Principles of Network and System Administration,
What is network and systemadministration?,
Applying technology in an environment,
The human role in systems,
Ethical issues,
Is systemadministration a discipline?,
the challenges of systemadministration,
Common practice and good practice,
Bugs and emergent phenomena ,
Themeta principles of systemadministration ,
Knowledge is a jigsaw puzzle,
To the student ,
Some road-maps
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[crit] 26110#0: *7 open() "/var/lib/nginx/tmp/client_body/0000000001" failed (13: Permission denied), client: 192, server: xxxx.com, request: "POST /buploadsys HTTP/1.1", host: "xxx.com", referrer: "http://xxxx.com//jsfxhtml/flyer/uploadImageForProduct.xhtml?product=1" chown -R www-data:www-data /var/lib/nginx^C bash-4.4# bash-4.4# chown -R www-data:www-data /var/lib/nginx |
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tigervncserver -localhost no :1 Make it permanent by adding into the file /etc/vnc.conf the option: $localhost = "no" Even though the file reads that the default is localhost=no that is not the case. |
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https://www.mono-project.com/download/stable/#download-lin-fedora |
Nginx
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server { client_max_body_size 100M; ... } |
Apache
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LimitRequestBody 104857600 |
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It's failing because passwd manipulates a temporary file, and then attempts to rename it to /etc/shadow. This fails because /etc/shadow is a mountpoint -- which cannot be replaced -- which results in this error (captured using strace) rename("/etc/nshadow", "/etc/shadow") = -1 EBUSY (Device or resource busy) You can reproduce this trivially from the command line: # cd /etc # touch foo # mv foo shadow mv: cannot move 'foo' to 'shadow': Device or resource busy You could work around this by mounting a directory containing my_shadow and my_passwd somewhere else, and then symlinking /etc/passwd and /etc/shadow in the container appropriately: $ docker run -it --rm -v $PWD/my_etc:/my_etc centos [root@kutayzorlu.com /]# ln -sf /my_etc/my_passwd /etc/passwd [root@kutayzorlu.com /]# ln -sf /my_etc/my_shadow /etc/shadow [root@kutayzorlu.com /]# ls -l /etc/{shadow,passwd} lrwxrwxrwx. 1 root root 17 Oct 8 17:48 /etc/passwd -> /my_etc/my_passwd lrwxrwxrwx. 1 root root 17 Oct 8 17:48 /etc/shadow -> /my_etc/my_shadow [root@kutayzorlu.com /]# passwd root Changing password for user root. New password: Retype new password: passwd: all authentication tokens updated successfully. [root@kutayzorlu.com /]# |
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1) /etc/sysconfig/docker 2) /etc/docker/daemon.json 1) Updating ‘/etc/sysconfig/docker’ file: cat /etc/sysconfig/docker OPTIONS='--selinux-enabled --log-driver=journald --signature-verification=false -D -g /home/thiru/docker' g -> specify docker’s root directory 2) Updating /etc/docker/daemon.json [root@docker-host-1 ~]# cat /etc/docker/daemon.json { "graph": "/home/thiru/docker" } |