{"id":2270,"date":"2010-01-30T17:10:41","date_gmt":"2010-01-30T22:10:41","guid":{"rendered":"http:\/\/g33kinfo.com\/info\/?p=2270"},"modified":"2010-01-30T17:10:41","modified_gmt":"2010-01-30T22:10:41","slug":"ldd","status":"publish","type":"post","link":"https:\/\/g33kinfo.com\/info\/ldd\/","title":{"rendered":"ldd"},"content":{"rendered":"

I recently had a client that went to backup a specific account using the cpanel backup script ‘pkgacct username’ located in the \/scripts folder. Whenever he tried to use this script, the backup would fail. I found the error was not related to the cpanel script itself but to the gzip command itself. I needed to re-install gzip, which when complated, repaired the issue. In order to track this issue down, I used the ldd command<\/p>\n

The ldd command is one that is rarely used by most and can be very helpful in deducing specific install error related to shared library dependencies. The actual ldd command is used for printing shared library dependencies like so;<\/p>\n


\nroot@host [~]# ldd \/bin\/tar
\n libc.so.6 => \/lib\/tls\/libc.so.6 (0xb7eae000)
\n \/lib\/ld-linux.so.2 (0xb7fe8000)<\/p>\n

root@host [~]# ldd \/bin\/gzip
\n libc.so.6 => \/lib\/tls\/libc.so.6 (0xb7eae000)
\n \/lib\/ld-linux.so.2 (0xb7fe8000)
\n<\/code><\/p>\n

We can see that the tar\/gzip commands uses the specified files in order to function correctly. If those files are corrupted or missing, then the pkgacct script will fail.<\/p>\n

Using the ldd, gdb and strace commands helped me find and quickly solve this specific error.<\/p>\n

Oh, to repair this error, I simply used RPM to uninstall and re-install the gzip package. I downloaded the rpm from CentOS<\/a>;<\/p>\n

http:\/\/mirror.centos.org\/centos-5\/5.4\/os\/x86_64\/CentOS\/gzip-1.3.5-10.el5.centos.x86_64.rpm<\/p>\n

rpm -qpR {.rpm-file} Find out what dependencies a rpm file has<\/p>\n

rpm -ev {package} Erase\/remove\/ an installed package<\/p>\n

rpm -ev –nodeps {package} Erase\/remove\/ an installed package without checking for dependencies<\/p>\n

rpm -ivh {rpm-file} \tInstall the package<\/p>\n","protected":false},"excerpt":{"rendered":"

I recently had a client that went to backup a specific account using the cpanel backup script ‘pkgacct username’ located in the \/scripts folder. Whenever he tried to use this script, the backup would fail. I found the error was not related to the cpanel script itself but to the gzip command itself. I needed… <\/p>\n

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