I have installed docker-compose using the command
sudo apt install docker-compose
It installed docker-compose version 1.8.0 and build unknown
I need the latest version of docker-compose or at least a version of 1.9.0
Can anyone please let me know what approach I should take to upgrade it or uninstall and re-install the latest version.
I have checked the docker website and can see that they are recommending this to install the latest version'
sudo curl -L https://github.com/docker/compose/releases/download/1.21.0/docker-compose-$(uname -s)-$(uname -m) -o /usr/local/bin/docker-compose
But before that, I have to uninstall the present version, which can be done using the command
sudo rm /usr/local/bin/docker-compose
but this can be used only when the installation was done using curl. I am not sure if the installation was done by curl as I have used
sudo apt install docker-compose
Please let me know what should I do now to uninstall and re-install the docker-compose.
First, remove the old version:
If installed via apt-get
sudo apt-get remove docker-compose
If installed via curl
sudo rm /usr/local/bin/docker-compose
If installed via pip
pip uninstall docker-compose
Then find the newest version on the release page at GitHub or by curling the API and extracting the version from the response using grep or jq (thanks to dragon788, frbl, and Saber Hayati for these improvements):
# curl + grep
VERSION=$(curl --silent https://api.github.com/repos/docker/compose/releases/latest | grep -Po '"tag_name": "\K.*\d')
# curl + jq
VERSION=$(curl --silent https://api.github.com/repos/docker/compose/releases/latest | jq .name -r)
Finally, download to your favorite $PATH-accessible location and set permissions:
DESTINATION=/usr/local/bin/docker-compose
sudo curl -L https://github.com/docker/compose/releases/download/${VERSION}/docker-compose-$(uname -s)-$(uname -m) -o $DESTINATION
sudo chmod 755 $DESTINATION
The easiest way to have a permanent and sustainable solution for the Docker Compose installation and the way to upgrade it, is to just use the package manager pip with:
pip install docker-compose
I was searching for a good solution for the ugly "how to upgrade to the latest version number"-problem, which appeared after you´ve read the official docs - and just found it occasionally - just have a look at the docker-compose pip package - it should reflect (mostly) the current number of the latest released Docker Compose version.
A package manager is always the best solution if it comes to managing software installations! So you just abstract from handling the versions on your own.
If you tried sudo apt-get remove docker-compose and get E: Unable to locate package docker-compose, try this method :
This command must return a result, in order to check it is installed here :
ls -l /usr/local/bin/docker-compose
Remove the old version :
sudo rm -rf docker-compose
Download the last version (check official repo : docker/compose/releases) :
sudo curl -L "https://github.com/docker/compose/releases/download/1.24.0/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
(replace 1.24.0 if needed)
Finally, apply executable permissions to the binary:
sudo chmod +x /usr/local/bin/docker-compose
Check version :
docker-compose -v
If the above methods aren't working for you, then refer to this answer: https://stackoverflow.com/a/40554985
curl -L "https://github.com/docker/compose/releases/download/1.22.0/docker-compose-$(uname -s)-$(uname -m)" > ./docker-compose
sudo mv ./docker-compose /usr/bin/docker-compose
sudo chmod +x /usr/bin/docker-compose
Based on #eric-johnson's answer, I'm currently using this in a script:
#!/bin/bash
compose_version=$(curl https://api.github.com/repos/docker/compose/releases/latest | jq .name -r)
output='/usr/local/bin/docker-compose'
curl -L https://github.com/docker/compose/releases/download/$compose_version/docker-compose-$(uname -s)-$(uname -m) -o $output
chmod +x $output
echo $(docker-compose --version)
it grabs the latest version from the GitHub api.
Here is another oneliner to install the latest version of docker-compose using curl and sed.
curl -L "https://github.com/docker/compose/releases/download/`curl -fsSLI -o /dev/null -w %{url_effective} https://github.com/docker/compose/releases/latest | sed 's#.*tag/##g' && echo`/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose && chmod +x /usr/local/bin/docker-compose
Do it in three steps. (showing for apt-get installs)
Uninstall the last one. e.g. for apt-get installs
sudo apt-get remove docker-compose
Install the new one (https://docs.docker.com/compose/install/)
sudo curl -L "https://github.com/docker/compose/releases/download/1.29.0/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
and then
sudo chmod +x /usr/local/bin/docker-compose
Check your version
docker-compose --version
Simple Solution to update docker-compose
This will remove the existing binary of docker-compose and install a new version.
sudo cd /usr/local/bin && sudo rm -rf docker-compose
sudo sudo curl -SL https://github.com/docker/compose/releases/download/v2.2.3/docker-compose-linux-x86_64 -o /usr/local/bin/docker-compose
sudo chmod +x docker-compose
for the latest version visit https://github.com/docker/compose/releases and replace the latest one with v2.1.1
I was trying to install docker-compose on "Ubuntu 16.04.5 LTS" but after installing it like this:
sudo curl -L "https://github.com/docker/compose/releases/download/1.26.0/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
I was getting:
-bash: /usr/local/bin/docker-compose: Permission denied
and while I was using it with sudo I was getting:
sudo: docker-compose: command not found
So here's the steps that I took and solved my problem:
sudo curl -L "https://github.com/docker/compose/releases/download/1.26.0/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
sudo ln -sf /usr/local/bin/docker-compose /usr/bin/docker-compose
sudo chmod +x /usr/bin/docker-compose
use this from command line: sudo curl -L "https://github.com/docker/compose/releases/download/1.22.0/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
Write down the latest release version
Apply executable permissions to the binary:
sudo chmod +x /usr/local/bin/docker-compose
Then test version:
$ docker-compose --version
If you installed with pip, to upgrade you can just use:
pip install --upgrade docker-compose
or as Mariyo states with pip3 explicitly:
pip3 install --upgrade docker-compose
Using latest flag in url will redirect you to the latest release of the repo
As OS name is lower case in github's filename, you should convert uname -s to lower case using sed -e 's/\(.*\)/\L\1/'.
sudo curl -L "https://github.com/docker/compose/releases/latest/download/docker-compose-$(uname -s|sed -e 's/\(.*\)/\L\1/')-$(uname -m)" -o /usr/local/bin/docker-compose && sudo chmod +x /usr/local/bin/docker-compose
On mac (also working on ubuntu):
sudo curl -L "https://github.com/docker/compose/releases/download/<release-version>/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
sudo chmod +x /usr/local/bin/docker-compose
NOTE: write the as here:
https://github.com/docker/compose/releases
Use,
$ sudo curl -L "https://github.com/docker/compose/releases/download/1.24.0/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose && sudo chmod +x /usr/local/bin/docker-compose
$ docker-compose -v
Docker Engine and Docker Compose Plugin
Since Microsoft took over Docker they worked on porting docker-compose to their Docker Engine CLI plugins. For future support and updates I would recommend using docker compose plugin (Notice the missing dash) which can be install via the docker-compose-plugin package. The following instructions assume that you are using Ubuntu as Distro or any Distro thats using apt as package manager.
Installation Preparations
Update your mirrors:
sudo apt-get update
Make sure the following packages are installed:
sudo apt-get install \
ca-certificates \
curl \
gnupg \
lsb-release
After that add the official Docker GPG Key:
sudo mkdir -p /etc/apt/keyrings
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg
And finally add the the stable repository:
echo \
"deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu \
$(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
Also make sure Docker Engine and other needed dependencies are installed:
sudo apt-get install docker-ce docker-ce-cli containerd.io
Installation of docker compose plugin
sudo apt-get install docker-compose-plugin
Any future updates of the plugin are easily applied via apt.
For further reference take a look at the official installation instructions of Docker Engine and Docker Compose.
After a lot of looking at ways to perform this I ended up using jq, and hopefully I can expand it to handle other repos beyond Docker-Compose without too much work.
# If you have jq installed this will automatically find the latest release binary for your architecture and download it
curl --silent "https://api.github.com/repos/docker/compose/releases/latest" | jq --arg PLATFORM_ARCH "$(echo `uname -s`-`uname -m`)" -r '.assets[] | select(.name | endswith($PLATFORM_ARCH)).browser_download_url' | xargs sudo curl -L -o /usr/local/bin/docker-compose --url
On ubuntu desktop 18.04.2, I have the 'local' removed from the path when using the curl command to install the package and it works for me. See above answer by Kshitij.
In my case, using Windows + WSL2 with Ubuntu 20.04, was necessary only this:
sudo apt update
and then:
sudo apt upgrade
Centos/RHEL
Follow my answer below if you're using Centos7 with an x86-64 architecture. This answer is also available in my github.
Stop Your Docker Containers
I noticed other answers did not talk about stopping your docker containers/images instances before attempting to upgrade gracefully. Assumptions are inevitable but can be costly. Onward we go!
Options to update Docker-Compose
There are 2 options to upgrade docker-compose if you first downloaded and installed docker-compose using the Curl command.
Using Curl, jq package, and Github's direct URL to the docker-compose repository.
Using Curl, Sed, and Github's direct URL to the docker-compose repository.
Note: some of the commands below require "sudo" privileges.
Demonstration
The script below was saved to a file called "update_docker_compose.sh". You need to give this file executable permissions.
Like so:
chmod +x update_docker_compose.sh
"docker_docker_compose.sh" file content:
#!/bin/bash
# author: fullarray (stackoverflow user)
# Contribution shared on: stackoverflow.com
# Contribution also available on: github.com
# date: 06112022
# Stop current docker container running
docker stop containerID
# Remove current docker network running
docker rm containerID
# Remove image of target application(s)
docker image rm imageID
# Delete either dangling (unatagged images) docker containers or images or network
docker system prune -f
# This step depends on the jq package.
# Uncomment jq package installation command below if using Centos7 x86-64.
# sudo yum install jq
# Declare variable to get latest version of docker-compose from github repository
compose_version=$(curl https://api.github.com/repos/docker/compose/releases/latest | jq .name -r)
# Declare variable to target installation directory
target_install_dir='/usr/local/bin/docker-compose'
# Get OS and build (assumes Linux Centos7 and x86_64)
get_local_os_build=$(uname -s)-$(uname -m)
# Execute curl command to carry download and installation operation
curl -L https://github.com/docker/compose/releases/download/$compose_version/docker-compose-$get_local_os_build -o $target_install_dir
# Use chmod to modify permissions to target installation directory (to make it executable)
chmod +x $target_install_dir
# Print docker-compose version to terminal to verify upgrade
$(docker-compose --version)
Edit the script with variables specific to your environment
The script above has a few variables you need to edit with values specific to your docker environment. For instance, you need to replace container ID and image ID with the values that the following commands output.
docker ps
and
docker images output
Once you finalize creating the file (including the edits). Switch to the directory that contains the file. For example, if you created the file in /home/username/script/update_docker_compose.sh
cd /home/username/script
Last, run the script by executing the following
./update_docker_compose.sh
Option 2
Create a script file name "update_docker_compose.sh"
Edit the file and add the following content:
#!/bin/bash
# author: fullarray (stackoverflow user)
# Contribution shared on: stackoverflow.com
# Contribution also available on: github.com
# date: 06112022
# Stop current docker container running
docker stop containerID
# Remove current docker network running
docker rm containerID
# Remove image of target application(s)
docker image rm imageID
# Delete either dangling (unatagged images) docker containers or images or network
docker system prune -f
# Declare variable to target installation directory
target_install_dir='/usr/local/bin/docker-compose'
# Get OS and build (assumes Linux Centos7 and x86_64)
get_local_os_build=$(uname -s)-$(uname -m)
# Execute curl and sed command to carry out download and installation operation
# compose_latest_version=$(curl -L "https://github.com/docker/compose/releases/download/`curl -fsSLI -o /dev/null -w %{url_effective} https://github.com/docker/compose/releases/latest | sed 's#.*tag/##g' && echo`/docker-compose-$get_local_os_build") -o $target_install_dir
# Use chmod to modify permissions to target installation directory (to make it executable)
chmod +x $target_install_dir
# Print docker-compose version to terminal to verify upgrade
$(docker-compose --version)
Edit the script with variables specific to your environment
The script above also has a few variables you need to edit with values specific to your docker environment. For instance, you need to replace container ID and image ID with the values that the following commands output.
docker ps
and
docker images output
Once you finalize creating the file (including the edits). Switch to the directory that contains the file. For example, if you created the file in /home/username/script/update_docker_compose.sh
cd /home/username/script
Last, run the script by executing the following
./update_docker_compose.sh
This is the method of installing docker compose version 2.12.x
Update debian package manager
# apt-get update
# apt-get install docker-compose-plugin
Then install the plugin manualy
DOCKER_CONFIG=${DOCKER_CONFIG:-$HOME/.docker}
mkdir -p $DOCKER_CONFIG/cli-plugins
curl -SL https://github.com/docker/compose/releases/download/v2.12.2/docker-compose-linux-x86_64 -o $DOCKER_CONFIG/cli-plugins/docker-compose
Give permisson of execution of file
chmod +x $DOCKER_CONFIG/cli-plugins/docker-compose
Last test the installation
docker compose version
// Docker Composer Version v2.12.2
If you have homebrew you can also install via brew
$ brew install docker-compose
This is a good way to install on a Mac OS system
Most of these solutions are outdated or make you install old version.
To install the latest
sudo apt install jq
DOCKER_COMPOSE_VERSION=$(curl --silent https://api.github.com/repos/docker/compose/releases/latest | jq .name -r)
sudo curl -L "https://github.com/docker/compose/releases/download/$DOCKER_COMPOSE_VERSION/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
sudo chmod +x /usr/local/bin/docker-compose
Well, my case was pretty weird. I am using wsl2, and Docker Desktop (Windows 11). I stop getting this error after rename the folder "docker" to "config-dev-server" and update de Dockerfile like this this:
COPY ./docker/apache/apache2.conf /etc/apache2/apache2.conf
to
COPY ./config-dev-server/apache/apache2.conf /etc/apache2/apache2.conf
With a newer Docker Desktop for Mac 3.3.0, you don't need to install Docker Compose as a seperate package. Docker Compose comes as a first class citizen installed with Docker by default. Check out the below CLI:
docker compose version
Docker Compose version 2.0.0-beta.1%
I'm trying to run 3 services at my container startup (snmpd, sshd and centengine)
As runlevel is unknown in the container, services won't start.
I built an image with this Dockerfile :
FROM centos:6.7
MAINTAINER nael <me#mail>
# Update CentOS
RUN yum -y update
# Install wget
RUN yum install -y wget
# Get Centreon Repo
RUN wget http://yum.centreon.com/standard/3.0/stable/ces-standard.repo -O /etc/yum.repos.d/ces-standard.repo
# Install Packages (SSH, sudo, Centreon Poller & Engine, SNMP)
RUN yum install -y --nogpgcheck openssh-clients openssh-server centreon-poller-centreon-engine sudo net-snmp net-snmp-utils
# Install supervisord
RUN rpm -Uvh http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
RUN yum --enablerepo=epel install -y supervisor
RUN mv -f /etc/supervisord.conf /etc/supervisord.conf.org
ADD supervisord.conf /etc/
# For sshd & centengine
EXPOSE 22 5669
# Change user password
RUN echo -e "password" | (passwd --stdin user)
# Disable PAM (causing issues while ssh login)
RUN sed -ri 's/UsePAM yes/#UsePAM yes/g' /etc/ssh/sshd_config
RUN sed -ri 's/#UsePAM no/UsePAM no/g' /etc/ssh/sshd_config
# Start supervisord
CMD ["/usr/bin/supervisord"]
Here is the supervisord.conf file
[supervisord]
nodaemon=true
pidfile=/var/run/supervisord.pid
logfile=/var/log/supervisor/supervisord.log
[program:centengine]
command=service centengine start
[program:snmpd]
command=service snmpd start
[program:sshd]
command=service sshd start
But with this Dockerfile and supervisord.conf, when I start my container theses services aren't running.
What could be the problem ?
Not anymore using supervisord.
I just include a script with all the services ... start commands in the Dockerfile. When I create my container with docker run ... I just specify that I want to start it with my script.
& that's working very well.
Thanks #warmoverflow for trying to solve this.
You may find my dockerfy utility useful starting services, pre-running initialization commands before the primary command starts. See https://github.com/markriggins/dockerfy
For example:
RUN wget https://github.com/markriggins/dockerfy/releases/download/0.2.4/dockerfy-linux-amd64-0.2.4.tar.gz; \
tar -C /usr/local/bin -xvzf dockerfy-linux-amd64-*tar.gz; \
rm dockerfy-linux-amd64-*tar.gz;
ENTRYPOINT dockerfy
COMMAND --start bash -c "while false; do echo 'Ima Service'; sleep 1; done" -- \
--reap -- \
nginx
Would run a bash script as a service, echoing "Ima Service" every second, while the primary command nginx runs. If nginx exits, then the "Ima Service" script will automatically be stopped.
As an added benefit, any zombie processes left over by nginx will be automatically cleaned up.
You can also tail log files such as /var/log/nginx/error.log to stderr, edit nginx's configuration prior to startup and much more
this is a tutorial to install webacula 7 (after bacula 7 with mysql)
this is the tutorial for centos+bcula that i used (without webmin section)
http://www.backupcentral.com/phpBB2/two-way-mirrors-of-external-mailing-lists-3/bacula-25/howto-install-bacula-7-on-centos-7-fresh-install-126395/
Then to install webacula:
yum install httpd php php-mysql php-gd
wget http://downloads.sourceforge.net/project/webacula/webacula/7.0.0/webacula-7.0.0.tar.gz?r=http%3A%2F%2Fsourceforge.net%2Fprojects%2Fwebacula%2F%3Fsource%3Dtyp_redirect&ts=1429012567&use_mirror=garr
(download webacula 7.0.0)
yum install httpd php php-mysql
tar -xzvf /root/webacula-7.0.0.tar.gz\?r\=http...
mv webacula-7.0.0 /var/www/
mv /var/www/webacula-7.0.0/ /var/www/webacula
chown -R root.root .
chown apache.apache cache
groupadd bacula
usermod -aG bacula apache
chgrp bacula /usr/sbin/bconsole
/etc/bacula/bconsole.conf
chgrp bacula /etc/bacula/bconsole.conf
cd ../application
nano config.ini
update:
bacula.bconsole = "/usr/sbin/bconsole"
bacula.bconsolecmd = "-n -c /etc/bacula/bconsole.conf"
nano /etc/sudoers
comment:
# Defaults requiretty
nano /etc/bacula/bconsole.conf
update:
Password = "YOUR PASS"
nano /etc/selinux/config
update:
SELINUX=disabled
nano /etc/sudoers.d/apache
add:
apache ALL=NOPASSWD: /usr/sbin/bconsole
reboot (because the selinux)
check with this command:
su -l apache -s /bin/sh -c "/usr/bin/sudo /usr/sbin/bconsole -n -c /etc/bacula/bconsole.conf"
normal respons :
Connecting to Director localhost:9101
1000 OK: 1 bacula-dir Version: 7.0.5 (28 July 2014)
Enter a period to cancel a command.
*quit
cd /var/www/webacula/install/apache/
cp webacula.conf /etc/httpd/conf.d/webacula.conf
nano /etc/httpd/conf.d/webacula.conf
update:
Alias /webacula /usr/share/webacula/html
<Directory /usr/share/webacula/html>
...
Deny from all
to:
Alias /webacula /var/www/webacula/html
<Directory /var/www/webacula/html>
...
Allow from all
nano /var/www/webacula/application/config.ini
update your db pass
nano /etc/bacula/bacula-dir.conf
update :
catalog = all, !skipped, !saved
cd /var/www/webacula/install
./password-to-hash.php your bacula webming pass
take ther respons and put in:
nano db.conf
update:
db_pwd="your root mysql pass"
....
webacula_root_pwd="your res from ./password-to-hash.php"
cd MySql/
./10_make_tables.sh
./20_acl_make_tables.sh
systemctl restart httpd
add Zend to webacula:
cd /var/www/webacula/library
wget https://packages.zendframework.com/releases/ZendFramework-1.12.3/ZendFramework-1.12.3-minimal.tar.gz (download only ver 1.12.3!!!!!!)
tar -xzf ZendFramework-1.12.3-minimal.tar.gz
mkdir Zend
cp -Rf ZendFramework-1.12.3-minimal/library/Zend/* Zend/.
go to website :)
now we finished but for me the root password did not work, so to fix this i did:
mysql -uroot -p
use bacula;
update webacula_users set email='your email here';
go to website and reset password
I am trying to install haproxy on my centos 6.5 server. I am using the command
yum install haproxy
This command installs a version 1.4.x. I have also looked at the following links, but could not get it to work
http://virtuallyhyper.com/2013/05/configure-haproxy-to-load-balance-sites-with-ssl/
http://blog.haproxy.com/2012/09/10/how-to-get-ssl-with-haproxy-getting-rid-of-stunnel-stud-nginx-or-pound/
https://github.com/bluerail/haproxy-centos
how do i install it?
You can build the RPM as follows:
mkdir -p rpmbuild/{BUILD,RPMS,SOURCES,SPECS,SRPMS}
sudo yum -y install pcre-devel openssl-devel
cd rpmbuild/SOURCES
curl -L -O http://www.haproxy.org/download/1.5/src/haproxy-1.5.3.tar.gz
tar zxf haproxy-1.5.3.tar.gz
cd ..
cp -p SOURCES/haproxy-1.5.3/examples/haproxy.spec SPECS/haproxy153.spec
sed -i 's/Release: .*/Release: %{?_release:%{_release}}%{!?_release:1}/' SPECS/haproxy153.spec
sed -i 's/USE_PCRE=1 /USE_PCRE=1 USE_OPENSSL=1 USE_ZLIB=1 /' SPECS/haproxy153.spec
rpmbuild --define "_topdir `pwd`" --define "_release 2" -bb SPECS/haproxy153.spec
(I use a local directory and set the release number otherwise it is the same as http://qiita.com/uemura/items/e822c1ed505b9fe0208f)
Install
scp RPMS/x86_64/haproxy-1.5.3-2.x86_64.rpm root#somewhere:~/
somewhere# yum localinstall ~/haproxy-1.5.3-2.x86_64.rpm
You could install from source using one of these tar bundles:
http://www.haproxy.org/download/1.5/src/
You will probably need to install the following bundles to compile from source:
yum openssl-devel pcre-devel make gcc
Here's also a script which I presume would work on your environment
I went through fair amount of google search to install ack-grep on CentOS but I didn't find anything help. I also looked for the source codes but couldn't find it neither. Does anyone know how to install it on the OS?
Thanks a lot.
Could be essentially the same as https://stackoverflow.com/a/23155007/35946 but on CentOS 6.7 the answer is:
# yum install epel-release
# yum install ack
if you don't have the root permission, you can do as follows:
$ curl https://beyondgrep.com/ack-2.22-single-file > ~/bin/ack && chmod 0755 !#:3
or you can change to root user:
$ sudo su
# curl https://beyondgrep.com/ack-2.22-single-file > /bin/ack && chmod 0755 !#:3
You can get it from the EPEL software repository.
From the EPEL FAQ:
For EL5:
su -c 'rpm -Uvh http://download.fedoraproject.org/pub/epel/5/i386/epel-release-5-4.noarch.rpm'
...
su -c 'yum install ack'
For EL6:
su -c 'rpm -Uvh http://download.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm'
...
su -c 'yum install ack'
Go to Beyond Grep and look at the section titled
Install The ack executeable
curl http://beyondgrep.com/ack-2.14-single-file > ~/bin/ack && chmod 0755 !#:3
And replace ack.2.14 with the current version of ack.
You may need to create the directory mkdir ~/bin/ first. You may
also need to modify ~/.bashrc to include this new path E.G.:
PATH=$PATH:$HOME/bin
Then reload ~/.bashrc
source ~/.bashrc
Test the installation by running ack:
rpm -qa | ack s
This should display any installed packages containing the letter s. (some linux distributions may use ack-grep as the command.
How did you try installing it? Are you using yum? The package is probably not called "ack-grep", but just "ack".
The name "ack-grep" is a Debian-specific thing because there was already a package called "ack", so they called it "ack-grep" instead. That was years ago and now they're dropping the original "ack" package and renaming "ack-grep" to "ack".
For RedHat Enterprise just do sudo yum install ack