Bash (and sed) scripts I've written to help with small tasks.
classip is a IPv4 class information tool. It can print out information about class, public/private, and special IP ranges. Additionally, it can tell you more class information about a given IP address.
--- usage
Usage: classip [OPTION]... [IP ADDRESS]...
Options:
-h, --help Show this help menu
-c Show all IP class ranges
-r Show all private IP ranges
-s Show all special IP ranges
--- examples
classip -c
print all classful IP ranges.
classip -r 192.168.86.4
print all classful private IP ranges, and describe the IP address 192.168.86.4.
classip -rcs 10.10.10.3 1.2.3.4 169.254.0.24
print all information, and describe all IP address entered as arguments.
gitstat finds all git repositories in your current directory, or under a specified directory. It prints the output of the git status command for each repository found.
--- usage
Usage: gitstat [OPTION]...
Options:
-h, --help Show this help menu
-d DIR Specify the top level directory to search from
-i DIR Ignore a specific directory from results (repeatable)
-l Only list git repos, and skip default action
--- examples
gitstat
run the command in your pwd.
gitstat -d /opt
run the command in "/opt".
gitstat -i .emacs.d/
run the command in your pwd and ignore ".emacs.d/".
gitstat -d ~ -i ~/.emacs.d -i ~/tmp
run the command in your home directory, ignoring ~/.emacs.d and ~/tmp.
gitstat -l -i tmp/
run the command to just list git directories, ignoring any directories under ./tmp/
notifbk is a companion script for notif.el that creates and manages backups of your notif directory. It can create a compressed archive and optionally rotate old notif backup archives. By default, it uses the default notif-directory value of $HOME/notes.
This script is very much written in a way that is specific to my use case; so, if you do use this script, you may need to edit it to change some variables such as $notif_directory, compression method, naming scheme, etc.
--- usage
Usage: notifbk -d DIR [OPTION]...
Options:
-h, --help Show this help menu
-d DIR The directory where to save your backup
-k NUM When rotating old backups:
- The NUM most recent backups to keep
-r Rotate backups only (will not create a backup)
--- examples
notifbk -d ~/Backups
create a backup of notif directory and place the archive in ~/Backups
notifbk -d /mnt/backup_drive/notes -k 5
create a backup of notif directory, place the archive in /mnt/backup_drive/notes, and rotate notif backups by keeping only the 5 most recent backups
notifbk -d /backups -k 10 -r
do not create a new backup, but rotate the notif backups in /backups, keeping the 10 most recent backups
oneshot allows you to run a command against a list of remote hosts.
! Exercise caution when using this script. In general, it should only be used to gather basic information from a list of remote servers.
A "hostlist" is required to use oneshot. It must be line-break separated. It will read every line that is not blank, and does not start with a # or [.
Functionally, this script assumes that you have key-based authentication for ssh.
--- usage
Usage: oneshot [OPTION]... FILE "COMMAND"
Options:
-h, --help Show this help menu
-a Show output in 'view' format, with line-breaks
-c Show output in CSV format HOSTNAME,OUTPUT
-t FILE Conduct a ssh connection test against <hostfile>
-u USER Specify SSH username
--- examples
oneshot ~/hostlist.txt "cat .bashrc"
ssh to each hosts in "~/hostlist.txt" and run the command cat .bashrc.
oneshot -a /var/tmp/hostlist.txt "ls -ltr /var/log"
ssh to each hosts in "/var/tmp/hostlist.txt" and run the command ls -ltr /var/log. Output in a pretty format.
oneshot -c -u admin hostlist "uname -r"
ssh to each host in "./hostlist" as the user "admin" and run the command uname -r. Output in a CSV format.
oneshot -c -u larry /tmp/hostlist "grep -i 'pretty' /etc/os-release | cut -d '=' -f2 | tr -d '\"'" | tee output.csv
ssh to each host in "/tmp/hostlist" as the user "larry" and run the command grep -i 'pretty' /etc/os-release | cut -d '=' -f2 | tr -d '"' while using tee to write the output to the file "output.csv" and to your terminal. Notice the escape character before the double-quote within the command.
oneshot -t ../hostlist
run the ssh "test" against ../hostlist. You will automatically add new hosts' public keys to your ~/.ssh/known_hosts file, and you will get a warning if a key has changed. Use this option to verify connectivity and/or conduct ssh related troubleshooting.
s-n2c is a sed script that converts line-breaks ('\n') into commas. It can be used to convert a file of entries separated by line-breaks into a comma-separated line.
--- example
$ cat fruits
banana
strawberry
cherry
blueberry
$ s-n2c fruits
banana,strawberry,cherry,blueberry
s-noco is a sed scrip that prints text without comments (# and ;) and blank lines. It could be helpful to quickly view the variables of large Unix configuration files that contain many comments, like squid.conf or sshd.conf.
--- examples
$ cat fruits
# Donkey Kong's favorite fruit
banana
# mind the empty line above
strawberry
# s-noco is aware of possible leading whitespace
cherry
; a comment made with a semi-colon... named!
blueberry
$ s-noco fruits
banana
strawberry
cherry
blueberry