bash_oneliners
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bash_oneliners [2015/10/08 12:31] – admin | bash_oneliners [2023/07/27 13:28] (current) – admin | ||
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- | * Remove offending key from known_hosts file with one swift move | + | * Whats my WAN IP? |
< | < | ||
- | $ sed -i 18d .ssh/ | + | dig +short myip.opendns.com @resolver1.opendns.com |
</ | </ | ||
- | * Whats my WAN IP? | + | * Find large files, print 10 largest files in dir |
+ | < | ||
+ | find . -printf '%s %p\n' | ||
+ | </ | ||
+ | * size of all files older than mtime | ||
+ | < | ||
+ | find . -mtime +7 -print0 | du -hc --files0-from - | tail -n 1 | ||
+ | </ | ||
+ | * To find the largest file in all sub-directories: | ||
+ | < | ||
+ | find . -type f -exec ls -s {} \; | sort -nr | awk 'NR==1 { $1=""; | ||
+ | </ | ||
+ | * grep for valid IP Addresses. | ||
+ | < | ||
+ | grep -E -o " | ||
+ | </ | ||
+ | * show used inode count for subdirectories. | ||
+ | < | ||
+ | find */ | sed ' | ||
+ | </ | ||
+ | * free all caches | ||
+ | < | ||
+ | free && sync && echo 3 > / | ||
+ | </ | ||
+ | * rescan all SCSI buses | ||
+ | < | ||
+ | for i in / | ||
+ | </ | ||
+ | * enlarge LVM | ||
< | < | ||
- | $ dig +short myip.opendns.com @resolver1.opendns.com | + | fdisk /dev/sdk |
+ | #set partition type to Linux LVM (type 8e) | ||
+ | pvcreate /dev/sdk1 | ||
+ | vgextend VolGroupDB /dev/sdk1 | ||
+ | lvextend -l +100%FREE / | ||
+ | resize2fs -p / | ||
+ | #for xfs use xfs_growfs / | ||
+ | parted -a optimal /dev/sdc mklabel gpt | ||
+ | parted -a optimal /dev/sdc mkpart p 0% 100% | ||
+ | parted -a optimal /dev/sdc set 1 lvm on | ||
+ | vgextend VGEXL /dev/sdf1 | ||
+ | lvresize -l +100%free / | ||
</ | </ | ||
- | * Math on the cli | + | * Enlarge LVM 2 |
< | < | ||
- | + | echo '1' > / | |
- | Basic operations | + | yum install cloud-utils-growpart |
- | + | growpart | |
- | $ echo $((1+1)) | + | pvresize /dev/sdd1 |
- | 2 | + | lvextend -l +100%FREE |
- | $ echo $((3-1)) | + | xfs_growfs / |
- | 2 | + | |
- | $ echo $((4/2)) | + | |
- | 2 | + | |
- | $ echo $((1*2)) | + | |
- | 2 | + | |
- | + | ||
- | Floating point calculations | + | |
- | + | ||
- | $ echo "2*2.2/2.2" | bc | + | |
- | 2 | + | |
- | + | ||
- | $ echo "4.4+7/8-(4.74*3.14)" | + | |
- | -10.48 | + | |
</ | </ | ||
- |
bash_oneliners.1444307466.txt.gz · Last modified: 2015/12/19 14:59 (external edit)