenced it.

jandrese 8y ago
Honestly google is a better tool unless you already kind of know what you're looking for. Google "linux how much space on drive" and the first hit tells you exactly what you need. Another question someone might ask is "how do I change my password". Google for "linux change password" and there is a special help box right at the top of the search results. apropos password and you get this enormous list: apg (1) - generates several random passwords chage (1) - change user password expiry information chgpasswd (8) - update group passwords in batch mode chpasswd (8) - update passwords in batch mode cpgr (8) - copy with locking the given file to the password or gr... cppw (8) - copy with locking the given file to the password or gr... cracklib-check (8) - Check passwords using libcrack2 create-cracklib-dict (8) - Check passwords using libcrack2 crypt (3) - password and data encryption crypt_r (3) - password and data encryption des_read_2passwords (3ssl) - Compatibility user interface functions des_read_password (3ssl) - Compatibility user interface functions doveadm-pw (1) - Dovecot's password hash generator endpwent (3) - get password file entry endspent (3) - get shadow password file entry EVP_BytesToKey (3ssl) - password based encryption routine expiry (1) - check and enforce password expiration policy fgetpwent (3) - get password file entry fgetspent (3) - get shadow password file entry fgetspent_r (3) - get shadow password file entry getpass (3) - get a password getpw (3) - reconstruct password line entry getpwent (3) - get password file entry getpwnam (3) - get password file entry getpwnam_r (3) - get password file entry getpwuid (3) - get password file entry getpwuid_r (3) - get password file entry getspent (3) - get shadow password file entry getspent_r (3) - get shadow password file entry getspnam (3) - get shadow password file entry getspnam_r (3) - get shadow password file entry git-credential-cache (1) - Helper to temporarily store passwords in memory gitcredentials (7) - providing usernames and passwords to Git grpconv (8) - convert to and from shadow passwords and groups grpunconv (8) - convert to and from shadow passwords and groups grub-mkpasswd-pbkdf2 (1) - generate hashed password for GRUB lckpwdf (3) - get shadow password file entry login.defs (5) - shadow password suite configuration lppasswd (1) - add, change, or delete digest passwords. Net::LDAP::Control::PasswordPolicy (3pm) - LDAPv3 Password Policy control object Net::LDAP::Extension::SetPassword (3pm) - LDAPv3 Modify Password extension ob... pam_pwhistory (8) - PAM module to remember last passwords pam_unix (8) - Module for traditional password authentication passwd (1) - change user password passwd (1ssl) - compute password hashes passwd (5) - the password file passwd2des (3) - RFS password encryption putpwent (3) - write a password file entry putspent (3) - get shadow password file entry pwck (8) - verify integrity of password files pwconv (8) - convert to and from shadow passwords and groups pwunconv (8) - convert to and from shadow passwords and groups seahorse (1) - Passwords and Keys setpwent (3) - get password file entry setspent (3) - get shadow password file entry sgetspent (3) - get shadow password file entry sgetspent_r (3) - get shadow password file entry shadow (5) - shadowed password file shadowconfig (8) - toggle shadow passwords on and off smbpasswd (5) - The Samba encrypted password file smbpasswd (8) - change a user's SMB password ulckpwdf (3) - get shadow password file entry unix_chkpwd (8) - Helper binary that verifies the password of the curren... unix_update (8) - Helper binary that updates the password of a given user vigr (8) - edit the password, group, shadow-password or shadow-gr... vipw (8) - edit the password, group, shadow-password or shadow-gr... xcrypt (3) - RFS password encryption xdecrypt (3) - RFS password encryption xencrypt (3) - RFS password encryption If you didn't already know you were looking for the "passwd" command it might be hard to pick it out of the list.
- catwell 8y ago
  $ apropos -a change password chage (1) - change user password expiry information kpasswd (1) - change a user's Kerberos password passwd (1) - change user password PKCS12_newpass (3ssl) - change the password of a PKCS12 structure $ apropos -a space disk df (1) - report file system disk space usage df (1p) - report free disk space
  - jandrese 8y ago
    The fact that the search defaults to "or" instead of "and" is a design flaw IMHO. By far the most common case when you have multiple arguments is that you want the item that contains all of the keywords.
- cpmouter 8y ago
  Filter it by section... man -k -S1 password
  - jandrese 8y ago
    Nothing says user friendly like making the user read the manual for his manual so he can memorize the nine different categories (plus perhaps custom categores like TCLs) to get the manual page he wants. I use man and apropos all of the time, but I have no illusion that they're new user friendly. They're amazing when you just need to look up some options or get the syntax for a system call, but if you've not assimilated the Unix way of thinking they're quite obtuse.
blister 8y ago
Hah, I've been using Unix-based OSes in a professional capacity for over 15 years and I've never heard of apropos. :)
JackCh 8y ago
There is also `man -k`. -k of course is short for "apropos". It's all very logical and intuitive. (Seriously though, reading the manpage for man is where I first learned about apropos.)

floatingatoll 8y ago

This example would be a lot less ironically-unhelpful if 'apropos' were renamed 'help'.

jandrese 8y ago
I think people would complain that apropos doesn't do its job if it were named help. Apropos would be a powerful part of a "help" command, but in 50 years nobody has ever written a help command that gained enough traction to be included in the standard toolchain.
- floatingatoll 8y ago
  Request granted! Apropos doesn’t do it’s job because it isn’t named — or integrated with — help.
teddyh 8y ago
The name “help” is, unfortunately, already taken by a shell built-in command. But one could argue that this help command should be very much more helpful than the restricted functionality it currently implements.