From 56c6f8bbb212ab508c9e53e6a0cd495c2a68142d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fabiano=20Fid=C3=AAncio?= <ffidencio@nvidia.com>
Date: Tue, 21 Apr 2026 18:38:02 +0200
Subject: [PATCH] docs: Fix shellcheck issues in offline_cpu.sh
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Fix shellcheck warnings and notes identified by running
shellcheck --severity=style.

Signed-off-by: Fabiano Fidêncio <ffidencio@nvidia.com>
---
 docs/how-to/offline_cpu.sh | 22 +++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)

diff --git a/docs/how-to/offline_cpu.sh b/docs/how-to/offline_cpu.sh
index 78fe24bbfe..5fb0813570 100644
--- a/docs/how-to/offline_cpu.sh
+++ b/docs/how-to/offline_cpu.sh
@@ -5,19 +5,19 @@
 #
 # Description: Offline SOS CPUs except BSP before launch UOS
 
-[ $(id -u) -eq 0 ] || { echo >&2 "ERROR: run as root"; exit 1; }
+[[ $(id -u) -eq 0 ]] || { echo >&2 "ERROR: run as root"; exit 1; }
 
-for i in $(ls -d /sys/devices/system/cpu/cpu[1-9]*); do
-        online=`cat $i/online`
-        idx=`echo $i | tr -cd "[0-9]"`
-        echo "INFO:$0: cpu$idx online=$online"
-        if [ "$online" = "1" ]; then
-                echo 0 > $i/online
-                while [ "$online" = "1" ]; do
+for i in /sys/devices/system/cpu/cpu[1-9]*; do
+        [[ -e "${i}/online" ]] || continue
+        online=$(cat "${i}/online")
+        idx=$(echo "${i}" | tr -cd "0-9")
+        echo "INFO:$0: cpu${idx} online=${online}"
+        if [[ "${online}" = "1" ]]; then
+                echo 0 > "${i}/online"
+                while [[ "${online}" = "1" ]]; do
                         sleep 1
-                        echo 0 > $i/online
-                        online=`cat $i/online`
+                        echo 0 > "${i}/online"
+                        online=$(cat "${i}/online")
                 done
         fi
 done
-