Bash color variables
karlo # Reset Color_Off='\033
Bash add UTF8 (UTF-8) BOM to file
sed -i '1s/^\(\xef\xbb\xbf\)\?/\xef\xbb\xbf/' foo-*
Certbot centos 7
pip uninstall requests yum reinstall python-requests pip uninstall six yum reinstall python-six pip uninstall urllib3 yum reinstall python-urllib3 ; yum install http://cbs.centos.org/kojifiles/packages/pyOpenSSL/16.2.0/3.el7/noarch/python2-pyOpenSSL-16.2.0-3.el7.noarch.rpm ; yum install certbot certbot-apache
Tail: prepend file name to tailing output (bash)
cd /opt/arcsight/connectors/; tail -f *_con1_rsyslog_paloalto_2500*/current/logs/agent.out.wrapper.log | awk '/^==> / {a=substr($0, 5, length-8); next} {print a":"$0}'
Personal (manual) template for internal hosts
This might help someone else, too. These are the things I do for an internal VM (on my hypervisor at home). This document will/might evolve over time. Default OS is…
Bash suppress all output of script (echo off – style)
exec 1>/dev/null 2>/dev/null at the top of your script
Install Domoticz on Centos 7
Old version below NEW ADDED NOTES (Thanks Charles Orbello) The new version of domoticz requires a new version of cmake and the old version of domotics need a different version…
Yum Error: database disk image is malformed fix
root@host:~# yum update Loaded plugins: product-id, search-disabled-repos, security, subscription-manager Setting up Update Process Error: database disk image is malformed root@host:~# yum clean all Loaded plugins: product-id, search-disabled-repos, security, subscription-manager Cleaning…
Bash compound commands (()){{}}{}[[]]
Compound Commands A compound command is one of the following. In most cases a list in a command's description may be separated from the rest of the command by one…
Bash inline number increase (( ++i ))
i=0 (( ++i )) echo $i Will give 1
RHEL/Fedora auto apply updates (dnf/yum)
# dnf -y install dnf-automatic Last metadata expiration check: 2:07:13 ago on Tue Sep 27 06:13:59 2016. Dependencies resolved. =============================================================================================================================================================================================================================================================================================================================== Package Arch Version Repository Size =============================================================================================================================================================================================================================================================================================================================== Installing: dnf-automatic noarch 1.1.10-1.fc24…
Run programs without execute rights on file
/bin/bash script.sh /lib64/ld-linux-x86-64.so.2 binary.bin /usr/bin/php file.php
Fix broken yum database (DB_RUNRECOVERY)
error: rpmdb: BDB0113 Thread/process 633/140720390891328 failed: BDB1507 Thread died in Berkeley DB library error: db5 error(-30973) from dbenv->failchk: BDB0087 DB_RUNRECOVERY: Fatal error, run database recovery error: cannot open Packages index…
Bash keyboard shortcuts
Found here: http://ss64.com/bash/syntax-keyboard.html Bash Keyboard Shortcuts Moving the cursor: Ctrl + a Go to the beginning of the line (Home) Ctrl + e Go to the End of the line…
Reset HP/HPE iLO 4 password with CLI on Linux
File: Install hponcfg-4.6.0-0.x86_64.rpm , get it here: http://h20564.www2.hpe.com/hpsc/swd/public/detail?swItemId=MTX_5ab6295f49964f16a699064f29 . Not available anymore? I made a base64 version of the thing here: http://pastebin.com/raw/XQyXBdCg . Run hponcfg -f pass.xml .
Self extracting zipped encrypted linux package
#!/bin/bash T=`mktemp -d /tmp/$$XXXX`;trap "rm -rf $T" EXIT SIGINT; tail -n+3 $0|openssl enc -d -aes-256-cbc|tar zx -C $T;C=`pwd`; cd $T;./_;cd $C;exit 0 build: #!/bin/bash find . -name "*~" -delete TMP=`mktemp…
Fix rpm/yum database (BDB0087 DB_RUNRECOVERY: Fatal error, run database recovery)
$ sudo yum update error: rpmdb: BDB0113 Thread/process 11565/140378074454016 failed: BDB1507 Thread died in Berkeley DB library error: db5 error(-30973) from dbenv->failchk: BDB0087 DB_RUNRECOVERY: Fatal error, run database recovery error:…
RHEL replace rsyslog with rsyslog7 without clearing dependencies
You want to install rsyslog7 but you get: Error: rsyslog7 conflicts with rsyslog-5.8.10-10.el6_6.x86_64 So you choose to erase/remove rsyslog first, but this removes: cronie, cronie-anacron, crontabs, redhat-lsb, redhat-lsb-compat, redhat-lsb-core, redhat-lsb-graphics,…
Nagios, nrpe and selinux policies (audit)
Selinux seems to “dontaudit” logs by default. This means that when selinux is permissive, your plugins will work, and when you setenforce 1 your server, plugins fail. This all happens…
Bash percentage calculate snippet
MEMLINE=$( tac $MGRBASE/$REL_LOGLOC/server.status.log | egrep -m1 '\*\*.*Memory Status:' ) USED=$( echo "$MEMLINE" | egrep -o '+ MB Used' | sed 's/\..*//;s/,//' ) MAX=$( echo "$MEMLINE" | egrep -o '+ MB…
Bash file age check snippet
if ]; then #Check age if ]; then echo "Backup takes too long" else echo "Doing backup" fi fi
Fix requested NFS version or transport protocol is not supported
I got this on RHEL 6: requested NFS version or transport protocol is not supported Restarting the NFS daemon fixed this. Guess some libraries were updated. Haven’t taken the time…
Set hostname RHEL7
Setting hostname via /etc/sysconfig/network does not seem to work anymore. Instead use hostnamectl set-hostname hostname.domain.
Cron headers unix / linux
Compact: #.---------------- min (0-59) #| .------------- hr (0-23) #| | .---------- dom (1-31) #| | | .------- mon (1-12) #| | | | .---- dow (0-7|mon-sun0) #| | | |…
Delete old yum/rpm packages from repository (reposync)
repomanage -k2 --old /data/repo/data/el-6-epel | xargs rm -f
[FIX] The GPG keys listed for the “*” repository are already installed but they are not correct for this package.
I got: Retrieving key from file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release The GPG keys listed for the "RHEL6 Server" repository are already installed but they are not correct for this package. Check that the correct…
[FIX] Clean up old puppet reports and reclaim mysql space (ibdata)
MySQL for puppet dashboard gets BIG. You can make this smaller by deleting old records. Source for this article is here. To get the size in GB of the dashboard:…
[FIX] vfs unable to mount root fs unknown-block
A RHEL update today fucked up a RHEL system, giving: “vfs unable to mount root fs unknown-block”. Fix: Boot from RHEL CD Choose rescue mode Start (with network) Type: chroot…
Bash get full path of file
Get the full path of a file via: $ readlink -f ./file Tip: make an alias: alias fullpath='readlink -f'
Dell Linux Dock display switcher script
This might be helpful for someone. A quick script I made for changing output modes on my Dell laptop. There are different configurations. laptop: laptop screen only vga: vga output…