DevOps
DevOps: retries, tunnels, certificates, DNS, cron, logs.
File aliases/ops.sh. Disable: export ALIASX_DISABLE="ops"
Run control
| Name | Runs | What it does | |
|---|
function retry {
[ "$#" -ge 2 ] || { echo "Usage: retry <times> <command> [args]" >&2; return 2; }
_n="$1"; _i=1; _w=1; shift
while :; do
"$@" && { unset _n _i _w; return 0; }
_rc=$?
[ "$_i" -ge "$_n" ] && { echo "retry: failed after $_n tries" >&2; unset _n _i _w; return "$_rc"; }
echo "retry: try $_i failed, waiting ${_w}s" >&2
sleep "$_w"; _i=$((_i + 1)); _w=$((_w * 2))
done
}
retry N CMD... | | run CMD up to N times, waiting 1s, 2s, 4s... between triesexample$ retry 3 curl -f localhost:8080/health
retry: try 1 failed, waiting 1s
ok | |
function every {
[ "$#" -ge 2 ] || { echo "Usage: every <seconds> <command> [args]" >&2; return 2; }
_s="$1"; shift
while :; do echo "── $(date +%H:%M:%S)"; "$@"; sleep "$_s"; done
}
every SEC CMD... | | run CMD every SEC seconds (watch without clearing)example$ every 5 kubectl get pods
── 10:31:02
NAME READY STATUS
api-7d9f8b-x2k4 1/1 Running | |
Remote
| Name | Runs | What it does | |
|---|
function tunnel {
[ "$#" -eq 3 ] || { echo "Usage: tunnel <local-port> <target:port> <user@jump-host>" >&2; return 2; }
echo "localhost:$1 → $2 via $3 (Ctrl-C to stop)"
ssh -N -L "$1:$2" "$3"
}
tunnel LOCALPORT TARGET:PORT USER@JUMP | | forward localhost:LOCALPORT through sshexample$ tunnel 5433 db.internal:5432 ali@bastion
localhost:5433 → db.internal:5432 via ali@bastion (Ctrl-C to stop) | |
Certificates
| Name | Runs | What it does | |
|---|
function certexp {
[ "$#" -eq 1 ] || { echo "Usage: certexp <host[:port]>" >&2; return 2; }
_h="${1%%:*}"; _p="${1##*:}"; [ "$_h" = "$_p" ] && _p=443
openssl s_client -connect "$_h:$_p" -servername "$_h" </dev/null 2>/dev/null | _aliasx_cert_report
unset _h _p
}
certexp HOST[:PORT] | | certificate subject, issuer and days until expiryexample$ certexp example.com
subject=CN=example.com
issuer=C=US, O=Let's Encrypt, CN=R11
notAfter=Dec 30 23:59:59 2026 GMT
days left: 89 | |
function certfile {
[ "$#" -eq 1 ] || { echo "Usage: certfile <file>" >&2; return 2; }
_aliasx_cert_report < "$1"
}
certfile FILE | | same report for a local .crt/.pem fileexample$ certfile /etc/ssl/certs/site.crt
subject=CN=site.local
notAfter=Oct 20 10:00:00 2026 GMT
days left: 18 ← renew soon | |
DNS and sockets
| Name | Runs | What it does | |
|---|
function dnscheck {
[ "$#" -ge 1 ] || { echo "Usage: dnscheck <name> [type]" >&2; return 2; }
for _r in "" 1.1.1.1 8.8.8.8; do
printf '%-9s %s\n' "${_r:-system}" "$(dig +short ${_r:+@$_r} "$1" "${2:-A}" | tr '\n' ' ')"
done
unset _r
}
dnscheck NAME [TYPE] | | compare answers from system, Cloudflare and Google DNSexample$ dnscheck api.example.com
system 93.184.215.14
1.1.1.1 93.184.215.14
8.8.8.8 93.184.215.14 | |
sockets | ss -tulpn | listening sockets with processes | Linux |
Cron and logs
| Name | Runs | What it does | |
|---|
crons | crontab -l | your cron jobs | needs crontab |
function logsize { find "${1:-/var/log}" -type f -exec du -k {} + 2>/dev/null | _aliasx_topsize 15; }
logsize [DIR] | | biggest log files (default /var/log)example$ logsize
812M /var/log/journal/system.journal
120M /var/log/nginx/access.log | |