If you need full debug of the Web Agent or Policy Server installer script until it install the product
you can run the installer that way :
# sh -x ./ca-wa-12.52-sp01-cr05-linux-x86-64.bin -i console 2>&1 | tee installer.txt
Installer.txt will show the output like this, which might help you to troubleshoot issues with disk space, etc.
+ PATH=/usr/lib64/qt-3.3/bin:/usr/kerberos/sbin:/usr/kerberos/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/opt/CA/SharedComponents/bin:/opt/CA/SharedComponents/ccs/cam/bin:/root/bin:/bin:/usr/bin:/sbin:/usr/sbin:/usr/local/bin
+ BLOCKSIZE=32768
+ JRESTART=4
+ JREREALSIZE=32424781
+ ARCHSIZE=261
+ RESSIZE=2546
+ RESREALSIZE=83421891
+ ARCHREALSIZE=8522990
+ LAX_NL_CURRENT_VM=jre/bin/java
+ LAX_INSTALLER_UNIX_INTERNAL_PROPERTY_0=bin/java
+ DEFAULTPERMS=002
+ INSTALLER_OVERRIDE_VMLIST=1.6+
+ INSTALLER_STDERR_REDIRECT=
+ INSTALLER_STDOUT_REDIRECT=
+ INSTALLER_HEAP_SIZE_INITIAL=16777216
+ INSTALLER_HEAP_SIZE_MAX=50331648
+ INSTALLER_OPTIONAL_ARGS=
+ RESOURCE_DIR=Linux
+ DEFAULT_UI_MODE=GUI
+ GREP=grep
++ uname
+ '[' Linux = SunOS -a -x /usr/xpg4/bin/grep ']'
+ case `uname -s` in
++ uname -s
+ TR=/usr/bin/tr
+ uimodeuse='not set'
+ hasSeenIUse=false
+ tmpArgsUse=
+ origArgsUse='-i console'
+ for arg in '"$@"'
+ '[' -i '!=' '' ']'
+ tmpArgsUse=' "-i"'
+ '[' -i = -i -o -i = -I ']'
+ hasSeenIUse=true
+ for arg in '"$@"'
+ '[' console '!=' '' ']'
+ tmpArgsUse=' "-i" "console"'
+ '[' console = -i -o console = -I ']'
+ '[' true = true ']'
etc...