Linux – sar: enable data collecting

arch-linuxlinuxperformance-monitoringsar

I've just installed the sysstat package on Manjaro. When running sar for the first time I see:

Cannot open /var/log/sa/sa21: No such file or directory
Please check if data collecting is enabled

How do I check whether data collecting is enabled?

If it's not, how would I go about enabling it?

Best Answer

On Ubuntu 16.04 I just ran into this same issue. After some grousing around I found I needed to enable the service by editing the file /etc/default/sysstat

Change ENABLED="false" to true:

# Should sadc collect system activity informations? Valid values
# are "true" and "false". Please do not put other values, they
# will be overwritten by debconf!
ENABLED="true"

Restart the service:

systemctl restart sysstat.service

Just a quick note, like a dingleberry I wasn't reading closely enough and navigated to /etc/sysstat/sysstat instead of /etc/default/sysstat and wasted 5 minutes poking around the man page and stuff.

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In Redhat based systems (quite possibly others) /etc/sysconfig/named can define ROOTDIR=/var/named/chroot which does what you think it does. The bind-chroot package only sets up the directory structure under /var/named/chroot. If ROOTDIR is defined there AND bind-chroot isn't installed I'd expect to see that error.

-Dave

Linux – Checkinstall failed with /root/rpmbuild has no source directory

Install the rpmdevtools package:

Name       : rpmdevtools
Arch       : noarch
Version    : 7.5
Release    : 1.el6
Size       : 216 k
Repo       : installed
From repo  : base
Summary    : RPM Development Tools
URL        : https://fedorahosted.org/rpmdevtools/
License    : GPLv2+ and GPLv2
Description: This package contains scripts and (X)Emacs support files to aid in
           : development of RPM packages.
           : rpmdev-setuptree    Create RPM build tree within user's home directory
           : rpmdev-diff         Diff contents of two archives
           : rpmdev-newspec      Creates new .spec from template
           : rpmdev-rmdevelrpms  Find (and optionally remove) "development" RPMs
           : rpmdev-checksig     Check package signatures using alternate RPM keyring
           : rpminfo             Print information about executables and libraries
           : rpmdev-md5/sha*     Display checksums of all files in an archive file
           : rpmdev-vercmp       RPM version comparison checker
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           : rpmdev-bumpspec     Bump revision in specfile
           : ...and many more.

and run rpmdev-setuptree to create the directory structure:

# tree -L 1 rpmbuild/
rpmbuild/
├── BUILD
├── RPMS
├── SOURCES
├── SPECS
└── SRPMS

Best Answer

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