I am totally stuck even after reading both this and this (if it isn't already obvious I don't have much experience with Linux.)I am trying to install WebSphere 8.5 on RHEL6. Everything was going fine with the Installation Manager GUI, then after IBMHTTPServer, Web Server Plugin, and WebSphere Customization Toolbox, I was unable to start the installation manager.Searching the internet let me to believe that testing if even xterm worked would be a good idea and unfortunately it does not.# whoamiroot# xtermWarning: This program is an suid-root program or is being run by the root user.The full text of the error or warning message cannot be safely formattedin this environment. You may get a more descriptive message by running theprogram as a non-root user or by removing the suid bit on the executable.xterm Xt error: Can't open display: %sI am connected to the Linux box using mobaXterm and the xterm command works fine on a cloned VM via the same connection.# echo $DISPLAYlocalhost:10.0# xauth listap01/unix:10  MIT-MAGIC-COOKIE-1  7f20dc9e52baff302a442c46bbd4869bAgain, I am new to this so may not be understanding what is relevant, please let me know if I can post further information.The IBMIM error (removed due to character limit):./IBMIM(IBMIM:22290): GLib-GObject-WARNING **: invalid (NULL) pointer instance(IBMIM:22290): GLib-GObject-CRITICAL **: g_signal_connect_data: assertion `G_TYPE_CHECK_INSTANCE (instance)' failed...(IBMIM:22289): Pango-CRITICAL **: pango_layout_get_line_count: assertion `layout != NULL' failed Floating point exception (core dumped)~Adding xlock, xmag, and ssh -v output:ssh -v root@<ip_address>OpenSSH_6.2p2, OpenSSL 1.0.1c 10 May 2012debug1: Reading configuration data /etc/ssh_configdebug1: Connecting to <ip_address> [<ip_address>] port 22.debug1: Connection established.debug1: identity file /home/mobaxterm/.ssh/id_rsa type -1debug1: identity file /home/mobaxterm/.ssh/id_rsa-cert type -1debug1: identity file /home/mobaxterm/.ssh/id_dsa type -1debug1: identity file /home/mobaxterm/.ssh/id_dsa-cert type -1debug1: identity file /home/mobaxterm/.ssh/id_ecdsa type -1debug1: identity file /home/mobaxterm/.ssh/id_ecdsa-cert type -1debug1: Enabling compatibility mode for protocol 2.0debug1: Local version string SSH-2.0-OpenSSH_6.2debug1: Remote protocol version 2.0, remote software version OpenSSH_5.3debug1: match: OpenSSH_5.3 pat OpenSSH_5*debug1: SSH2_MSG_KEXINIT sentdebug1: SSH2_MSG_KEXINIT receiveddebug1: kex: server->client aes128-ctr hmac-md5 zlib@openssh.comdebug1: kex: client->server aes128-ctr hmac-md5 zlib@openssh.comdebug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sentdebug1: expecting SSH2_MSG_KEX_DH_GEX_GROUPdebug1: SSH2_MSG_KEX_DH_GEX_INIT sentdebug1: expecting SSH2_MSG_KEX_DH_GEX_REPLYdebug1: Server host key: RSA f6:69:0b:e8:73:a6:8e:5a:e5:de:95:96:cb:61:2e:4adebug1: Host '<ip_address>' is known and matches the RSA host key.debug1: Found key in /home/mobaxterm/.ssh/known_hosts:2debug1: ssh_rsa_verify: signature correctdebug1: SSH2_MSG_NEWKEYS sentdebug1: expecting SSH2_MSG_NEWKEYSdebug1: SSH2_MSG_NEWKEYS receiveddebug1: Roaming not allowed by serverdebug1: SSH2_MSG_SERVICE_REQUEST sentdebug1: SSH2_MSG_SERVICE_ACCEPT receiveddebug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic,passworddebug1: Next authentication method: publickeydebug1: Trying private key: /home/mobaxterm/.ssh/id_rsadebug1: Trying private key: /home/mobaxterm/.ssh/id_dsadebug1: Trying private key: /home/mobaxterm/.ssh/id_ecdsadebug1: Next authentication method: passwordroot@<ip_address>'s password:debug1: Enabling compression at level 6.debug1: Authentication succeeded (password).Authenticated to <ip_address> ([<ip_address>]:22).debug1: channel 0: new [client-session]debug1: Requesting no-more-sessions@openssh.comdebug1: Entering interactive session.debug1: No xauth program.debug1: Requesting X11 forwarding with authentication spoofing.Last login: Thu Mar 27 15:43:13 2014 from <build_machine_ip_address># xlock-bash: xlock: command not found# xmagError: Can't open display: localhost:12.0Verification of xauth install and PATH (honestly I wasn't 100% that the below is sufficient, what is the difference between xauth and xorg-x11-xauth?, just need parent directory included in PATH?, etc):[root@vm-ap01 apps]# yum whatprovides xauthLoaded plugins: product-id, refresh-packagekit, security, subscription-managerThis system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.1:xorg-x11-xauth-1.0.2-7.1.el6.x86_64 : X.Org X11 X authority utilitiesRepo        : myrepoMatched from:Other       : xauth1:xorg-x11-xauth-1.0.2-7.1.el6.x86_64 : X.Org X11 X authority utilitiesRepo        : installedMatched from:Other       : Provides-match: xauth[root@vm-ap01 apps]# rpm -ql xauthpackage xauth is not installed[root@vm-ap01 apps]# rpm -ql xorg-x11-xauth/usr/bin/mkxauth/usr/bin/xauth/usr/share/doc/xorg-x11-xauth-1.0.2/usr/share/doc/xorg-x11-xauth-1.0.2/AUTHORS/usr/share/doc/xorg-x11-xauth-1.0.2/COPYING/usr/share/doc/xorg-x11-xauth-1.0.2/ChangeLog/usr/share/doc/xorg-x11-xauth-1.0.2/NEWS/usr/share/doc/xorg-x11-xauth-1.0.2/README/usr/share/man/man1/mkxauth.1x.gz/usr/share/man/man1/xauth.1.gz[root@vm-ap01 apps]# echo $PATH/usr/lib64/qt-3.3/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/binI'm not exactly sure about from the remote side, but below is the output when connected via mobaxterm from my workstation to RHEL box:[root@vm-ap01 apps]# echo $DISPLAYlocalhost:13.0[root@vm-ap01 apps]# xauth list | awk '{print $1, $2}'vm-ap01/unix:10 MIT-MAGIC-COOKIE-1vm-ap01/unix:11 MIT-MAGIC-COOKIE-1vm-ap01/unix:12 MIT-MAGIC-COOKIE-1vm-ap01/unix:13 MIT-MAGIC-COOKIE-1vm-ap01/unix:14 MIT-MAGIC-COOKIE-1[root@vm-ap01 apps]# strace xclockexecve(/usr/bin/xclock, [xclock], [/* 34 vars */]) = 0brk(0)                                  = 0xc2b000mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f08611d5000access(/etc/ld.so.preload, R_OK)      = -1 ENOENT (No such file or directory)open(/etc/ld.so.cache, O_RDONLY)      = 3fstat(3, {st_mode=S_IFREG|0644, st_size=99025, ...}) = 0mmap(NULL, 99025, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f08611bc000close(3)                                = 0open(/usr/lib64/libXaw.so.7, O_RDONLY) = 3read(3, \177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0@|!\3601\0\0\0..., 832) = 832fstat(3, {st_mode=S_IFREG|0755, st_size=412648, ...}) = 0mmap(0x31f0200000, 2506392, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x31f0200000mprotect(0x31f025a000, 2093056, PROT_NONE) = 0mmap(0x31f0459000, 45056, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x59000) = 0x31f0459000close(3)                                = 0open(/usr/lib64/libXmu.so.6, O_RDONLY) = 3read(3, \177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0pf`/:\0\0\0..., 832) = 832fstat(3, {st_mode=S_IFREG|0755, st_size=107600, ...}) = 0mmap(0x3a2f600000, 2201280, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x3a2f600000mprotect(0x3a2f618000, 2097152, PROT_NONE) = 0mmap(0x3a2f818000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x18000) = 0x3a2f818000close(3)                                = 0open(/usr/lib64/libXt.so.6, O_RDONLY) = 3read(3, \177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0p1\2418:\0\0\0..., 832) = 832fstat(3, {st_mode=S_IFREG|0755, st_size=412832, ...}) = 0mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f08611bb000mmap(0x3a38a00000, 2508640, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x3a38a00000mprotect(0x3a38a5f000, 2093056, PROT_NONE) = 0mmap(0x3a38c5e000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x5e000) = 0x3a38c5e000mmap(0x3a38c64000, 1888, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x3a38c64000close(3)                                = 0open(/usr/lib64/libX11.so.6, O_RDONLY) = 3read(3, \177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\360\334\3412:\0\0\0..., 832) = 832fstat(3, {st_mode=S_IFREG|0755, st_size=1300376, ...}) = 0mmap(0x3a32e00000, 3394936, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x3a32e00000mprotect(0x3a32f37000, 2097152, PROT_NONE) = 0mmap(0x3a33137000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x137000) = 0x3a33137000close(3)                                = 0open(/usr/lib64/libXrender.so.1, O_RDONLY) = 3read(3, \177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\300\30\3404:\0\0\0..., 832) = 832fstat(3, {st_mode=S_IFREG|0755, st_size=42472, ...}) = 0mmap(0x3a34e00000, 2135176, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x3a34e00000mprotect(0x3a34e09000, 2097152, PROT_NONE) = 0mmap(0x3a35009000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x9000) = 0x3a35009000close(3)                                = 0open(/usr/lib64/libXft.so.2, O_RDONLY) = 3read(3, \177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\320? ::\0\0\0..., 832) = 832fstat(3, {st_mode=S_IFREG|0755, st_size=88632, ...}) = 0mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f08611ba000mmap(0x3a3a200000, 2181216, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x3a3a200000mprotect(0x3a3a214000, 2097152, PROT_NONE) = 0mmap(0x3a3a414000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x14000) = 0x3a3a414000close(3)                                = 0open(/usr/lib64/libxkbfile.so.1, O_RDONLY) = 3read(3, \177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\320J`\3601\0\0\0..., 832) = 832fstat(3, {st_mode=S_IFREG|0755, st_size=151792, ...}) = 0mmap(0x31f0600000, 2245768, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x31f0600000mprotect(0x31f0623000, 2097152, PROT_NONE) = 0mmap(0x31f0823000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x23000) = 0x31f0823000mmap(0x31f0824000, 1160, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x31f0824000close(3)                                = 0open(/lib64/libm.so.6, O_RDONLY)      = 3read(3, \177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0p> 0:\0\0\0..., 832) = 832fstat(3, {st_mode=S_IFREG|0755, st_size=599384, ...}) = 0mmap(0x3a30200000, 2633912, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x3a30200000mprotect(0x3a30283000, 2093056, PROT_NONE) = 0mmap(0x3a30482000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x82000) = 0x3a30482000close(3)                                = 0open(/lib64/libc.so.6, O_RDONLY)      = 3read(3, \177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0000\356!/:\0\0\0..., 832) = 832fstat(3, {st_mode=S_IFREG|0755, st_size=1926800, ...}) = 0mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f08611b9000mmap(0x3a2f200000, 3750152, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x3a2f200000mprotect(0x3a2f38b000, 2093056, PROT_NONE) = 0mmap(0x3a2f58a000, 20480, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x18a000) = 0x3a2f58a000mmap(0x3a2f58f000, 18696, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x3a2f58f000close(3)                                = 0open(/usr/lib64/libXext.so.6, O_RDONLY) = 3read(3, \177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\3006 3:\0\0\0..., 832) = 832fstat(3, {st_mode=S_IFREG|0755, st_size=80944, ...}) = 0mmap(0x3a33200000, 2174216, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x3a33200000mprotect(0x3a33212000, 2097152, PROT_NONE) = 0mmap(0x3a33412000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x12000) = 0x3a33412000close(3)                                = 0open(/usr/lib64/libXpm.so.4, O_RDONLY) = 3read(3, \177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0`/\340\3571\0\0\0..., 832) = 832fstat(3, {st_mode=S_IFREG|0755, st_size=72832, ...}) = 0mmap(0x31efe00000, 2165496, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x31efe00000mprotect(0x31efe11000, 2093056, PROT_NONE) = 0mmap(0x31f0010000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x10000) = 0x31f0010000close(3)                                = 0open(/usr/lib64/libSM.so.6, O_RDONLY) = 3read(3, \177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0@\32`?:\0\0\0..., 832) = 832fstat(3, {st_mode=S_IFREG|0755, st_size=34024, ...}) = 0mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f08611b8000mmap(0x3a3f600000, 2126776, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x3a3f600000mprotect(0x3a3f607000, 2097152, PROT_NONE) = 0mmap(0x3a3f807000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x7000) = 0x3a3f807000close(3)                                = 0open(/usr/lib64/libICE.so.6, O_RDONLY) = 3read(3, \177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0pM`>:\0\0\0..., 832) = 832fstat(3, {st_mode=S_IFREG|0755, st_size=101608, ...}) = 0mmap(0x3a3e600000, 2208960, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x3a3e600000mprotect(0x3a3e617000, 2097152, PROT_NONE) = 0mmap(0x3a3e817000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x17000) = 0x3a3e817000mmap(0x3a3e818000, 13504, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x3a3e818000close(3)                                = 0open(/usr/lib64/libxcb.so.1, O_RDONLY) = 3read(3, \177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0`\230`2:\0\0\0..., 832) = 832fstat(3, {st_mode=S_IFREG|0755, st_size=124728, ...}) = 0mmap(0x3a32600000, 2217576, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x3a32600000mprotect(0x3a3261d000, 2097152, PROT_NONE) = 0mmap(0x3a3281d000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1d000) = 0x3a3281d000close(3)                                = 0open(/lib64/libdl.so.2, O_RDONLY)     = 3read(3, \177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\340\r\340.:\0\0\0..., 832) = 832fstat(3, {st_mode=S_IFREG|0755, st_size=22536, ...}) = 0mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f08611b7000mmap(0x3a2ee00000, 2109696, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x3a2ee00000mprotect(0x3a2ee02000, 2097152, PROT_NONE) = 0mmap(0x3a2f002000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0x3a2f002000close(3)                                = 0open(/usr/lib64/libfontconfig.so.1, O_RDONLY) = 3read(3, \177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\200\\`4:\0\0\0..., 832) = 832fstat(3, {st_mode=S_IFREG|0755, st_size=223040, ...}) = 0mmap(0x3a34600000, 2316776, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x3a34600000mprotect(0x3a34634000, 2097152, PROT_NONE) = 0mmap(0x3a34834000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x34000) = 0x3a34834000close(3)                                = 0open(/usr/lib64/libfreetype.so.6, O_RDONLY) = 3read(3, \177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\310\2404:\0\0\0..., 832) = 832fstat(3, {st_mode=S_IFREG|0755, st_size=644912, ...}) = 0mmap(0x3a34a00000, 2737840, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x3a34a00000mprotect(0x3a34a98000, 2093056, PROT_NONE) = 0mmap(0x3a34c97000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x97000) = 0x3a34c97000close(3)                                = 0mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f08611b6000open(/lib64/libuuid.so.1, O_RDONLY)   = 3read(3, \177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\240\25 ;:\0\0\0..., 832) = 832fstat(3, {st_mode=S_IFREG|0755, st_size=18936, ...}) = 0mmap(0x3a3b200000, 2111272, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x3a3b200000mprotect(0x3a3b204000, 2093056, PROT_NONE) = 0mmap(0x3a3b403000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x3000) = 0x3a3b403000close(3)                                = 0open(/usr/lib64/libXau.so.6, O_RDONLY) = 3read(3, \177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\320\r\2402:\0\0\0..., 832) = 832fstat(3, {st_mode=S_IFREG|0755, st_size=13168, ...}) = 0mmap(0x3a32a00000, 2106112, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x3a32a00000mprotect(0x3a32a02000, 2097152, PROT_NONE) = 0mmap(0x3a32c02000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0x3a32c02000close(3)                                = 0open(/lib64/libexpat.so.1, O_RDONLY)  = 3read(3, \177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\320<`3:\0\0\0..., 832) = 832fstat(3, {st_mode=S_IFREG|0755, st_size=167648, ...}) = 0mmap(0x3a33600000, 2260432, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x3a33600000mprotect(0x3a33626000, 2093056, PROT_NONE) = 0mmap(0x3a33825000, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x25000) = 0x3a33825000close(3)                                = 0mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f08611b5000mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f08611b4000mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f08611b2000arch_prctl(ARCH_SET_FS, 0x7f08611b2740) = 0mprotect(0x3a30482000, 4096, PROT_READ) = 0mprotect(0x3a2f58a000, 16384, PROT_READ) = 0mprotect(0x3a2f002000, 4096, PROT_READ) = 0mprotect(0x3a2ec1f000, 4096, PROT_READ) = 0munmap(0x7f08611bc000, 99025)           = 0open(/usr/lib/locale/locale-archive, O_RDONLY) = 3fstat(3, {st_mode=S_IFREG|0644, st_size=99158576, ...}) = 0mmap(NULL, 99158576, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f085b321000close(3)                                = 0brk(0)                                  = 0xc2b000brk(0xc4c000)                           = 0xc4c000open(/proc/meminfo, O_RDONLY|O_CLOEXEC) = 3fstat(3, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f08611d4000read(3, MemTotal:        1923456 kB\nMemF..., 1024) = 1024close(3)                                = 0munmap(0x7f08611d4000, 4096)            = 0socket(PF_NETLINK, SOCK_RAW, 0)         = 3bind(3, {sa_family=AF_NETLINK, pid=0, groups=00000000}, 12) = 0getsockname(3, {sa_family=AF_NETLINK, pid=30849, groups=00000000}, [12]) = 0sendto(3, \24\0\0\0\26\0\1\3\320\3545S\0\0\0\0\0\0\0\0, 20, 0, {sa_family=AF_NETLINK, pid=0, groups=00000000}, 12) = 20recvmsg(3, {msg_name(12)={sa_family=AF_NETLINK, pid=0, groups=00000000}, msg_iov(1)=[{0\0\0\0\24\0\2\0\320\3545S\201x\0\0\2\10\200\376\1\0\0\0\10\0\1\0\177\0\0\1..., 4096}], msg_controllen=0, msg_flags=0}, 0) = 108recvmsg(3, {msg_name(12)={sa_family=AF_NETLINK, pid=0, groups=00000000}, msg_iov(1)=[{@\0\0\0\24\0\2\0\320\3545S\201x\0\0\n\200\200\376\1\0\0\0\24\0\1\0\0\0\0\0..., 4096}], msg_controllen=0, msg_flags=0}, 0) = 128recvmsg(3, {msg_name(12)={sa_family=AF_NETLINK, pid=0, groups=00000000}, msg_iov(1)=[{\24\0\0\0\3\0\2\0\320\3545S\201x\0\0\0\0\0\0\1\0\0\0\24\0\1\0\0\0\0\0..., 4096}], msg_controllen=0, msg_flags=0}, 0) = 20close(3)                                = 0socket(PF_FILE, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0) = 3connect(3, {sa_family=AF_FILE, path=/var/run/nscd/socket}, 110) = -1 ENOENT (No such file or directory)close(3)                                = 0socket(PF_FILE, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0) = 3connect(3, {sa_family=AF_FILE, path=/var/run/nscd/socket}, 110) = -1 ENOENT (No such file or directory)close(3)                                = 0open(/etc/nsswitch.conf, O_RDONLY)    = 3fstat(3, {st_mode=S_IFREG|0644, st_size=1688, ...}) = 0mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f08611d4000read(3, #\n# /etc/nsswitch.conf\n#\n# An ex..., 4096) = 1688read(3, , 4096)                       = 0close(3)                                = 0munmap(0x7f08611d4000, 4096)            = 0open(/etc/host.conf, O_RDONLY)        = 3fstat(3, {st_mode=S_IFREG|0644, st_size=9, ...}) = 0mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f08611d4000read(3, multi on\n, 4096)             = 9read(3, , 4096)                       = 0close(3)                                = 0munmap(0x7f08611d4000, 4096)            = 0getpid()                                = 30849open(/etc/resolv.conf, O_RDONLY)      = 3fstat(3, {st_mode=S_IFREG|0644, st_size=355, ...}) = 0mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f08611d4000read(3, # Generated by NetworkManager\n\n\n..., 4096) = 355read(3, , 4096)                       = 0close(3)                                = 0munmap(0x7f08611d4000, 4096)            = 0open(/etc/ld.so.cache, O_RDONLY)      = 3fstat(3, {st_mode=S_IFREG|0644, st_size=99025, ...}) = 0mmap(NULL, 99025, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f08611bc000close(3)                                = 0open(/lib64/tls/x86_64/libnss_files,dns.so.2, O_RDONLY) = -1 ENOENT (No such file or directory)stat(/lib64/tls/x86_64, 0x7fff58448b00) = -1 ENOENT (No such file or directory)open(/lib64/tls/libnss_files,dns.so.2, O_RDONLY) = -1 ENOENT (No such file or directory)stat(/lib64/tls, {st_mode=S_IFDIR|0555, st_size=4096, ...}) = 0open(/lib64/x86_64/libnss_files,dns.so.2, O_RDONLY) = -1 ENOENT (No such file or directory)stat(/lib64/x86_64, 0x7fff58448b00)   = -1 ENOENT (No such file or directory)open(/lib64/libnss_files,dns.so.2, O_RDONLY) = -1 ENOENT (No such file or directory)stat(/lib64, {st_mode=S_IFDIR|0555, st_size=12288, ...}) = 0open(/usr/lib64/tls/x86_64/libnss_files,dns.so.2, O_RDONLY) = -1 ENOENT (No such file or directory)stat(/usr/lib64/tls/x86_64, 0x7fff58448b00) = -1 ENOENT (No such file or directory)open(/usr/lib64/tls/libnss_files,dns.so.2, O_RDONLY) = -1 ENOENT (No such file or directory)stat(/usr/lib64/tls, {st_mode=S_IFDIR|0555, st_size=4096, ...}) = 0open(/usr/lib64/x86_64/libnss_files,dns.so.2, O_RDONLY) = -1 ENOENT (No such file or directory)stat(/usr/lib64/x86_64, 0x7fff58448b00) = -1 ENOENT (No such file or directory)open(/usr/lib64/libnss_files,dns.so.2, O_RDONLY) = -1 ENOENT (No such file or directory)stat(/usr/lib64, {st_mode=S_IFDIR|0555, st_size=69632, ...}) = 0munmap(0x7f08611bc000, 99025)           = 0open(/usr/lib64/X11/XtErrorDB, O_RDONLY) = -1 ENOENT (No such file or directory)getuid()                                = 0geteuid()                               = 0getuid()                                = 0write(2, Error: , 7Error: )                  = 7write(2, Can't open display: localhost:13..., 34Can't open display: localhost:13.0) = 34write(2, \n, 1)                       = 1exit_group(1)                           = ?[root@vm-ap01 apps]#Looks like SE Linux is enabled as well:[root@vm-ap01 apps]# sestatusSELinux status:                 enabledSELinuxfs mount:                /selinuxCurrent mode:                   enforcingMode from config file:          enforcingPolicy version:                 24Policy from config file:        targeted
xterm no longer starting as root user on RHEL6
ssh;x11
debug1: No xauth program.That looks like a problem. Make sure that you have the xauth program installed on both the server and the client. You're logging in as root, so make sure that xauth is in root's PATH, too. I'm not completely sure that this is the problem, because in my tests I found other error messages (X11 forwarding request failed on channel 0, appearing even without -v) if X11 forwarding wasn't working due to a lack of xauth, but this may be due to a version or configuration difference.In the strace xclock output, you identified a line that doesn't match between a working machine and a non-working machine. On the non-working machine:open(/lib64/tls/x86_64/libnss_files,dns.so.2, O_RDONLY) = -1 ENOENT (No such file or directory)That file name is wrong: libnss_files,dns.so.2 isn't supposed to exist, what exists is libnss_files.so.2 and libnss_dns.so.2. These files are used by NSS, the component of the standard C library that manages sources for names of hosts, users, etc. Typical sources include files (/etc/hosts, /etc/passwd, ), dns, ldap, etc. You have a source called files,dns instead of a source called files and a source called dns. Edit the file /etc/nsswitch.conf and change the line(s) SOMETHING: files,dns to SOMETHING: files dns, i.e. the words must be whitespace-separated, not comma-separated.I don't fully understand the trace but this is definitely wrong and could be causing your problem. In particular, I think that a wrong hosts:  line in /etc/nsswitch.conf might be causing your system not to find localhost.