Cybersecurity Triage

Read-only, sensitive output

Redact Secret-Looking Log Lines

Logs may contain token, password, secret, or bearer values and you need a safer view before sharing snippets.

Command

grep -RInEi '(password|token|secret|authorization)' fixtures/incidents | sed -E 's/((password|token|secret)[[:space:]]*[:=])[[:alnum:]_.-]+/\1REDACTED/Ig; s/([Aa]uthorization[[:space:]]*:[[:space:]]*[Bb]earer[[:space:]]+)[[:alnum:]_.-]+/\1REDACTED/g'

Before you run this

System impact: Read-only. Output may expose users, paths, tokens, keys, IPs, process arguments, or log details.

When not to use it: Do not treat this as complete DLP; tune patterns for your real secret formats and still review output.

Expected output

Matching log lines with sensitive-looking values replaced by REDACTED.

System impact

Read-only, sensitive output. Nothing changes. The command prints matching lines with secret-looking values redacted.

Recovery / rollback: no state is changed.

When to use it

Use before pasting incident log snippets into tickets, chat, or reports.

When not to use it

Do not treat this as complete DLP; tune patterns for your real secret formats and still review output.

Watch this command run

Command transcript

This sanitized transcript shows the commands and output shape without exposing host details.

demo@lab:~$

$ ls sample-files/incidents

app.log
deploy.log
kernel.journal
system.journal

sample-files/incidents/app.log:10:2026-06-25T14:07:01Z level=WARN service=api request_id=req-108 msg=token=REDACTED should_be_redacted

View commands shown

These are the commands shown in the sanitized transcript.

Commands shown

ls fixtures/incidents
grep -RInEi '(password|token|secret|authorization)' fixtures/incidents | sed -E 's/((password|token|secret)[[:space:]]*[:=])[[:alnum:]_.-]+/\1REDACTED/Ig; s/([Aa]uthorization[[:space:]]*:[[:space:]]*[Bb]earer[[:space:]]+)[[:alnum:]_.-]+/\1REDACTED/g'

next steps

Related commands

Cybersecurity Triage Sensitive output

Find World-Readable Secret-Looking Files

The fastest secret audit starts with readable files that look like secrets.

find fixtures/perm-audit -type f -perm -0004 \( -iname '*secret*' -o -iname '*.env' -o -iname '*token*' -o -iname '*key*' \) -printf '%M %u:%g %p\n' | sort

Cybersecurity Triage Sensitive output

Count authorized_keys by User

authorized_keys is the practical SSH access list.

find fixtures/user-access-audit/home -path '*/.ssh/authorized_keys' -exec sh -c 'for f do user=$(basename "$(dirname "$(dirname "$f")")"); keys=$(grep -vc "^[[:space:]]*#" "$f"); printf "%s %s %s\n" "$user" "$keys" "$f"; done' sh {} + | sort

Cybersecurity Triage Can be slow

Review a Breakglass Account

Emergency accounts should be easy to find and hard to ignore.

grep -Rhn 'breakglass' fixtures/user-access-audit/etc fixtures/user-access-audit/home fixtures/user-access-audit/logs

Cybersecurity Triage Sensitive output

Review sudo Grants

Privilege paths should be visible before you remove or approve access.

awk -F: '$1=="sudo" {print "sudo group: " $4}' fixtures/user-access-audit/etc/group; grep -RhnE '^[^#].*ALL=' fixtures/user-access-audit/etc/sudoers fixtures/user-access-audit/etc/sudoers.d

Cybersecurity Triage Sensitive output

Show Successful Logins and sudo Use

Access reviews need both who logged in and who elevated privileges.

grep -E 'Accepted publickey|sudo:' fixtures/user-access-audit/logs/auth.log

Study mapping

Use this as independent command practice: read the notes, predict the output, then compare it with the example before using a real shell.

Redact Secret-Looking Log Lines

Before you run this

Expected output

System impact

When to use it

When not to use it

Command transcript

Commands shown

Related commands

Find World-Readable Secret-Looking Files

Count authorized_keys by User

Review a Breakglass Account

Review sudo Grants

Show Successful Logins and sudo Use

Useful for