Linux Ask! is a Q & A web site specific for Linux related questions. Questions are collected, answered and audited by experienced Linux users.
How to transfer your identity.pub to the remote machine’s authorized_keys?
Answer:
While you can ssh into the remote machine and edit the authorized_keys file, it is easier with the following command.
# ssh-copy-id -i identity-rsa-dsa.pub user@remote-server
List 10 most often used commands
Answer:
You can list the top 10 most often used commands in your Linux, by the following method.
# history | awk '{a[$2]++}END{for(i in a){print a[i] " " i}}' | sort -rn | head
135 ls
63 cd
48 exit
46 sudo
34 tail
30 cat
29 df
18 date
17 vi
12 pwd
How to print the current stack backtrace in Perl?
Answer:
To print out the current stack backtrace in Perl, just insert the following code in your script and it will print out the stuff you need.
use Carp qw(cluck);
cluck "This is how we got here!";
How to ignore dummy files (e.g. from CVS, SVN) during rsync?
Answer:
During rsync, you might want to ignore a lot of dummy files, e.g. .bak, .svn, .old files, you can use the following flag as part of your rsync command.
# rsync --cvs-exclude ...
List of files skipped (rsync 3.06):
RCS SCCS CVS CVS.adm RCSLOG cvslog.* tags TAGS .make.state .nse_depinfo *~ #* .#* ,* _$* *$ *.old *.bak *.BAK *.orig *.rej .del-* *.a *.olb *.o *.obj *.so *.exe *.Z *.elc *.ln core .svn/ .git/ .bzr/
How to deny access for Subversion (svn) related files in Apache?
Answer:
To deny access for Subversion (svn) related files under Apache, add the following lines to the Apache configuration (httpd.conf)
<DirectoryMatch .*\.svn/.*>
Deny From All
</DirectoryMatch>
And restart Apache to take effect.
# apachectl -k graceful
