Linux utils - Revision history

Piousbox: /* Find 10 largest files in a folder */

2025-12-02T19:08:25Z

‎Find 10 largest files in a folder

Piousbox at 19:24, 27 January 2025

2025-01-27T19:24:34Z

Piousbox: /* Disks, Storage */

2024-09-29T19:11:23Z

‎Disks, Storage

Piousbox at 17:00, 12 April 2024

2024-04-12T17:00:35Z

Piousbox: /* Reset Chef UI Password */

2024-04-12T16:59:12Z

‎Reset Chef UI Password

Piousbox: /* ubuntu vpn */

2024-04-12T16:58:16Z

‎ubuntu vpn

Piousbox: Piousbox moved page Utils to Linux utils

2024-04-12T16:57:52Z

Piousbox moved page Utils to Linux utils

Piousbox: /* Spotlight */

2024-04-12T16:57:21Z

‎Spotlight

Piousbox at 16:56, 12 April 2024

2024-04-12T16:56:53Z

Piousbox: /* Apache bench */

2024-04-12T16:56:23Z

‎Apache bench

@@ Line 37: / Line 37: @@
 For mac:
- du -a . | sort -n -r | head
+  find . -type f -exec du -h {} + | sort -rh | head -- -n 20
 Limit how much logs journalctl keeps:

@@ Line 11: / Line 11: @@
 * [[ Process Utils ]]
 * [[ xml ]]
 === Replace all occurrences of a string in a folder ===

@@ Line 101: / Line 101: @@
   dd if=/dev/urandom of=/var/log/mongodb/randomFile bs=1M count=200
 === Create a user ===
@@ Line 131: / Line 126: @@
 whereas useradd just creates the user
 === Delete files older than 5 days ===

@@ Line 1: / Line 1: @@
 = Utils =
 * [[ Git cheatsheet ]]
 * [[ IO Utils ]]
@@ Line 17: / Line 19: @@
   LC_ALL=C find . -type f -name "*.html" -exec sed -i '' "s/UA-47088821-3/UA-47088821-4/" {} +
 </pre>
 === Find 10 largest files in a folder ===
@@ Line 35: / Line 43: @@
   find . -name "*js" -print | grep -v node_modules | xargs cat | grep -v "^//" | grep -v "^$" | wc -l
 === cut after ag for shorter lines ===
@@ Line 42: / Line 48: @@
   ag <your-search-keyword> | cut -c-800
 === increase number of open files, file descriptors ===
@@ Line 57: / Line 61: @@
 Reload services after making changes, logout.
 === count open files ===
   lsof | wc -
@@ Line 64: / Line 69: @@
 === Set date ===
   sudo date --set "25 Sep 2013 15:00:00"
 === Get date in milliseconds ===
   date -d 2017-05-05 +%s
- /etc/systemd/system/multi-user.target.wants
+== Disks, Storage ==
-From: https://www.cyberciti.biz/faq/systemd-systemctl-view-status-of-a-service-on-linux/
+=== check disks on ubuntu ===
- systemctl status stockwatcher.service
+  sudo lsblk
-==== journalctl ====
+=== Mount a block device ===
-Example:
+From: https://www.digitalocean.com/community/tutorials/how-to-use-block-storage-on-digitalocean
-   sudo journalctl -u iro_alert_stocks.service -e
+   parted /dev/sda mklabel gpt
+  parted -a opt /dev/sda mkpart primary ext4 0% 100%
-== Disks, Storage ==
+  mkfs.ext4 /dev/sda
-=== check disks on ubuntu ===
+  mkdir -p /data
- sudo lsblk
+  '/dev/sda /data ext4 defaults,nofail,discard 0 2' | sudo tee -a /etc/fstab
-=== Mount a block device ===
+  mount -a
-From: https://www.digitalocean.com/community/tutorials/how-to-use-block-storage-on-digitalocean
- parted /dev/sda mklabel gpt
- parted -a opt /dev/sda mkpart primary ext4 0% 100%
- mkfs.ext4 /dev/sda
- mkdir -p /data
- '/dev/sda /data ext4 defaults,nofail,discard 0 2' | sudo tee -a /etc/fstab
- mount -a
 === Find large files ===

@@ Line 142: / Line 142: @@
   sudo iptables -t nat -A PREROUTING -p tcp -d 10.0.0.229 --dport 2270 -j DNAT --to-destination 10.0.1.224:22
   sudo iptables -t nat -A POSTROUTING -j MASQUERADE
 === Delete files older than 5 days ===

← Older revision	Revision as of 16:57, 12 April 2024
(No difference)

@@ Line 43: / Line 43: @@
 == S ==
 == System ==
 === increase number of open files, file descriptors ===

@@ Line 35: / Line 35: @@
   find . -name "*js" -print | grep -v node_modules | xargs cat | grep -v "^//" | grep -v "^$" | wc -l
 == C ==
 * [[ css ]]